Journal papers

    2024

  • T. Tsukahara, T. Ishigami, and M. Irikura, "Deep learning estimation of scalar source distance for different turbulent and molecular diffusion environments," J. Fluid Sci. & Tech., 19(2) (2024), JFST0020. [Online Journal (Open Access)]

  • 2023

  • K. Nakagawa, T. Ishida, and T. Tsukahara, "Effects of freestream turbulence on the secondary instability of the roughness-induced crossflow vortex in swept flat plate boundary layers," Int. J. Heat & Fluid Flow, 102 (2023), 109161. [Online Journal (Open Access)]
  • T. Homma, T. Yamashita, R. Wada, K. Kawazu, K. Kurose, T. Tsukahara, and I. Ueno, "Multicellular structures in thin free liquid films induced by thermocapillary effect," J. Colloid & Interface Sci., 641 (2023), 187-196. [Online Journal]
  • S. Hara, K. Watanabe, Y. Kaiho, T. Tsukahara, and Y. Kawaguchi, "Dissimilar turbulent momentum and heat transfer associated with viscoelastic vibration in channel flow," Int. J. Heat & Mass Transfer, 207 (2023), 123991. [Online Journal]
  • K. Nakagawa, T. Tsukahara, and T. Ishida, "DNS study on turbulent transition induced by an interaction between freestream turbulence and cylindrical roughness in swept flat-plate boundary layer," Aerospace, 10(2) (2023), 128. [Online Journal (Open Access)]


    2022

  • T. Ishigami, M. Irikura, and T. Tsukahara, "Applicability of convolutional neural network for estimation of turbulent diffusion distance from source point," Processes, 10(12) (2022), 2545. [Online Journal (Open Access)]
  • T. Ishida, K. Ohira, R. Hosoi, N. Tokugawa, and T. Tsukahara, "Numerical and experimental analysis of three-dimensional boundary-layer transition induced by isolated cylindrical roughness elements," Int. J. Aeronaut. & Space Sci., 23(4) (2022), 649-659. [Online Journal (Open Access)]
  • K. Kohyama, M. Sano, and T. Tsukahara, "Sidewall effect on turbulent band in subcritical transition of high-aspect-ratio duct flow," Phys. Fluids, 34 (2022), 084112. [Online Journal (Open Access)]
  • T. Kawata and T. Tsukahara, "Spectral analysis on dissimilarity between turbulent momentum and heat transfers in plane Couette turbulence," Phys. Fluids, 34 (2022), 075135. [Online Journal (Open Access)]
  • Y. Matsukawa and T. Tsukahara, "Subcritical transition of Taylor-Couette-Poiseuille flow at high radius ratio" Phys. Fluids, 34 (2022), 074109. [Online Journal (Open Access)]
  • T. Kawata and T. Tsukahara, "Spectral analysis on transport budgets of turbulent heat fluxes in plane Couette turbulence," Energies, 15(14) (2022), 5258. [Online Journal (Open Access)]
  • T. Nimura and T. Tsukahara, "Viscoelasticity-induced instability in plane Couette flow at very low Reynolds number," Fluids, 7(7) (2022), 241. [Online Journal (Open Access)]
  • T. Ishigami, M. Irikura, T. Tsukahara, "Machine learning to estimate the mass-diffusion distance from a point source under turbulent conditions," Processes, 10(5) (2022), 860. [Online Journal (Open Access)] Editor's Choice article
  • T. Ishida, T. Tsukahara, N. Tokugawa, "Parameter effects of spanwise-arrayed cylindrical roughness elements on transition in the Falkner-Skan-Cooke boundary layer," Trans. Japan Soc. Aeronaut. & Space Sci., 65(2) (2022), 84-94. [Online Journal (Open Access)]


    2021

  • T. Hosoya, Y. Kametani, T. Osawa, T. Tsukahara, Y. Hasegawa, "Estimation of flow around a cylinder in a duct based on plane measurement by four-dimensional variational approach," Seisan Kenkyu, 73(1) (2014), 77-81. (in Japanese) [Online Journal]
  • T. Kawata and T. Tsukahara, "Scale interactions in turbulent plane Couette flows in minimal domains," J. Fluid Mech., 911 (2021), A55. [Online Journal (Open Access)]


    2020

  • S. Hara, T. Tsukahara, and Y. Kawaguchi, "Turbulent transport dissimilarity with modulated turbulence structure in channel flow of viscoelastic fluid," Int. J. Heat & Fluid Flow, 86 (2020), 108739. [Online Journal]
  • H. Morimatsu and T. Tsukahara, "Laminar-turbulent intermittency in annular Couette-Poiseuille flow: Whether a puff splits or not," Entropy, 22(12), 1353. [Online Journal (Open Access)]
  • K. Takeda, Y. Duguet, and T. Tsukahara, "Intermittency and critical scaling in annular Couette flow," Entropy, 22(9), 988. [Online Journal (Open Access)]
  • S. Fujimura, K. Yamamoto, M. Motosuke, and T. Tsukahara, "Numerical study of thermocapillary-driven flow of a micro bubble on locally heated wall," Heat Transfer Research, 51(12), 1087-1104. [Online Journal]
  • H. Nakamura, V. Delafosse, G. F. Dietze, H. N. Yoshikawa, F. Zoueshtiagh, L. Mu, T. Tsukahara, and I. Ueno, Enhancement of meniscus pump by multiple particles," Langmuir, 36(16), 4447-4453. [Online Journal]
  • T. Fukuda and T. Tsukahara, "Heat transfer of transitional regime with helical turbulence in annular flow," Int. J. Heat & Fluid Flow, 82 (2020), 108555. [Online Journal (Open Access)]
  • H. Nakamura, T. Ogawa, M. Inoue, T. Hori, L. Mu, H. N. Yoshikawa, F. Zoueshtiagh, G. F. Dietze, T. Tsukahara, and I. Ueno, "Pumping effect of heterogeneous meniscus formed around spherical particle," J. Colloid & Interface Sci., 562 (2020), 133-141. [Online Journal]


    2019

  • K. Kunii, T. Ishida, Y. Duguet, and T. Tsukahara, "Laminar-turbulent coexistence in annular Couette flow," J. Fluid Mech., 879, 579-603. [Online Journal / arXiv]
  • T. Kawata and P.H. Alfredsson, "Scale interactions in turbulent rotating planar Couette flow: insight through the Reynolds stress transport," J. Fluid Mech., 879, 255-295. [Online Journal]
  • K. Kato, T. Kawata, P.H. Alfredsson, R.J. Lingwood, "Investigation of the structures in the unstable rotating-cone boundary layer," Phys. Rev. Fluids, 4, 053903. [Online Journal]


    2018

  • K. Nitta and T. Tsukahara, "Numerical demonstration of in-tube liquid-column migration driven by photoisomerization," Micromachines, 9(10), 533. [Online Journal (Open Access)]
  • T. Tsukahara, T. Tomioka, T. Ishida, Y. Duguet, and G. Brethouwer, "Transverse turbulent bands in rough plane Couette flow," J. Fluid Sci. & Tech., 13(3), JFST0019. [Online Journal (Open Access)]
  • T. Nimura, T. Kawata, and T. Tsukahara, "Viscoelasticity-induced pulsatile motion of 2D roll cell in laminar wall-bounded shear flow," Int. J. Heat & Fluid Flow, 74, 65-75. [Online Journal / arXiv]
  • T. Nimura, T. Kawata, and T. Tsukahara, "Viscoelastic effect on steady wavy roll cells in wall-bounded shear flow," Fluid Dyn. Res., 50(5), 051414. [Online Journal / arXiv]
  • T. Kawata and P.H. Alfredsson, "Inverse interscale transport of the Reynolds shear stress in plane Couette turbulence," Phys. Rev. Lett., 120(24), 244501. [Online Journal]
  • K. Fukudome, T. Tsukahara, and Y. Ogami, "Heat and momentum transfer of turbulent stripe in transitional-regime plane Couette flow," Int. J. Adv. Eng. Sci. & Appl. Math., 10(4), 291-298. [Online Journal]
  • R. Tanaka, T. Kawata, and T. Tsukahara, "DNS of Taylor-Couette flow between counter-rotating cylinders at small radius ratio," Int. J. Adv. Eng. Sci. & Appl. Math., 10(2), 159-170. [Online Journal / arXiv]


    2017

  • S. Hara, T. Tsukahara, and Y. Kawaguchi, "Experimental investigation of streamwise velocity fluctuation based on the Reynolds-number dependency in turbulent viscoelastic-fluid flow," Int. J. Heat & Fluid Flow, 68, 281-289. [Online Journal]
  • D. Kondo, L. Mu, F. de Miollis, T. Ogawa, M. Inoue, T. Kaneko, T. Tsukahara, H.N. Yoshikawa, F. Zoueshtiagh, and I. Ueno, "Acceleration of the macroscopic contact line of a droplet spreading on a substrate after interaction with a particle," Int. J. Microgravity Sci. Appl., 34(4), 340405. [Online Journal (Open Access)]
  • T. Ishida, Y. Duguet, and T. Tsukahara, "Turbulent bifurcations in intermittent shear flows: from puffs to oblique stripes," Phys. Rev. Fluids, 2, 073902. [Online Journal / arXiv]
  • T. Ishida, G. Brethouwer, Y. Duguet, and T. Tsukahara, "Laminar-turbulent patterns with rough walls," Phys. Rev. Fluids, 2, 073901. [Online Journal]
  • N. Kazuno, T. Tsukahara, and M. Motosuke, "Laplace pressure versus Marangoni convection in photothermal manipulation of micro droplet," The Euro. Phys. J. Special Topics, 226, 1337-1348. [Online Journal (Open Access)]
  • S. Hara, R. Ii, T. Tsukahara, and Y. Kawaguchi, "Analysis of an organized turbulent structure using a pattern recognition technique in a drag-reducing surfactant solution flow," Int. J. Heat & Fluid Flow, 63, 56-66. [Online Journal]
  • Y. Fujino, G.F. Attizzani, S. Tahara, T. Naganuma, K. Takagi, H. Yabushita, W. Wang, K. Tanaka, T. Matsumoto, H. Kawamoto, Y. Yamada, S. Amano, Y. Watanabe, T. Warisawa, T. Sato, S. Mitomo, N. Kurita, H. Ishiguro, K. Hozawa, T. Tsukahara, M. Motosuke, H. G. Bezerra, S. Nakamura, and S. Nakamura, "Difference in vascular response between sirolimus-eluting- and everolimus-eluting stents in ostial left circumflex artery after unprotected left main as observed by optical coherence tomography," Int. J. Cardiology, 230, 284-292. [Online Journal]
  • T. Ishida and T. Tsukahara, "Friction factor of annular Poiseuille flow in a transitional regime," Adv. Mech. Eng., 9 (1), DOI: 10.1177/1687814016683358 (10 pages). [Online Journal (Open Access)]


    2016

  • M. Endo, Q.-Q. Shao, T. Tsukahara, and Y. Kawaguchi, "Analysis of high concentration spikes appearing in mass plume in nearly homogeneous turbulent flow based on the PDF transport equation," Open J. Fluid Dyn., 6 (4), 472-495. [Online Journal (Open Access)]
  • Q.-Q. Shao, T. Tsukahara, and Y. Kawaguchi, "Study on the shear effect on dye patches diffused in wall-bounded shear flow," Open J. Fluid Dyn., 6 (4), 438-452. [Online Journal (Open Access)]
  • M. Endo, Q.-Q. Shao, T. Tsukahara, and Y. Kawaguchi, "Diffusion process of high concentration spikes in a quasi-homogeneous turbulent flow," Open J. Fluid Dyn., 6 (4), 371-390. [Online Journal (Open Access)]
  • Q.-Q. Shao, D. Sekine, T. Tsukahara, and Y. Kawaguchi, "Inverse source locating method based on graphical analysis of dye plume images in a turbulent flow," Open J. Fluid Dyn., 6 (4), 343-360. [Online Journal (Open Access)]
  • D. Cerizza, W. Sekiguchi, T. Tsukahara, T.A. Zaki, and Y. Hasegawa, "Reconstruction of scalar source intensity based on sensor signal in turbulent channel flow," Flow, Turbulence & Combustion, 97, 1211-1233.
    [Online Journal / SN ShareIt (Open Access)]
  • T. Tsukahara, S. Hara, S. Kawada, and Y. Kawaguchi, "Experimental study on functionality of surfactant solution in turbulent heat transfer by varying local shear rate," Int. J. Heat & Mass Transfer, 102, 360-368. [Online Journal]
  • T. Tsukahara, K. Oyagi, and Y. Kawaguchi, "Estimation method to identify scalar point source in turbulent flow based on Taylor's diffusion theory," Environmental Fluid Mechanics, 16 (3), 521-537. [Online Journal / SN ShareIt (Open Access)]
  • T. Ishida, Y. Duguet, and T. Tsukahara, "Transitional structures in annular Poiseuille flow depending on radius ratio," J. Fluid Mech., 794, R2 (11 pages). [Online Journal]


    2015

  • Z. Fu, Y. Iwaki, M. Motozawa, T. Tsukahara, and Y. Kawaguchi, "Characteristic turbulent structure of a modified drag-reduced surfactant solution flow via dosing water from channel wall," Int. J. Heat & Fluid Flow, 53, 135-145. [Online Journal]
  • T. Ishida, T. Tsukahara, and Y. Kawaguchi, "Effects of spanwise system rotation on turbulent stripe in plane Poiseuille flow," J. Turbulence, 16, 273-289. [Online Journal]


    2014

  • H. Ichikawa, T. Tsukahara, K. Iwamoto, Y. Kawaguchi, "Visualization study and determination of measurable range of an ultrasonic vortex flowmeter for gas-liquid two-phase flow," Trans. Soc. Instrument and Control Engineers, 50 (10), 703-711. (in Japanese) [Online Journal]
  • H. Ichikawa, K. Iwamoto, T. Tsukahara, Y. Kawaguchi, "Denoising signal processing and diameter effect on ultrasonic-vortex-flowmeter measurement of a bubble-laden flow," Trans. Soc. Instrument and Control Engineers, 50 (5), 404-410. (in Japanese) [Online Journal]
  • T. Ishida, T. Tsukahara, and Y. Kawaguchi, "Large-scale structure alternation in rotating plane Poiseuille flow at transitional Reynolds number," Appl. Thermal Eng., 72 (1), 70-81. [Online Journal]
  • T. Tsukahara, M. Tanabe, and Y. Kawaguchi, "Effect of fluid viscoelasticity on turbulence and large-scale vortices behind wall-mounted plates," Adv. Mech. Eng., 2014, Article ID 823138 (12 pages). [Online Journal (Open Access)]
  • T. Tsukahara, T. Kawase, and Y. Kawaguchi, "Heat transfer in a viscoelastic orifice flow at low to moderate Reynolds numbers," Computational Thermal Sci., 6 (1), 79-90. [Online Journal]


    2013

  • T. Tsukahara and Y. Kawaguchi, "Proposal of damping function for low-Reynolds-number k-ε model applicable in prediction of turbulent viscoelastic-fluid flow," J. Appl. Math., 2013, Article ID 197628 (15 pages). [Online Journal (Open Access)]
  • H. Ichikawa, T. Tsukahara, Y. Kawaguchi, H. Kawamura, "Character of the ultrasonic reflection and suggestion of the countermeasure for gas-liquid two-phase flow in vortex flowmeter," Trans. Soc. Instrument and Control Engineers, 49 (6), 612-618. (in Japanese) [Online Journal]
  • T. Tsukahara, M. Motozawa, D. Tsurumi, and Y. Kawaguchi, "PIV and DNS analyses of viscoelastic turbulent flows behind a rectangular orifice," Int. J. Heat & Fluid Flow 41, 66-79. [Online Journal]
  • T. Tsukahara, M. Ishikawa, and Y. Kawaguchi, "DNS study of the turbulent Taylor-vortex flow on a ribbed inner cylinder," Adv. Mech. Eng. 2013, Article ID 628490 (12 pages). [Online Journal (Open Access)]
  • T. Tsukahara, T. Kawase, and Y. Kawaguchi, "DNS on turbulent heat transfer of viscoelastic fluid flow in a plane channel with transverse rectangular orifices," Progress in Comput. Fluid Dyn. 13 (3/4), 212-223. [Online Journal]
  • X. Wu, N. Washio, H. Aida, T. Tsukahara, Y. Kawaguchi, and B. Yu, "PIV study on intermittent flow structure in Poiseuille channel flow at transitional Reynolds number," J. Xi'an Jiaotong Univ. 47 (1), 101-106. (in Chinese)


    2011-2012

  • T. Tsukahara, Y. Sakamoto, D. Aoshima, M. Yamamoto, and Y. Kawaguchi, "Visualization and laser measurements on the flow field and sand movement on sand dunes with porous fences," Exp. Fluids 52 (2012), 877-890. [Online Journal]
  • T. Tsukahara and Y. Kawaguchi, "Comparison of heat-transfer reduction in drag-reduced turbulent channel flows with different fluid and thermal boundary conditions," Progress in Comput. Fluid Dyn. 11 (2011), 215-225. [Online Journal / Preprint (PDF, 349KB)]
  • T. Tsukahara, T. Kawase, and Y. Kawaguchi, "DNS of viscoelastic turbulent channel flow with rectangular orifice at low Reynolds number," Int. J. Heat & Fluid Flow 32 (2011), 529-538. [Online Journal / Preprint (PDF, 716KB)]
  • T. Tsukahara, T. Ishigami, B. Yu, and Y. Kawaguchi, "DNS study on viscoelastic effect in drag-reduced turbulent channel flow," J. Turbulence 12 (2011), N13 (25 pages). [Online Journal / Preprint (PDF, 588KB)]


    2005-2010

  • T. Tsukahara, N. Tillmark, and P.H. Alfredsson, "Flow regimes in a plane Couette flow with system rotation," J. Fluid Mech. 648 (2010), 5-33. [Online Journal / Preprint (PDF, 6.2MB)] [Seleted as a Focus on Fluids article]
  • T. Koyama, T. Tsukahara, T. Matsumoto, Y. Jiang, and B. Li, "Numerical simulation of laboratory coupled shear-flow tests for rock fractures," J. Soc. Materials Sci., Japan, Vol. 59, No. 3 (2010), 205-210. (in Japanese) [Online Journal]
  • T. Tsukahara, K. Iwamoto, H. Kawamura, "On the large-scale structure of turbulent heat transfer in a plane Couette flow," Thermal Sci. & Eng. 15 (2007), 151-162. (in Japanese) [Online Journal]
  • T. Tsukahara, H. Kawamura, and K. Shingai, "DNS of turbulent Couette flow with emphasis on the large-scale structure in the core region," J. Turbulence 7 (2006), N19 (16 pages). [Online Journal]
  • T. Tsukahara and H. Kawamura, "Stretching rate of material lines in turbulent channel flow," Nagare 24 (2005), 609-618. (in Japanese) [Online Journal]
  • T. Tsukahara, S. Hane, and H. Kawamura, "DNS of turbulent heat transfer in plane Couette flow with emphasis on the large-scale structure," Thermal Sci. & Eng. 13 (2005), 81-82.

Review papers /

    2013-

  • T. Tsukahara, "Deep learning for viscoelastic fluids and turbulent diffusion," JSME Fluids Engineering Division Newsletter, 2022.11 (2022).[Online Page (Open Access)]
  • T. Tsukahara, Y. Kawaguchi,"CNN image recognition for source estimation of turbulent mass diffusion",Nagare, 38(5) (2019), 337-342. (in Japanese) [Online Journal]
  • K. Fukagata, M. Yamamoto, K. Iwamoto, Y. Hasegawa, T. Tsukahara, N. Fukushima, H. Mamori, Y. Aoki,"Toward construction of feature extraction method for turbulence using machine learning",Nagare, 37(6) (2018), 524-527. (in Japanese) [Online Journal]
  • K. Kunii, T. Ishida, T. Tsukahara, "Effects of wall curvature on localized turbulent structures and statistics in transitional sliding Couette flow," Nagare, 35(6) (2016), 475-480. (in Japanese) [Online Journal]

  • Y. Kawaguchi, T. Tsukahara, "Turbulence and convective heat transfer in flow of surfactant solution," Journal of the Heat Transfer Society of Japan, 55(231) (2016), 9-14. (in Japanese) [Online Journal]
  • T. Tsukahara and T. Ishida, "Lower bound of subcritical transition in plane Poiseuille flow," Nagare, 34(6) (2015), 383-386. (in Japanese) [Online Journal (Open Access)]
  • S. Hara, R. Ii, T. Tsukahara, and Y. Kawaguchi, "Consideration for turbulence energy spectrum in drag-reducing flow with surfactant additive," Nagare, 33(6) (2014), 531-538. (in Japanese) [Online Journal (Open Access)]
  • Y. Kawaguchi, T. Tsukahara, and M. Motozawa, "Turbulent eddy structures appearing in viscoelastic fluids," Transactions of the Japan Society of Mechanical Engineers, 79(808) (2013), 2660-2669. (in Japanese) [Online Journal]

Conference papers/abstracts/talks

    2024

  • T. Tsukahara, S. Okazaki, K. Nakagawa, T. Ishida, "Turbulent spot growth in swept-flat-plate boundary layer," The 69th Workshop on Investigation and Control of Transition to Turbulence, Nagano, Japan, Mar. 10-11 (2024).

    2023

  • R. Araki, "How forgetful is turbulent cascade?," Dynamics Days 2023 (DD2023), Tokyo, Japan, Dec. 4-8 (2023).
  • T. Tsukahara, "Deep neural network surrogate model for predicting viscoelastic channel flows," The 9th Asian Symposium on Computational Heat Transfer and Fluid Flow (ASCHT2023), Thuwal, Saudi Arabia, Dec. 4-6 (2023), ASCHT2023-112.
  • K. Nakagawa, T. Ishida, T. Tsukahara, "Investigation of the transition process due to cylindrical roughness and freestream turbulence in the swept flate plate bary layer," The 68th Workshop on Investigation and Control of Transition to Turbulence, Tokyo, Japan, Oct. 24-25 (2023).
  • K. Kohyama, T. Tsukahara, "Turbulent-laminar coexisting structures and traveling waves in annular Couette flows at low Reynolds number," The 68th Workshop on Investigation and Control of Transition to Turbulence, Tokyo, Japan, Oct. 24-25 (2023).
  • S. Someya and T. Tsukahara, "CNN for scalar-source distance estimation in grid-generated turbulence," In: Proc. of the 33rd Int. Symp. on Transport Phenomena (ISTP33), Kumamoto, Japan, Sep. 24-27 (2023), 130, 8 pages.
  • T. Takahashi and T. Tsukahara, "Two-stage instability in viscoelastic rotating plane Couette flow," In: Proc. of the 33rd Int. Symp. on Transport Phenomena (ISTP33), Kumamoto, Japan, Sep. 24-27 (2023), 78, 4 pages.
  • T. Ishigami, M. Irikura, and T. Tsukahara, "Point source estimation via deep learning for passive scalar turbulent diffusion," In: Proc. the 10th Int. Symp. on Turbulence, Heat & Mass Transfer (THMT10), Rome, Italy, Sep. 11-15 (2023), pp. 357-360.
  • Y. Matsukawa and T. Tsukahara, "Parameter dependence of switching between supercritical and subcritical turbulent transitions in inner-cylinder rotating or-Couette-Poiseuille flow," In: Proc. the 10th Int. Symp. on Turbulence, Heat & Mass Transfer (THMT10), Rome, Italy, Sep. 11-15 (2023), pp. 97-100.
  • K. Nakagawa, T. Ishida, and T. Tsukahara, "Premature secondary instabilities induced by freestream turbulence in swept flat plate boundary layer," In: Proc. the 10th Int. Symp. on Turbulence, Heat & Mass Transfer (THMT10), Rome, Italy, Sep. 11-15 (2023), pp. 73-76.
  • K. Kohyama and T. Tsukahara, "Reproducing turbulent puff split and decay in transitional annular flow by a two-variable stochastic model," In: Proc. the 10th Int. Symp. on Turbulence, Heat & Mass Transfer (THMT10), Rome, Italy, Sep. 11-15 (2023).
  • K. Kohyama and T. Tsukahara, "Turbulence maintenance limitation at low Reynolds number in annular Couette flow with very small radius ratios," In: Abst. of the 18th EUROMECH European Turbulence Conf. (ETC18), Valencia, Spain, Sep. 4-6 (2023), 504 (1 page).
  • K. Nakagawa, T. Ishida, and T. Tsukahara, "Parametric study on the effects of cylindrical cavities on transition in the Falkner-Skan-Cooke boundary layer," In: Abst. of the 18th EUROMECH European Turbulence Conf. (ETC18), Valencia, Spain, Sep. 4-6 (2023), 147 (1 page).
  • T. Tsukahara, "Deep learning estimation of scalar source in turbulence," AJKFED2023 (The ASME-JSME-KSME Joint Fluids Engineering Conf.), Osaka, Japan, July 9-13 (2023). [Invited Talk]
  • T. Nimura, T. Kawata, T. Tsukahara, "Vortex modulation and instability due to viscoelasticity in wall-bounded shear flow," AJKFED2023 (The ASME-JSME-KSME Joint Fluids Engineering Conf.), Osaka, Japan, July 9-13 (2023).
  • K. Kohyama, T. Tsukahara, "Reproducing spatio-temporal intermittency of turbulent puffs with Domany-Kinzel model," 22nd Int. Couette-Taylor Workshop (ICTW22), Barcelona, Spain, June 28-30 (2023).
  • Y. Matsukawa, T. Tsukahara, "Different flow state transition processes of Taylor-Couette-Poiseuille flow based on Taylor vortex," 22nd Int. Couette-Taylor Workshop (ICTW22), Barcelona, Spain, June 28-30 (2023).
  • T. Tsukahara, "Photoactivated capillary flow for advanced droplet manipulation: a numerical study," 8th Annual Conf. of AnalytiX-2023, Osaka, Japan, May 17-19 (2023). [Invited Talk]
  • Y. Matsukawa, T. Tsukahara, "Direct numerical simulations of Taylor-Couette-Poiseuille flows at high radius ratios: classification of flow state transition processes," The 67th Workshop on Investigation and Control of Transition to Turbulence, Tokyo, Japan, Mar. 29-30 (2023).
  • Y. Horimoto, K. Yatsushiro, T. Tsukahara, "Turbulence-laminar transition of annular Poiseuille flow depending on diameter ratio and eccentricity," The 67th Workshop on Investigation and Control of Transition to Turbulence, Tokyo, Japan, Mar. 29-30 (2023).
  • T. Nimura, T. Kawata, T. Tsukahara, "Vortex modulation and instability due to viscoelasticity in wall-bounded shear flow," The 67th Workshop on Investigation and Control of Transition to Turbulence, Tokyo, Japan, Mar. 29-30 (2023).
  • T. Kawata, T. Tsukahara, "Forward and inverse interscale energy transports in a turbulent plane Couette flow," The 67th Workshop on Investigation and Control of Transition to Turbulence, Tokyo, Japan, Mar. 29-30 (2023).


    2022

  • T. Kurihara, T. Ishigami, and T. Tsukahara, "Inter- and extra-polations of source estimation by CNN to identify a scalar point source in turbulent channel flow," In: Proc. of 9th Asian Joint Workshop on Thermophysics and Fluid Science (AJWTF2022), Utsunomiya, Japan, Nov. 27-30 (2022), 4119 (7 pages).
  • R. Onishi, T. Tsukahara, D. Henzel, T. Osawa, and Y. Hasegawa, "Research on scalar source search by physics-informed neural network and a robot with a sensor," In: Proc. of 9th Asian Joint Workshop on Thermophysics and Fluid Science (AJWTF2022), Utsunomiya, Japan, Nov. 27-30 (2022), 4118 (5 pages).
  • T. Takahashi, T. Nimura, and T. Tsukahara, "Flow pattern of rotating plane Couette flow at low Reynolds number with viscoelastic fluid," In: Proc. 9th Asian Joint Workshop on Thermophysics and Fluid Science (AJWTF2022), Utsunomiya, Japan, Nov. 27-30 (2022), 4065 (6 pages).
  • S. Someya, T. Ishigami, and T. Tsukahara, "CNN-based estimation of scalar diffusion source distance under grid-generated turbulence," In: Proc. 9th Asian Joint Workshop on Thermophysics and Fluid Science (AJWTF2022), Utsunomiya, Japan, Nov. 27-30 (2022), 4054 (7 pages).
  • D. Yamamoto, T. Tsukahara, and Y. Fujino, "Numerical study on impact of thinner strut thickness on blood flow using stent structural analysis," In: Proc. 9th Asian Joint Workshop on Thermophysics and Fluid Science (AJWTF2022), Utsunomiya, Japan, Nov. 27-30 (2022), 4047 (6 pages).
  • Y. Matsukawa and T. Tsukahara, "Different transition processes of Taylor-Couette-Poiseuille flow based on modulated wavy Taylor vortex," In: Proc. 9th Asian Joint Workshop on Thermophysics and Fluid Science (AJWTF2022), Utsunomiya, Japan, Nov. 27-30 (2022), 4028 (5 pages).
  • M. Tashiro and T. Tsukahara, "Prediction of constitutive stress for viscoelastic fluid turbulence with LSTM," In: Proc. 9th Asian Joint Workshop on Thermophysics and Fluid Science (AJWTF2022), Utsunomiya, Japan, Nov. 27-30 (2022), 4023 (5 pages).
  • Y. Matsukawa and T. Tsukahara, "Laminarization in subcritical Taylor-Couette-Poiseuille flow with increasing pressure gradient," In: Proc. of Nineteenth Int. Conf. on Flow Dynamics (ICFD2022), Sendai, Japan, Nov. 9-11 (2022), pp. 732-735.
  • S. Okazaki, K. Nakagawa, T. Ishida, and T. Tsukahara, "Numerical study on development of a turbulent spot in the swept-flat-plate three-dimensional boundary layer," In: Proc. the 2022 Asia-Pacific Int. Symp. Aerospace Technology (APISAT2022), Niigata, Japan, (Hybrid Event), Octy. 12-14 (2022), S46-5 (5 pages).
  • J. Hiraga, K. Nakagawa, T. Ishida, and T. Tsukahara, "Effect of distributed roughness on turbulent transition in the three-dimensional boundary layer," In: Proc. the 2022 Asia-Pacific Int. Symp. Aerospace Technology (APISAT2022), Niigata, Japan, (Hybrid Event), Oct. 12-14 (2022), S46-4 (4 pages).
  • S. Shinkai, K. Nakagawa, T. Ishida, and T. Tsukahara, "Direct numerical simulation of turbulent transition in swept-flat-plate boundary layer over a cavity," In: Proc. the 2022 Asia-Pacific Int. Symp. Aerospace Technology (APISAT2022), Niigata, Japan, (Hybrid Event), Oct. 12-14 (2022), S46-3 (6 pages).
  • R. Hosoi, T. Ishida, N. Tokugawa, and T. Tsukahara, "Experimental study on the variation of transition point in a swept flat plate boundary layer with cylindrical roughness elements," In: Proc. the 2022 Asia-Pacific Int. Symp. Aerospace Technology (APISAT2022), Niigata, Japan, (Hybrid Event), Oct. 12-14 (2022), S46-2 (5 pages).
  • K. Nakagawa, T. Ishida, and T. Tsukahara, "Transition process of crossflow vortices due to the cylindrical roughness and cavity in the three-dimensional boundary layer," In: Proc. the 2022 Asia-Pacific Int. Symp. Aerospace Technology (APISAT2022), Niigata, Japan, (Hybrid Event), Oct. 12-14 (2022), S46-1 (6 pages).
  • K. Kohyama, T. Tsukahara, K. Tamai, and M. Sano, "Effect of the presence or absence of sidewalls on the subcritical transition of channel flow and the directed percolation phenomena," The 66th Workshop on Investigation and Control of Transition to Turbulence, Tokyo, Japan, Sep. 25-26 (2022).
  • K. Yatsushiro, Y. Horimoto, and T. Tsukahara, "Visualization of intermittent turbulent structure in eccentric annular pipe flow," In: Proc. the 13th Pacific Symp. on Flow Visualization and Image Processing (PSFVIP13), Tokyo, Japan, (Hybrid Event), Aug. 7-10 (2022), 7 (5 pages).
  • M. Tashiro and T. Tsukahara, "DNS-CNN simulation of viscoelastic turbulent flow using U-Net," The 15th World Congress in Computational Mechanics & 8th Asian Pacific Congress on Computational Mechanics (WCCM-APCOM 2022), Yokohama, Japan (Online), July 31 - Aug. 5 (2022), 1348.
  • K. Nakagawa, T. Ishida, and T. Tsukahara, "Freestream-turbulence independence of secondary instability of cross-flow vortices in swept-flat-plate boundary layer," In: Proc. the 12th Int. Symp. on Turbulence and Shear Flow Phenomena (TSFP12), Osaka, Japan (Online), Jul. 19-22 (2022), 186 (6 pages).
  • K. Kohyama, M. Sano, K. Tamai, and T. Tsukahara, "Directed percolation phenomena in subcritical transtion of high-aspect-ratio duct flow," In: Proc. the 12th Int. Symp. on Turbulence and Shear Flow Phenomena (TSFP12), Osaka, Japan (Online), Jul. 19-22 (2022), 312 (6 pages).
  • K. Fukudome, H. Mamori, T. Tsukahara, and M. Yamamoto, "Growing turbulent spot in plane Couette flow provides dissimilarity between momentum and heat transfers," In: Proc. the 12th Int. Symp. on Turbulence and Shear Flow Phenomena (TSFP12), Osaka, Japan (Online), Jul. 19-22 (2022), 369 (5 pages).
  • T. Tsukahara, "Subcritical transitions of channel flows: Patterning of localized turbulence," IISc-TUS Joint Webinar, Online, Jun. 9 (2022). [Invited Talk]


    2021

  • T. Tsukahara, "Direct numerical simulation of subcritical wall turbulence using very large aspect-ratio domain," 32nd Workshop on Sustained Simulation Performance (WSSP32), Online, Dec. 13-14 (2021). [Invited Talk]
  • T. Ishida, K. Ohira, R. Hosoi, N. Tokugawa, and T. Tsukahara, "Numerical and experimental study on three-dimensional boundary layer transition induced by the isolated cylindrical roughness elements," Proc. the 12th Asia-Pacific Int. Symp. on Aerospace Tech. (APISAT2021), Jeju, South Korea, (Hybrid Event), Nov. 15-17 (2021), I1-3 P00152 (10 pages).
  • K. Sumikawa, K. Ushijima, and T. Tsukahara, "Numerical simulation of solid-gas-liquid three-phase flow in SLM processing," In: Ext. Abstracts of 2nd Asian Conf. on Thermal Sci. (2nd ACTS), Virtual, Oct. 3-7 (2021), 50414.
  • K. Kawazu, T. Homma, I. Ueno, and T. Tsukahara, "Numerical study on basic-flow patterns of thermal Marangoni convection in rectangular free liquid film," In: Ext. Abstracts of 2nd Asian Conf. on Thermal Sci. (2nd ACTS), Virtual, Oct. 3-7 (2021), 30721.
  • T. Tsukahara, "Scalar-source estimation of turbulent mass diffusion using machine learning," The 8th Int. Workshop on Fluid Flow, Heat Transfer & Turbulent Drag Reduction (IWFHT2021), Qingdao, China, Sep. 27-28 (2021). [Invited Talk]
  • T. Kurihara, T. Ishigami, and T. Tsukahara, "Regression-type inverse estimation by CNN to identify a scalar source in turbulent channel flow," In: Proc. of the 8th Asian Symp. on Computational Heat Transfer and Fluid Flow (ASCHT2021), Qingdao, China (hybrid), Sep. 23-26 (2021), ASCHT2021-266, 6 pages.
  • K. Takeda, M. Sano, and T. Tsukahara, "Side-wall effect of high-aspect-ratio duct flow on turbulent bands in subcritical transition," In: Proc. of the 8th Asian Symp. on Computational Heat Transfer and Fluid Flow (ASCHT2021), Qingdao, China (hybrid), Sep. 23-26 (2021), ASCHT2021-256, 10 pages.
  • Y. Matsukawa and T. Tsukahara, "Subcritical transition of Taylor-Couette-Poiseuille flow," In: Proc. of the 8th Asian Symp. on Computational Heat Transfer and Fluid Flow (ASCHT2021), Qingdao, China (hybrid), Sep. 23-26 (2021), ASCHT2021-241, 6 pages. [Best Paper Award]
  • T. Hosoya, T. Osawa, Y. Kametani, T. Tsukahara, and Y. Hasegawa, "Estimation of 3D duct flow past a cylinder based on 2D-plane measurement by 4D-Var," In: Proc. of the 8th Asian Symp. on Computational Heat Transfer and Fluid Flow (ASCHT2021), Qingdao, China (hybrid), Sep. 23-26 (2021), ASCHT2021-165, 9 pages.
  • K. Nakagawa, T. Tsukahara, and T. Ishida, "Turbulent transition induced by an interaction between freestream turbulence and discrete roughness in swept-flat-plate boundary layer," In: Proc. of the 8th Asian Symp. on Computational Heat Transfer and Fluid Flow (ASCHT2021), Qingdao, China (hybrid), Sep. 23-26 (2021), ASCHT2021-077, 7 pages.
  • T. Tsukahara, C. Izumi, Y. Matsukawa, and K. Takeda, "Patterning of turbulent natural convection in vertical channel," In: Proc. of the 8th Asian Symp. on Computational Heat Transfer and Fluid Flow (ASCHT2021), Qingdao, China (hybrid), Sep. 23-26 (2021), ASCHT2021-041, 2 pages.
  • K. Takeda and T. Tsukahara, "Intermittent turbulent structures in subcritical transition of annular Couette flow with/without imaginary domain," In: Abst. 25th Int. Congress of Theor. Appl. Mech. (ICTAM2020+1), Milano, Italy (virtual), Aug. 22-27 (2021), pp. 98-99.
  • H. Morimatsu and T. Tsukahara, "Study of intermittent structure in annular Couette-Poiseuille flow from turbulent puff to turbulent stripe," In: Abst. 25th Int. Congress of Theor. Appl. Mech. (ICTAM2020+1), Milano, Italy (virtual), Aug. 22-27 (2021), pp. 114-115.
  • K. Fukudome, T. Tsukahara, H. Mamori, and M. Yamamoto, "Emergence of transport dissimilarity by growing turbulent spot in plane Couette flow," In: Abst. 25th Int. Congress of Theor. Appl. Mech. (ICTAM2020+1), Milano, Italy (virtual), Aug. 22-27 (2021), pp. 1323-1324.
  • Y. Matsukawa and T. Tsukahara, "Occurrence and disappearance of localized turbulence in Taylor-Couette-Poiseuille flow," 21st Int. Couette-Taylor Workshop (ICTW21), Virtual Meeting, July 5-9 (2021).
  • T. Tsukahara,"Scalar-source estimation of turbulent mass diffusion using machine learning," IISc-TUS Joint Workshop in Data Sciences, Online, May. 20 (2021). [Invited Talk]
  • R. Sakakibara, T. Nimura, T. Tsukahara, and T. Ishida, "Critical roughness heights of turbulent transition on a swept laminar-flow wing," In: Proc. of AIAA Scitech 2021 Forum, (Virtual Event), Jan. 11-15 & 19-21 (2021), AIAA 2021-1854 (11 pages). [Online Proceedings]
  • R. Sakakibara, T. Nimura, T. Ishida, and T. Tsukahara,"DNS-NPSE analysis of turbulent transition on swept wing with roughness elements," In: Abstracts Proc. of the joint 14th World Congress in Comput. Mech. and ECCOMAS Congress (WCCM-ECCOMAS CONGRESS), Paris, France (virtual), Jan. 11-15 (2021), 3673.


    2020

  • K. Takeda, Y. Duguet, and T. Tsukahara,"DNS study of annular Couette flow for low-high radius ratio in subcritical transition," In: Proc. of 17th Int. Conf. on Flow Dynamics (ICFD2020), Sendai, Japan (virtual), Oct. 28-30 (2020), pp. 448-451.


    2019

  • K. Takeda and T. Tsukahara, "New knowledge as DP universality class on the subcritical turbulent transitions of wall-bounded shear flows," Abstract Proc. of 7th Asia-Pacific Congress on Comput. Mech. (APCOM2019), Taipei, Taiwan, Dec. 18-20 (2019), p. 281.
  • H. Morimatsu and T. Tsukahara, "Parameter dependences of intermittent turbulent regime of annular Couette-Poiseuille flow," Abstract Proc. of 7th Asia-Pacific Congress on Comput. Mech. (APCOM2019), Taipei, Taiwan, Dec. 18-20 (2019), p. 280.
  • K. Fukudome, T. Tsukahara, and M. Yamamoto, "Emergence of dissimilarity between heat and momentum transports for turbulent stripes in transitional plane Couette flow," Abstract Proc. of 7th Asia-Pacific Congress on Comput. Mech. (APCOM2019), Taipei, Taiwan, Dec. 18-20 (2019), p. 278.
  • T. Nimura, T. Kawata, and T. Tsukahara, "Study on viscoelasticity-induced spatio-temporal modulation of roll cells in wall-bounded shear flow," Abstract Proc. of 7th Asia-Pacific Congress on Comput. Mech. (APCOM2019), Taipei, Taiwan, Dec. 18-20 (2019), p. 275.
  • S. Tamura, T. Tsukahara, T. Osawa, and Y. Hasegawa,"Experimental study on evaporation process and particle sedimentation in pendant droplets," Ext. Abstract of the 2nd Pacific Rim Thermal Eng. Conf. (PRTEC), Maui Island, USA, Dec. 13-17 (2019), PRTEC-24403, 4 pages.
  • S. Fujimura and T. Tsukahara,"Numerical study on flow near the contact line of a locally heated micro vapor bubble," Ext. Abstract of the 2nd Pacific Rim Thermal Eng. Conf. (PRTEC), Maui Island, USA, Dec. 13-17 (2019), PRTEC-24389, 4 pages.
  • K. Oda, T. Tsukahara, and Y. Kawaguchi,"Applicability of Reynolds stress model for drag-reducing turbulent flow over backward-facing step," In: Proc. of the 2nd Pacific Rim Thermal Engineering Conf. (PRTEC), Ext. Abstract of the 2nd Pacific Rim Thermal Eng. Conf. (PRTEC), Maui Island, USA, Dec. 13-17 (2019), PRTEC-24384, 4 pages.
  • T. Fukuda and T. Tsukahara, "Influence of large-scale intermittent structure on heat transfer in the transition regime of annular Poiseuille flow," Ext. Abstract of the 2nd Pacific Rim Thermal Eng. Conf. (PRTEC), Maui Island, USA, Dec. 13-17 (2019), PRTEC-24208, 4 pages.
  • K. Fukudome, T. Tsukahara, H. Mamori, and M. Yamamoto,"Heat and momentum transports of turbulent spot in plane Couette flow," Ext. Abstract of the 2nd Pacific Rim Thermal Eng. Conf. (PRTEC), Maui Island, USA, Dec. 13-17 (2019), PRTEC-24167, 5 pages.
  • K. Fukudome, T. Tsukahara, H. Mamori, and M. Yamamoto, "Development of turbulent spot in plane Couette flow and dissimilarity analysis between heat and momentum transfers," The 65th Workshop on Investigation and Control of Transition to Turbulence, Nagano, Japan, Nov. 17-18 (2019).
  • H. Nakamura, V. Delafosse, G. Dietze, H.N. Yoshikawa, F. Zoueshtiagh, L. Mu, T. Tsukahara, and I. Ueno, "Numerical simulation of spreading liquid film subject to interaction with two spherical particles on horizontal smooth substrate," Microfluidics 2019, Rueil-Malmaison, France, Nov. 13-15 (2019).
  • R. Sakakibara, T. Nimura, T. Tsukahara, and. Ishida, "Integrated analysis of direct numerical simulations and nonlinear parabolized stability equations," Proc. the 7th Asian Symp. on Computational Heat Transfer and Fluid Flow (ASCHT2019), Tokyo, Japan, Sep. 3-7 (2019), I221, 2 pages.
  • M. Okada, T. Nimura, T. Tsukahara, and. Ishida, "DNS of turbulent transition induced by streamwise sinusoidal roughness in swept flat plate boundary layer," Proc. the 7th Asian Symp. on Computational Heat Transfer and Fluid Flow (ASCHT2019), Tokyo, Japan, Sep. 3-7 (2019), I213, 2 pages.
  • M. Hanabusa and T. Tsukahara, "Study on robustness of turbulent stripe in particle-laden channel flows with/without considering gravitational effect," Proc. the 7th Asian Symp. on Computational Heat Transfer and Fluid Flow (ASCHT2019), Tokyo, Japan, Sep. 3-7 (2019), I211, 2 pages.
  • K. Takeda and T. Tsukahara, "Subcritical transition of plane Poiseuille flow as DP universality classes in (2+1) and (1+1) dimensions," Proc. the 7th Asian Symp. on Computational Heat Transfer and Fluid Flow (ASCHT2019), Tokyo, Japan, Sep. 3-7 (2019), I112, 2 pages.
  • H. Morimatsu and T. Tsukahara, "Direct numerical simulation of annular Couette-Poiseuille flow: intermittent structures depending on pressure gradient and radius ratio," Proc. the 7th Asian Symp. on Computational Heat Transfer and Fluid Flow (ASCHT2019), Tokyo, Japan, Sep. 3-7 (2019), I111, 2 pages.
  • A. Nagamachi and T. Tsukahara, "Prediction of viscoelastic turbulent channel flow using deep learning," Proc. the 7th Asian Symp. on Computational Heat Transfer and Fluid Flow (ASCHT2019), Tokyo, Japan, Sep. 3-7 (2019), F214, 2 pages.
  • S. Fujimura, K. Yamamoto, M. Motosuke, and T. Tsukahara, "Numerical simulation of thermocapillary-driven flow of a micro vapor bubble on locally heated wall," Proc. the 7th Asian Symp. on Computational Heat Transfer and Fluid Flow (ASCHT2019), Tokyo, Japan, Sep. 3-7 (2019), A122, 2 pages.
  • T. Nimura, T. Kawata, and T. Tsukahara, "Interscale energy transport for turbulent stripe in rotating plane Couette flow," 17th EUROMECH European Turbulence Conf. (ETC17), Torino, Italy, Sep. 3-6 (2019), 545 (1 page).
  • T. Ishida, T. Tsukahara, and N. Tokugawa, "Three-dimensional boundary-layer transition induced by cylindrical roughness: effects of height and diameter," IUTAM Symp. on Laminar-Turbulent Transition (IUTAM transition 2019), London, UK, Sep. 2-6 (2019), Poster C11.
  • T. Kawata and T. Tsukahara, "Numerical investigation on scale-by-scale Reynolds stress transport in plane Couette turbulence," Proc. the 11th Int. Symp. on Turbulence and Shear Flow Phenomena (TSFP11), Southampton, UK, Jul. 30 - Aug. 2 (2019), 6 pages. [Online Proceedings]
  • S. Hara, T. Tsukahara, and Y. Kawaguchi, "Simultaneous measurement of turbulent momentum and mass fluxes in channel flow of viscoelastic fluid," Proc. the 11th Int. Symp. on Turbulence and Shear Flow Phenomena (TSFP11), Southampton, UK, Jul. 30 - Aug. 2 (2019), 6 pages. [Online Proceedings]
  • K. Fujimoto, T. Tsukahara, K. Yamamoto, M. Motosuke, H. Kawamoto, S. Tahara, K. Tanaka, and S. Nakamura, "CFD study of implanted-stent impacts on blood flows in left coronary artery branch models," 36th Educational Program for Young Promising Cardiologists in New Tokyo Hospital—co-operated with BIOTRNIK-Taiwan—, New Tokyo Hospital, Chiba, Japan, Aug. 8-9 (2019). [Invited Talk]
  • K. Ono, K. Yamamoto, T. Tsukahara, H. Kawamoto, S. Tahara, K. Tanaka, S. Nakamura, and M. Motosuke, "Flow measurement in stented left coronary artery models," 36th Educational Program for Young Promising Cardiologists in New Tokyo Hospital—co-operated with BIOTRNIK-Taiwan—, New Tokyo Hospital, Chiba, Japan, Aug. 8-9 (2019). [Invited Talk]
  • A. Nagamachi and T. Tsukahara, "Predictability study of viscoelastic turbulent channel flow using deep learning," Proc. of the ASME-JSME-KSME 2019 8th Joint Fluids Eng. Conf., San Francisco, CA, Jul. 28 - Aug. 1 (2019), AJKFLUIDS2019-5261 (6 pages).
  • K. Fujimoto, T. Tsukahara>, K. Yamamoto, M. Motosuke, H. Kawamoto, S. Tahara, K. Tanaka, and S. Nakamura, "CFD study of implanted-stent impacts on blood flows in left coronary artery branch models," Proc. of the ASME-JSME-KSME 2019 8th Joint Fluids Eng. Conf., San Francisco, CA, Jul. 28 - Aug. 1 (2019), AJKFLUIDS2019-5250 (7 pages).
  • K. Ono, K. Yamamoto, T. Tsukahara, H. Kawamoto, S. Tahara, K. Tanaka, S. Nakamura, and M. Motosuke, "Flow measurement in stented left coronary artery models," Proc. of the ASME-JSME-KSME 2019 8th Joint Fluids Eng. Conf., San Francisco, CA, Jul. 28 - Aug. 1 (2019), AJKFLUIDS2019-5154 (6 pages).
  • M. Hanabusa and T. Tsukahara, "Robustness of turbulent stripes in particle-laden channel flows," Proc. of the ASME-JSME-KSME 2019 8th Joint Fluids Eng. Conf., San Francisco, CA, Jul. 28 - Aug. 1 (2019), AJKFLUIDS2019-5149 (6 pages).
  • T. Tsukahara and T. Fukuda, "Turbulent heat transfer in transitional annular Poiseuille flow," 14th Int. Conf. on Heat Transfer, Fluid Mechanics & Thermodynamics, Wicklow, Ireland, Jul. 22-24 (2019).
  • T. Tsukahara, K. Yamasaki, and I. Ueno, "Basic flows and heat transfer of thermal Marangoni convection in rectangular liquid film," 14th Int. Conf. on Heat Transfer, Fluid Mechanics & Thermodynamics, Wicklow, Ireland, Jul. 22-24 (2019). [Outstanding Paper Award]
  • T. Tsukahara, K. Yamasaki, and I. Ueno, "Basic flows driven by thermal Marangoni effect in rectangular liquid film," 8th Symp. on Bifurcations & Instabilities in Fluid Dyn., Limerick, Ireland, Jul. 16-19 (2019).
  • K. Takeda and T. Tsukahara, "Subcritical transition of plane Poiseuille flow as (2+1)d and (1+1)d DP universality classes," 8th Symp. on Bifurcations & Instabilities in Fluid Dyn., Limerick, Ireland, Jul. 16-19 (2019).


    2018

  • A. Yakeno and T. Tsukahara, "Linear transient growth in transitional turbulent channel flow at low Reynolds number", RIMS Kôkyûroku 2097 "Applied mathematical and physical aspects of inhomogeneous turbulence", pp. 13-17, RIMS, Kyoto University (2018). [Online Journal]
  • K. Nitta and T. Tsukahara, "Direct numerical simulation of the liquid-column manipulation by photoisomerization using OpenFOAM," Proc. of 29th Int. Symp. on Transport Phenomena, Hawaii, USA, Oct. 30 - Nov. 2 (2018), ISTP29-104.
  • K. Yamasaki, T. Tsukahara, I. Ueno, "Numerical simulation of thermocapillary-driven flow in a free rectangular liquid film with varying volume ratios," Proc. of 29th Int. Symp. on Transport Phenomena, Hawaii, USA, Oct. 30 - Nov. 2 (2018), ISTP29-105.
  • K. Fukudome, T. Tsukahara, Y. Ogami, and M. Yamamoto, "Relaminarization of turbulent channel flow under stable density stratification," The 2nd Int. Conf. on Mechanics (ICM2018), Yilan, Taiwan, Oct. 15-18 (2018).
  • T. Fukuda and T. Tsukahara, "Turbulent heat transfer of transitional regime with helical turbulence in annular flow," Proc. of 12th Int. ERCOFTAC Symp. on Eng. Turbulence Modelling and Measurements, Montpellier, France, Sep. 26-28 (2018), 6 pages.
  • K. Oda, T. Tsukahara, S. Jakirlić, and Y. Kawaguchi, "Reynolds-stress model applied to the drag-reducing viscoelastic turbulent flow over backward-facing step," Proc. of 12th Int. ERCOFTAC Symp. on Eng. Turbulence Modelling and Measurements, Montpellier, France, Sep. 26-28 (2018), 6 pages.
  • T. Nimura, T. Kawata, and T. Tsukahara, "Self-sustainability of turbulent stripe in rotating plane Couette flow," 12th Euro. Fluid Mech. Conf., Vienna, Austria, Sep. 9-13 (2018).
  • H. Nakamura, M. Inoue, L. Mu, D. Kondo, T. Ogawa, T. Tsukahara, G. Dietze, H.N. Yoshikawa, F. Zoueshtiagh, T. Kaneko, and I. Ueno, "Numerical simulation of the spreading liquid film subject to the interaction with a spherical particle on the horizontal smooth subst," 12th Euro. Fluid Mech. Conf., Vienna, Austria, Sep. 9-13 (2018).
  • L. Mu, T. Ogawa, H. Nakamura, D. Kondo, H.N. Yoshikawa, F. Zoueshtiagh, G. Dietze, T. Tsukahara, M. Motosuke, T. Kaneko, and I. Ueno, "Experimental study on acceleration of macroscopic contact line of a droplet spreading on a smooth substrate induced by an interactionh a tiny particle," 12th Euro. Fluid Mech. Conf., Vienna, Austria, Sep. 9-13 (2018).
  • Y. Akechi, Y. Yamada, T. Osawa, T. Tsukahara, and Y. Hasegawa, "Flow estimation behind a cylinder using data assimilation," 12th Euro. Fluid Mech. Conf., Vienna, Austria, Sep. 9-13 (2018).
  • Y. Duguet, T. Tsukahara, T. Ishida, and K. Kunii, "Transitional regimes of annular shear flows," 12th Euro. Fluid Mech. Conf., Vienna, Austria, Sep. 9-13 (2018).
  • T. Shimohigashi, T. Tsukahara, and Y. Kawaguchi, "Modeling of the diffusion characteristics of the unsteady plume in quasi-homogeneous turbulence for the estimation of the diffusion source," Proc. of Conf. on Modelling Fluid Flow, Budapest, Hungary, Sep. 4-7 (2018), #40.
  • Y. Duguet, T. Ishida, K. Kunii, and T. Tsukahara, "Spot morphogenesis in annular shear flows," Euromech Colloquium 598 – Coherent Structures in Wall-bounded Turbulence: New Directions in a Classic Problem, London, UK, Aug. 29-31 (2018).
  • Y. Kawabata, S. Hara, T. Tsukahara, and Y. Kawaguchi, "Experimental study on enhancement and recovery of turbulent heat transfer relating to the functionality of surfactant solution induced by inserted mesh," Proc. 16th Int. Heat Transfer Conf., Beijing, China, Aug. 10-15 (2018), 23930.
  • K. Nitta, M. Muto, K. Yamamoto, M. Motosuke, and T. Tsukahara, "Study on an in-tube liquid column driven by photoisomerization using OpenFOAM," Water on Materials Surface 2018, Tokyo, Japan, Jul. 25-27 (2018), C-08.
  • K. Yamasaki, T. Tsukahara, and I. Ueno, "Numerical simulation of the flow patterns induced by thermocapillary effect in a liquid film with varying volume ratios," Water on Materials Surface 2018, Tokyo, Japan, Jul. 25-27 (2018), C-02.
  • T. Tomioka and T. Tsukahara, "DNS of plane Couette flow with roughness in the transitional region," 13th World Cong. on Comput. Mech., New York City, Ny, USA, Jul. 22-27 (2018).
  • M. Hanabusa and T. Tsukahara, "DNS of particle-laden turbulent channel flow in transitional regime," 13th World Cong. on Comput. Mech., New York City, Ny, USA, Jul. 22-27 (2018).
  • K. Fujimoto, T. Tsukahara, Y. Yamada, K. Yamamoto, M. Motosuke, K. Tanaka, S. Tahara, K. Tani, S. Nakamura, and Y. Fujino, "Valuation of implanted-stent impact on coronary artery trifurcation blood flow by using CFD," Proc. of 40th Annu. Int. Conf. of the IEEE Eng. in Medicine and Biology Soc., Honolulu, HI, USA, Jul. 17-21 (2018), 3181-3184.
  • F. Oneyama, T. Tsukahara, Y. Yamada, K. Yamamoto, M. Motosuke, K. Tanaka, S. Tahara, H. Kawamoto, S. Nakamura, and Y. Fujino, "Numerical study of blood flows influenced by a thick-strut stent implanted in left coronary artery bifurcation area," Proc. of 40th Annu. Int. Conf. of the IEEE Eng. in Medicine and Biology Soc., Honolulu, HI, USA, Jul. 17-21 (2018), #3333, FrPos-28.37.
  • S. Hara, K. Ishii, T. Tsukahara, and Y. Kawaguchi, "Appearance of gel-like shear-induced structures and flow modification in turbulent channel flow with dosing of dilute surfactant solution," Proc. of 9th Int. Symp. on Turbulence, Heat and Mass Transfer, Rio de Janeiro, RJ, Brazil, Jul. 10-13 (2018), S21.1 (10 pages).
  • K. Fukudome, T. Tsukahara, and Y. Ogami, "Dissimilarity between heat and momentum transport for the turbulent stripes in transitional plane Couette flow," Proc. of 9th Int. Symp. on Turbulence, Heat and Mass Transfer, Rio de Janeiro, RJ, Brazil, Jul. 10-13 (2018), S1.3 (5 pages).
  • T. Tsukahara, "Deep convolutional neural network for scalar-source estimation in turbulent flow," US-Japan Workshop on Bridging Fluid Mechanics and Data Science, Tokyo University of Science, Tokyo, Japan, Mar. 26-28 (2018). [Invited Talk]
  • T. Tsukahara, "Viscoelastic effects on roll cells in wall-bounded shear flow: Toward clarifications of DR and EIT," Mini-Symposium: Dynamics of Viscoelastic and Inertioelastic Flows, OIST, Okinawa, Japan, Jan. 18-20 (2018). [Invited Talk]


    2017

  • K. Fukudome, T. Tsukahara, and Y. Ogami, "Heat and momentum transfer of the turbulent stripes in plane Couette flows for transitional region," Proc. the 5th Asian Symp. on Computational Heat Transfer & Fluid Flow, Chennai, India, Dec. 10-13 (2017), #263, 4 pages.
  • T. Tsukahara, S. Inoue, S. Jakirlić, and Y. Kawaguchi, "Reynolds stress model for drag-reducing viscoelastic turbulent flow: a simple model for non-linear term in averaged constitutive equation," Proc. the 5th Asian Symp. on Computational Heat Transfer & Fluid Flow, Chennai, India, Dec. 10-13 (2017), #177, 6 pages.
  • K. Yamasaki, T. Tsukahara, and I. Ueno, "Direct numerical simulation of thermocapillary-driven flow in a free liquid film with considering surface deformation," Proc. the 5th Asian Symp. on Computational Heat Transfer & Fluid Flow, Chennai, India, Dec. 10-13 (2017), #129, 6 pages.
  • K. Nitta, M. Muto, K. Yamamoto, M. Motosuke, and T. Tsukahara, "Two-dimensional direct numerical simulation of driving liquid column with photoresponsive surfactant," Proc. the 5th Asian Symp. on Computational Heat Transfer & Fluid Flow, Chennai, India, Dec. 10-13 (2017), #119, 6 pages.
  • R. Tanaka and T. Tsukahara, "DNS of Taylor-Couette flow between counter-rotating cylinders with low radius ratio: Re-dependence and η-dependence," Proc. the 5th Asian Symp. on Computational Heat Transfer & Fluid Flow, Chennai, India, Dec. 10-13 (2017), #114, 6 pages.
  • T. Tsukahara, "Numerical study on spatiotemporally intermittent arrangement of laminar-turbulent coexistence as a DP stochastic process," SFS2017: Int. Symp. on Fluctuation and Structure out of Equilibrium 2017, Sendai, Japan, Nov. 20-23 (2017), PB116.
  • T. Tsukahara, "Photo-induced flows relevant to laser-based droplet manipulations," Optics2017: 8th Int. Conf. and Exhibition on Lasers, Optics & Photonics, Las Vegas, USA, Nov. 15-17 (2017). [Invited Talk]
  • T. Tsukahara, T. Ishida, G. Brethouwer, Y. Duguet, "Laminar-turbulent pattern in plane Couette flow with one roughened wall," Proc. of the 9th JSME-KSME Thermal and Fluids Eng. Conf., Okinawa, Japan, Oct. 27-30 (2017), TFEC9-1640 (5 pages).
  • K. Fukudome, T. Tsukahara, and Y. Ogami, "Heat transfer and flow structure of the turbulent stripes in plane Couette flows for transitional region," Proc. of the 9th JSME-KSME Thermal and Fluids Eng. Conf., Okinawa, Japan, Oct. 27-30 (2017), TFEC9-1520 (4 pages).
  • Y. Akechi, Y. Yamada, T. Osawa, T. Tsukahara, and Y. Hasegawa, "PIV measurement of viscoelastic fluid flow behind a cylinder in a rectangular duct," Proc. of the 9th JSME-KSME Thermal and Fluids Eng. Conf., Okinawa, Japan, Oct. 27-30 (2017), TFEC9-1112 (5 pages).
  • Y. Yamada, T. Tsukahara, and Y. Hasegawa, "DNS study of viscoelastic flow past a confined cylinder," Proc. of the 9th JSME-KSME Thermal and Fluids Eng. Conf., Okinawa, Japan, Oct. 27-30 (2017), TFEC9-1101 (5 pages).
  • K. Takagi, T. Tsukahara, T. Osawa, and Y. Hasegawa, "Experimental observation of micro particle assembly inside evaporating water-ethanol sessile droplet," Proc. of the 9th JSME-KSME Thermal and Fluids Eng. Conf., Okinawa, Japan, Oct. 27-30 (2017), TFEC9-1075 (5 pages).
  • T. Tsukahara and T. Ishida, "Robustness and universality of turbulent stripe," Proc. of the 61st Workshop on Investigation and Control of Transition to Turbulence, Chofu, Japan, Sep. 20-22 (2017), (1 page).
  • S. Inooka and T. Tsukahara, "DNS study on Reynolds-number dependence of spot growth to oblique turbulent band in plane Poiseuille flow," Abstracts of the 16th EUROMECH European Turbulence Conf., Stockholm, Sweden, Aug. 21-24 (2017), No. 29564 (1 page).
  • T. Nimura and T. Tsukahara, "Turbulent band in rotating plane Couette flow of viscoelastic fluid," Abstracts of the 16th EUROMECH European Turbulence Conf., Stockholm, Sweden, Aug. 21-24 (2017), No. 29570 (1 page).
  • T. Matsumoto, S. Hara, T. Tsukahara, and Y. Kawaguchi, "Instantaneous turbulent eddy structure relating to momentum and scalar transport in a drag reducing channel flow with surfactant additives," Proc. of the ASME Fluid Eng. Div. Summer Meeting 2017, Hawaii, USA, July 30 - Aug. 3 (2017), FEDSM2017-69533.
  • S. Onishi, R. Ii, S. Hara, T. Tsukahara, and Y. Kawaguchi, "Large eddy structure appearing in meandering motion of high Reynolds number viscoelastic flow past a backward-facing step," Proc. of the ASME Fluid Eng. Div. Summer Meeting 2017, Hawaii, USA, July 30 - Aug. 3 (2017), FEDSM2017-69558.
  • T. Nimura and T. Tsukahara, "Viscoelastic effect on roll cells in rotating plane Couette flow," Abst. of the 7th Int. Symp. Bifurcations and Instabilities in Fluid Dyn., The Woodlands, USA, July 11-14 (2017).
  • A. Yakeno and T. Tsukahara, "Linear transient growth of coherent structure in turbulent channel flow at low Reynolds number," Proc. of the 10th Int. Symp. on Turbulence and Shear Flow Phenomena, Chicago, USA, July 6-9 (2017), P-21 (6 pages).
  • T. Nimura, T. Ishida, T. Kawata, and T. Tsukahara, "Modulated roll cells in rotating plane Couette flow of viscoelastic fluid," Proc. of the 10th Int. Symp. on Turbulence and Shear Flow Phenomena, Chicago, USA, July 6-9 (2017), 2B-3 (6 pages).
  • S. Hara, S. Onishi, R. Ii, T. Tsukahara, and Y. Kawaguchi, "Analysis of the turbulent kinetic energy budget for meandering motion appearing in a backward-facing step flow of viscoelastic fluid in high Reynolds number," Proc. of the 10th Int. Symp. on Turbulence and Shear Flow Phenomena, Chicago, USA, July 6-9 (2017), 1D-4 (6 pages).


    2016

  • S. Inoue, T. Tsukahara, S. Jakirlić, and Y. Kawaguchi, "A Reynolds stress model for drag-reducing viscoelastic turbulent flow," Proc. of 11th Int. ERCOFTAC Symp. on Engineering Turbulence Modelling and Measurements, Palermo, Italy, Sep. 21-23 (2016), 6 pages.
  • S. Hara, T. Tsukahara, and Y. Kawaguchi, "Experimental investigation on the streamwise velocity fluctuation with the Reynolds-number dependence in turbulent viscoelastic-fluid flows," Proc. of 11th Int. ERCOFTAC Symp. on Engineering Turbulence Modelling and Measurements, Palermo, Italy, Sep. 21-23 (2016), 6 pages.
  • T. Ishida, T. Tsukahara, and S. Inooka, "Investigating the lower critical Reynolds number focusing on the turbulent spot and stripe at plane channel flow," Abst. of 11th European Fluid Mech. Conf. (EFMC11), Seville, Spain, Sep. 12-16 (2016), #429.
  • K. Kunii, T. Ishida, and T. Tsukahara, "Helical turbulence and puff in transitional sliding Couette flow," Abst. 24th Int. Congress of Theor. Appl. Mech. (ICTAM2016), Montreal, Canada, Aug. 21-26 (2016), pp. 929-930.
  • Y. Yamada, T. Tsukahara, M. Motosuke, and Y. Fujino, "CFD analysis of strut influence on blood flow in stent-implanted left main coronary artery bifurcation," Proc. 38th Annu. Int. Conf. the IEEE Eng. in Medicine and Biology Soc., Orlando, FL, USA, Aug. 16-20, 3306-3309.
  • Q.-Q. Shao, Y.-H. Zhang, T. Tsukahara, and Y. Kawaguchi, "Study on the diffusion distance-dependent characteristics of passive scalar plumes in turbulent shear flow," Proc. of 9th Int. Symp. on Heat Transfer, Beijing, China, Aug. 15-19.
  • K. Watanabe, Y. Kaiho, S. Hara, T. Tsukahara, and Y. Kawaguchi, "A study on heat transport phenomena in a developed thermal boundary layer of drag reducing channel flow," Proc. ASME 2016 Fluids Eng. Div. Summer Meeting, Washington DC, USA, July 10-14, FEDSM2016-7680.
  • Y. Kaiho, S. Hara, T. Tsukahara, and Y. Kawaguchi, "Spectral analysis and discussion on the velocity fluctuation in drag reducing channel flow by surfactant additives," Proc. ASME 2016 Fluids Eng. Div. Summer Meeting, Washington DC, USA, July 10-14, FEDSM2016-7725.
  • M. Endo, Q.Q. Shao, T. Tsukahara, and Y. Kawaguchi, "Characteristics of high concentration pulses in turbulent mass diffusion," Proc. ASME 2016 Fluids Eng. Div. Summer Meeting, Washington DC, USA, July 10-14, FEDSM2016-7786.
  • N. Kazuno, T. Tsukahara, and M. Motosuke, "DNS study of a small droplet driven by the thermal Marangoni effect," Abst. 8th Conf. of the International Marangoni Association, Bad Honnef, Germany, Jun. 12-16, p. 55.
  • M. Inoue, N. Kazuno, L.Z. Mu, D. Kondo, T. Tsukahara, T. Kaneko, F. Zoueshtiagh, and I. Ueno, "Direct numerical simulation of dynamic behavior of liquid-gas interface after interaction with particle," Abst. 8th Conf. of the International Marangoni Association, Bad Honnef, Germany, Jun. 12-16, p. 49.
  • S. Hara, R. Ii, T. Tsukahara, and Y. Kawaguchi, "Heat transfer enhancement caused by the meandering motion appearing in the backward-facing step flow with surfactant additives in high Reynolds number," Proc. the First Pacific-Rim Thermal Engineering Conf., Hawaii's Big Island, USA, Mar. 13-17, PRTEC-14998, 5 pages.
  • M. Endo, Q.-Q. Shao, T. Tsukahara, and Y. Kawaguchi, "Study on the diffusion mechanism and the formation process of the high concentration pulse in material turbulent diffusion with the conditional sampling technique," Proc. the First Pacific-Rim Thermal Engineering Conf., Hawaii's Big Island, USA, Mar. 13-17, PRTEC-15123, 5 pages.


    2015

  • W. Sekiguchi, D. Cerizza, T. Tsukahara, and Y. Hasegawa, "Estimation of scalar source strength based on sensor information by adjoint analysis in turbulence," Proc. the 5th Asian Symp. on Computational Heat Transfer & Fluid Flow, Busan, Korea, Nov. 22-25, ASCHT15-Mon04-013, 5 pages.
  • N. Kazuno, Y. Miyazaki, T. Tsukahara, and I. Ueno, "Numerical study on dynamics behavior of contact line moving on small-particle surface," Proc. the 5th Asian Symp. on Computational Heat Transfer & Fluid Flow, Busan, Korea, Nov. 22-25, ASCHT15-Mon07-004, 5 pages.
  • S. Inoue, T. Tsukahara, S. Jakirlić, and Y. Kawaguchi, "A Reynolds-stress model for turbulent flow of a drag-reducing viscoelastic fluid," Proc. the 5th Asian Symp. on Computational Heat Transfer & Fluid Flow, Busan, Korea, Nov. 22-25, ASCHT15-Wed02-004, 5 pages.
  • H. Tatematsu, T. Ishida, and T. Tsukahara, "Structures in laminar plane Couette flows destabilized by system rotation," Proc. the 5th Asian Symp. on Computational Heat Transfer & Fluid Flow, Busan, Korea, Nov. 22-25, , ASCHT15-Mon05-007, 5 pages.
  • A. Ikegami, T. Tsukahara, and Y. Kawaguchi, "Viscoelastic stress field in turbulent flow behind backward-facing step," Proc. the 5th Asian Symp. on Computational Heat Transfer & Fluid Flow, Busan, Korea, Nov. 22-25, ASCHT15-Mon04-006, 4 pages.
  • T. Ishida and T. Tsukahara, "Turbulent annular pipe flow in subcritical transition regime: Numerical study on heat transfer," Proc. the 5th Asian Symp. on Computational Heat Transfer & Fluid Flow, Busan, Korea, Nov. 22-25, ASCHT15-Mon04-009, 4 pages.
  • Z. Fu, T. Tsukahara, and Y. Kawaguchi, "Diffusion of the injected viscoelastic polymer solution in a channel flow associated with evolution of eddy structure," Proc. Int. Symp. on Rheology, Kobe, Japan, Sep. 23-25.
  • D. Cerizza, W. Sekiguchi, T. Tsukahara, and Y. Hasegawa, "Reconstruction of time-varying scalar source intensity based on sensing signal in turbulent channel flow," Proc. the 8th Int. Symp. on Turbulence, Heat and Mass Transfer, Sarajevo, Bosnia and Herzegovina, Sep. 15-18.
  • K. Watanabe, Y. Kaiho, S. Hara, T. Tsukahara, and Y. Kawaguchi, " Temperature fluctuation appearing in bilayered thermal boundary in drag-reducing surfactant solution flow," Proc. the 8th Int. Symp. on Turbulence, Heat and Mass Transfer, Sarajevo, Bosnia and Herzegovina, Sep. 15-18.
  • S. Hara, R. Ii, T. Tsukahara, and Y. Kawaguchi, "Analysis of organized turbulent structure by pattern recognition technique in drag-reducing surfactant solution flow in a channel," Proc. the 8th Int. Symp. on Turbulence, Heat and Mass Transfer, Sarajevo, Bosnia and Herzegovina, Sep. 15-18.
  • T. Ishida, T. Tsukahara, "Turbulent annular pipe flow in subcritical transition regime: effect of radius ratio on structures," Proc. the 15th EUROMECH European Turbulence Conf., Delft, The Netherlands, Aug. 25-28, No. 82, 2 pages.
  • T. Ishida and T. Tsukahara, "Turbulent annular pipe flow in subcritical transition regime: Direct numerical simulation of a large domain," Proc. the ASME-JSME-KSME Joint Fluids Eng. Conf. 2015, Seoul, Korea, July 26-31, AJKFluids2015-15472, 4 pages.
  • M. Endo, T. Tsukahara, and Y. Kawaguchi, "Relationship between diffusing-material lumps and organized structures in turbulent flow," Proc. the ASME-JSME-KSME Joint Fluids Eng. Conf. 2015, Seoul, Korea, July 26-31, AJKFluids2015-24432, 7 pages.
  • A. Ikegami, T. Tsukahara, and Y. Kawaguchi, "Influence of viscoelasticity on turbulent flow over a backward-facing step," Proc. the ASME-JSME-KSME Joint Fluids Eng. Conf. 2015, Seoul, Korea, July 26-31, AJKFluids2015-25251, 4 pages.
  • H. Sugioka, Z. Fu, T. Tsukahara, and Y. Kawaguchi, "PIV-PLIF experiment on modification of turbulent scalar diffusion near wall by uniform blowing," Proc. the ASME-JSME-KSME Joint Fluids Eng. Conf. 2015, Seoul, Korea, July 26-31, AJKFluids2015-25431, 6 pages.
  • Y. Kawaguchi and T. Tsukahara, "Modification of coherent eddy structure near the wall by polymer dosing from the wall," Proc. the ASME-JSME-KSME Joint Fluids Eng. Conf. 2015, Seoul, Korea, July 26-31, AJKFluids2015-25817, 1 pages.
  • Y. Sugawara, T. Tsukahara, and Y. Kawaguchi, "Multidimensional measurements of turbulent boundary layer including scattered particles using PIV technique," Proc. the ASME-JSME-KSME Joint Fluids Eng. Conf. 2015, Seoul, Korea, July 26-31, AJKFluids2015-32390, 6 pages.
  • T. Ishida and T. Tsukahara, "Turbulent annular pipe flow in subcritical transition regime: Occurence of helical turbulent band," Abstract of the 6th Int. Symp. on Bifurcations and Instabilities in Fluid Dyn., Paris, France, July 15-17, p. 349.
  • T. Ishida and T. Tsukahara, "Numerical investigation of high rotation effects on laminar flow in rotating plane Couette flow," Abstract of the 19th Int. Couette-Taylor Workshop, Cottbus, Germany, June 22-24, pp. 52-53.
  • R. Ii, S. Hara, T. Tsukahara, and Y. Kawaguchi, "Turbulence modulation and instability induced by surfactant additives in backward-facing step flow," Proc. the 9th Int. Symp. on Turbulence and Shear Flow Phenomena, Melbourne, Australia, June 30 - July 3, 6 pages.
  • D. Sekine, T. Tsukahara, and Y. Kawaguchi, "Study on graphical statistics characterizing a turbulent scalar diffusion toward the source estimation via image processing," Proc. the 9th Int. Symp. on Turbulence and Shear Flow Phenomena, Melbourne, Australia, June 30 - July 3, 6 pages.


    2014

  • T. Ishida and T. Tsukahara, "Critical Reynolds number for global instability of channel flow in subcritical scenario," 67th Annual Meeting of the Division of Fluid Dynamics, San Francisco, CA, USA, Nov. 23-25 (2014).
  • Y. Miyazaki, T. Tsukahara, and I. Ueno, "Numerical study of dynamic behavior of contact line approaching a micro-scale particle," 67th Annual Meeting of the Division of Fluid Dynamics, San Francisco, CA, USA, Nov. 23-25 (2014).
  • J. Hasegawa, T. Tsukahara, and Y. Kawaguchi, "Extraction of characteristic quantities of turbulent diffusion towards the source estimation," Proc. of the 25th Int. Symp. on Transport Phenomena, Krabi, Thailand, Nov. 5-7, 2014, 6 pages.
  • R. Ikeno, T. Tsukahara, and Y. Kawaguchi, "DNS study of influences of roughness shapes and parameters on friction coefficient," Proc. the 25th Int. Symp. on Transport Phenomena, Krabi, Thailand, Nov. 5-7, 2014, 5 pages.
  • T. Tsukahara, "Viscoelastic and elasto-inertial turbulence in roughened/smooth channel flow," KTH Mechanics Seminars, KTH, Stockholm, Sweden, Sep. 22. [Invited Talk]
  • M. Takahashi, T. Tsukahara, and Y. Kawaguchi, "Application of non-linear k-ε model to viscoelastic fluid flow," Proc. 10th Int. ERCOFTAC Symp. on Engineering Turbulence Modelling and Measurements, Marbella, Spain, Sep. 17-19, 2014, 7 pages.
  • R. Goto, Z. Fu, T. Tsukahara, and Y. Kawaguchi, "Near wall turbulent structure in drag-reducing channel flow with polymer dosing from the wall," Proc. 10th Int. ERCOFTAC Symp. on Engineering Turbulence Modelling and Measurements, Marbella, Spain, Sep. 17-19, 2014, 8 pages.
  • S. Hara, S. Kawada, T. Tsukahara, and Y. Kawaguchi, "Operation of functional fluid by local wall heating in a drag-reducing surfactant solution flow," Proc. the 15th Int. Heat Transfer Conf., Kyoto, Japan, Aug. 10-15, 2014, IHTC15-9676.
  • T. Minegishi, T. Tsukahara, and Y. Kawaguchi, "Stress field analysis around vortex in elastic layer of viscoelastic turbulent channel flow," J. Phys.: Conf. Ser., Vol. 530, XXI Fluid Mech. Conf. (KKMP2014), Krakow, Poland, Jun. 15-18, 2014, 012059 (7 pages). [Online Journal (Open Access)]
  • T. Tsukahara and T. Ishida, "The lower bound of subcritical transition in plane Poiseuille flow," Euromech Colloquium EC565 – Subcritical Transition to Turbulence, Corsica, France, May 6-9, 2014.


    2013

  • R. Ikeno, T. Tsukahara and Y. Kawaguchi, "Effects of three-dimensional prisms on Taylor-Couette flow ," Proc. 12th Int. Symp. on Fluid Control, Measurements, and Visualization, Nara, Japan, Nov. 18-23, 2013, OS16-1-2.
  • T. Tsukahara and Y. Kawaguchi, "Flow visualization experiment on elasto-inertial turbulence in transitional channel flow," Proc. 12th Int. Symp. on Fluid Control, Measurements, and Visualization, Nara, Japan, Nov. 18-23, 2013, OS8-4-3.
  • M. Tanabe, T. Tsukahara and Y. Kawaguchi, "DNS study on vortices induced by flat-plate vortex generator in drag-reducing turbulent flow," Proc. 12th Int. Symp. on Fluid Control, Measurements, and Visualization, Nara, Japan, Nov. 18-23, 2013, OS8-4-4.
  • J. Hasegawa, K. Oyagi, T. Tsukahara, and Y. Kawaguchi, "DNS of turbulent diffusion towards the estimation of emission source," Proc. 24th Int. Symp. on Transport Phenomena, Yamaguchi, Japan, Nov. 1-5, 2013.
  • K. Sugiyama, K. Otakeguchi, T. Tsukahara, and Y. Kawaguchi, "Investigation of turbulent modulation in horizontal particle laden boundary-layer gas flow by using PIV," Proc. 24th Int. Symp. on Transport Phenomena, Yamaguchi, Japan, Nov. 1-5, 2013.
  • T. Tsukahara, T. Ishida, and Y. Duguet, "Turbulent-spot development in constant-mass-flux channel flow," The 14th EUROMECH Euro. Turbulence Conf., Lyon, France, Sep. 1-4, 2013.
  • T. Ishida, T. Tsukahara, and Y. Kawaguchi, "Relationship between statistics and turbulent structures in rotating plane Poiseuille flow," The 14th EUROMECH Euro. Turbulence Conf., Lyon, France, Sep. 1-4, 2013.
  • T. Ishida, T. Tsukahara, and Y. Kawaguchi, "Effects of spanwise rotation on the structure of turbulent stripe in plane Poiseuille flow," Proc. 8th Int. Symp. on Turbulence and Shear Flow Phenomena, Poitiers, France, Aug. 28-30, 2013, ROTB2.
  • K. Oyagi, T. Tsukahara, and Y. Kawaguchi, "Characteristics extraction of a turbulent diffusion state for quick trace-back estimation of the diffusion source," Proc. 8th Int. Symp. on Turbulence and Shear Flow Phenomena, Poitiers, France, Aug. 28-30, 2013, PSB2.
  • Y. Iwaki, M. Motozawa, T. Tsukahara, and Y. Kawaguchi, "Modification of drag-reduced flow by dosing water from the wall: Investigation of turbulent structure by PIV," Proc. 8th Int. Symp. on Turbulence and Shear Flow Phenomena, Poitiers, France, Aug. 28-30, 2013, P06.
  • K. Oyagi, T. Tsukahara, and Y. Kawaguchi, "Experimental consideration for the map based source estimation of concentration diffusion in turbulent flow," Proc. 8th World Conf. on Exp. Heat Transfer, Fluid Mech., and Thermodyn., Lisbon, Portugal, Jun. 16-20, 2013, Turbulence-259.
  • Y. Iwaki, M. Motozawa, T. Tsukahara, and Y. Kawaguchi, "Enhanced drag reduction in surfactant flow by dosing water from wall: investigation of turbulent statistics by PIV and PLIF," Proc. 8th World Conf. on Exp. Heat Transfer, Fluid Mech., and Thermodyn., Lisbon, Portugal, Jun. 16-20, 2013, Turbulence-453.
  • S. Kawada, T. Tsukahara, and Y. Kawaguchi, "Investigation on functionality of surfactant solution in turbulent heat transfer downstream of orifice," Proc. 8th World Conf. on Exp. Heat Transfer, Fluid Mech., and Thermodyn., Lisbon, Portugal, Jun. 16-20, 2013, Turbulence-272.
  • T. Minegishi, T. Tsukahara, and Y. Kawaguchi, "Budget of constitutive stress in viscoelastic turbulent channel flow by DNS," Proc. 4th Asian Symp. on Comput. Heat Transfer & Fluid Flow, Hong Kong, Jun. 3-6, 2013, ASCHT0168.
  • M. Takahashi, T. Tsukahara, and Y. Kawaguchi, "Improvement of low Reynolds number k-ε model for viscoelastic fluid flow," Proc. 4th Asian Symp. on Comput. Heat Transfer & Fluid Flow, Hong Kong, Jun. 3-6, 2013, ASCHT0167.
  • Y. Miyazaki, T. Tsukahara, and Y. Kawaguchi, "Four-way coupling simulation of particle-laden two-phase flow by immersed boundary method," Proc. 4th Asian Symp. on Comput. Heat Transfer & Fluid Flow, Hong Kong, Jun. 3-6, 2013, ASCHT0166.
  • T. Ishida, T. Tsukahara, and Y. Kawaguchi, "Alterations of large-scale structures in transitional rotating plane Poiseuille flow," Proc. 4th Asian Symp. on Comput. Heat Transfer & Fluid Flow, Hong Kong, Jun. 3-6, 2013, ASCHT0143.
  • M. Tanabe, T. Tsukahara, and Y. Kawaguchi, "Viscoelastic turbulent channel flow obstructed with three-dimensional finite ribs," Proc. 4th Asian Symp. on Comput. Heat Transfer & Fluid Flow, Hong Kong, Jun. 3-6, 2013, ASCHT0141.


    2004-2012

  • S. Kawada, D. Tsurumi, T. Tsukahara, and Y. Kawaguchi, "Experimental study on heat transfer augmentation in viscoelastic turbulent channel flow by two-dimensional orifice," Proc. 7th Int. Symp. on Turbulence, Heat & Mass Transfer, Palermo, Italy, Sep. 24-27 (2012), 1013-1016.
  • D. Tsurumi, S. Kawada, T. Kawase, T. Tsukahara, and Y. Kawaguchi, "Experimental analysis of turbulent structure of viscoelastic fluid flow in downstream of two-dimensional orifice," Proc. 7th Int. Symp. on Turbulence, Heat & Mass Transfer, Palermo, Italy, Sep. 24-27 (2012), 191-194.
  • T. Tsukahara, M. Motozawa, T. Kawase, D. Tsurumi, and Y. Kawaguchi, "PIV and DNS analysis of viscoelastic turbulent flows behind a rectangular orifice," Proc. 9th Int. ERCOFTAC Symp. on Eng. Turbulence Modelling and Measurements, Thessaloniki, Greece, June 6-8 (2012), 0041, 6pp.
  • T. Tsukahara, "Structures and turbulent statistics in a rotating plane Couette flow," J. Phys.: Conf. Ser. 318, 13th EUROMECH Euro. Turbulence Conf., Warsaw, Poland, Sep. 12-15 (2011), 022024, 11pp. [Online Journal]
  • K. Ohnishi, T. Tsukahara, and Y. Kawaguchi, "Turbulence budget in transitional plane Couette flow with turbulent stripe," J. Phys.: Conf. Ser. 318, 13th EUROMECH Euro. Turbulence Conf., Warsaw, Poland, Sep. 12-15 (2011), 032033, 11pp. [Online Journal]
  • H. Aida, T. Tsukahara, and Y. Kawaguchi, "Development process of a turbulent spot into stripe pattern in plane Poiseuille flow," Proc. 7th Int. Symp. on Turbulence and Shear Flow Phenomena, Ottawa, Canada, July 28-31 (2011), Paper-ID #8D2P (USB), 6 pp.
  • H. Kawamoto, T. Tsukahara, H. Kawamura, and Y. Kawaguchi, "Proposal of k-ε model for visco-elastic fluid flow: toward prediction of drag-reducing turbulence," Proc. 8th Int. ERCOFTAC Symp. on Eng. Turbulence Modelling and Measurements, Marseille, France, June 9-11 (2010), Vol. 2, pp. 350-355.
  • T. Kawase, T. Tsukahara, and Y. Kawaguchi, "DNS of viscoelastic turbulent channel flow with two-dimensional slits," Proc. 8th Int. ERCOFTAC Symp. on Eng. Turbulence Modelling and Measurements, Marseille, France, June 9-11 (2010), Vol. 3, pp. 732-737.
  • Y. Sakamoto, S. Shimazu, T. Tsukahara, M. Yamamoto, and Y. Kawaguchi, "Control of sand movement on model dune by fence installation – Experimental study using LDV," Proc. 6th Int. Symp. on Turbulence, Heat & Mass Transfer, Rome, Italy, Sep. 14-18 (2009), pp. 901-904.
  • S. Hashimoto, A. Hasobe, T. Tsukahara, Y. Kawaguchi, and H. Kawamura, "An experimental study on turbulent-stripe structure in transitional channel flow," Proc. 6th Int. Symp. on Turbulence, Heat & Mass Transfer, Rome, Italy, Sep. 14-18 (2009), 10 pages. [Online Journal] [arXiv]
  • T. Tsukahara, Y. Kawaguchi, and H. Kawamura, "DNS of turbulent plane Couette flow with emphasis on turbulent stripe," Advances in Turbulence XII, Proc. 12th EUROMECH European Turbulence Conf., Marburg, Germany, Sep. 7-10 (2009), pp. 71-74. [Online Journal]
  • T. Ishigami, T. Tsukahara, and Y. Kawaguchi, "DNS study on 'diameter effect' of drag reduction in viscoelastic-fluid flow," Advances in Turbulence XII, Proc. 12th EUROMECH European Turbulence Conf., Marburg, Germany, Sep. 7-10 (2009), pp. 363-366. [Online Journal]
  • T. Ishigami, T. Tsukahara, Y. Kawaguchi, and B. Yu, "DNS Study on viscoelastic effect in drag-reduced turbulent channel flow," Proc. 6th Int. Symp. on Turbulence and Shear Flow Phenomena, Seoul, Korea, Jun. 22-24 (2009), pp. 359-364.
  • T. Tsukahara, Y. Kawaguchi, H. Kawamura, N. Tillmark, and P.H. Alfredsson, "Turbulence stripe in transitional channel flow with/without system rotation," Proc. 7th IUTAM Symp. on Laminar-Turbulent Transition, Stockholm, Sweden, June 23-26 2009, Springer (2010), pp. 421-426. [Online Book]
  • K. Iwamoto, T. Tsukahara, H. Nakano, and H. Kawamura, "Effect of large-scale structures upon near-wall turbulence," Proc. IUTAM Symp. on Comput. Phys. and New Perspectives in Turbulence, Nagoya, Japan, Sep. 11-14 2006, Springer (2007), pp. 55-60. [Online Book]
  • T. Tsukahara, K. Iwamoto and H. Kawamura, "POD analysis of large-scale structures through DNS of turbulent plane Couette flow," Advances in Turbulence XI, Proc. 11th EUROMECH Euro. Turbulence Conf., Porto, Portugal, June 25-28 (2007), pp. 245-247. [PDF (0.3MB)]
  • T. Tsukahara, K. Iwamoto, H. Kawamura, and T. Takeda, "DNS of heat transfer in a transitional channel flow accompanied by a turbulent puff-like structure," Proc. 5th Int. Symp. on Turbulence, Heat & Mass Transfer, Dubrovnik, Croatia, Sep. 25-29 (2006), pp. 193-196. [PDF (short paper 1.1MB), (full paper 6.4MB)] [arXiv]
  • T. Tsukahara, Y. Seki, H. Kawamura, and D. Tochio, "DNS of turbulent channel flow at very low Reynolds numbers," Proc. 4th Int. Symp. on Turbulence and Shear Flow Phenomena, Williamsburg, VA, USA, Jun. 27-29 (2005), pp. 935-940. [PDF(1.1MB)] [arXiv]
  • T. Tsukahara, H. Kawamura, and K. Shingai, "DNS of turbulent Couette flow with respect to a large scale structure in the core region," Advances in Turbulence X, Proc. 10th EUROMECH Euro. Turbulence Conf., Trondheim, Norway, Jun. 29 - Jul. 2 (2004), pp. 611-614. [PDF(2.0MB)]