Authors：Takahiro TSUKAHARA¹, Takuya KAWATA¹, Hirotaka MORIMATSU¹, Shunsuke FUJIMURA¹, Kazuki TAKEDA¹, Yuki AKECHI², Ryo TANAKA², Tomohiro NIMURA², Hiroya YAMASAKI², Kei NITTA², Takeru TOMIOKA², Takehiro FUKUDA², Masaki HANABUSA²

Affiliation：¹Department of Mechanical Engineering, Tokyo University of Science, ²Department of Mechanical Engineering, Tokyo University of Science

Abstract：壁面せん断流の亜臨界乱流遷移において，その遷移過程と発現構造は複雑で，理論的アプローチが困難である．特に，ポリマー溶液などの粘弾性流体という非ニュートン流体となれば，ポリマー応力などの付加的応力やレオロジー特性時間（緩和時間）に依存してより複雑な遷移過程を呈する．本研究では，Giesekus粘弾性モデル流体流れの直接数値シミュレーションを行い，低レイノルズ数下での粘弾性による流動構造の変化や（ニュートン流体を含む）乱流遷移過程の変化を調査した．今年度は他に，テイラークエット流や，分散性粒子を含む固液二相流，OpenFOAMを用いた気液界面を含むミリスケール液滴・液膜の解析などを行った．

Publication related to your research
（Journal paper）

• R. Tanaka, T. Kawata, and T. Tsukahara, “DNS of Taylor-Couette flow between counter-rotating cylinders at small radius ratio,” International Journal of Advances in Engineering Sciences and Applied Mathematics, Vol. 10, Issue 2 (2018), 159-170.
• T. Nimura, T. Kawata, and T. Tsukahara, “Viscoelastic effect on steady wavy roll cells in wall-bounded shear flow,” Fluid Dynamics Research, Vol. 50, No. 5 (2018), 051414.
• T. Nimura, T. Kawata, and T. Tsukahara, “Viscoelasticity-induced pulsatile motion of 2D roll cell in laminar wall-bounded shear flow,” International Journal of Heat and Fluid Flow, Vol. 74 (2018), 65-75.
• T. Tsukahara, T. Tomioka, T. Ishida, Y. Duguet, and G. Brethouwer, “Transverse turbulent bands in rough plane Couette flow,” Journal of Fluid Science and Technology, Vol. 13, Issue 3 (2018), JFST0019.
• K. Nitta and T. Tsukahara, "Numerical demonstration of in-tube liquid-column migration driven by photoisomerization," Micromachines, Vol. 9, No. 10 (2018), 533.

 

（International conference paper）

• K. Nitta and T. Tsukahara, "Direct numerical simulation of the liquid-column manipulation by photoisomerization using OpenFOAM," In: Proceedings of the 29th International Symposium on Transport Phenomena, Hawaii, USA, Oct. 30 - Nov. 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," In: Proceedings of the 29th International Symposium on Transport Phenomena, Hawaii, USA, Oct. 30 - Nov. 2018, ISTP29-105.
• T. Fukuda and T. Tsukahara, "Turbulent heat transfer of transitional regime with large-scale intermittent structure in annular flow," In: Proceedings of 12th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Measurements, Montpellier, France, Sep. 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," In: Proceedings of 12th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Measurements, Montpellier, France, Sep. 2018, 6 pages.

 

（Domestic conference/workshop）

• 新田圭，塚原隆裕，“光異性化による円管内液体駆動現象の直接数値解析”，第96期日本機械学会流体工学部門講演会 講演論文集，室蘭，Nov. 2018，OS2-24，4 pages．
• 山崎広哉，塚原隆裕，上野一郎，“液膜体積比に依存した液膜マランゴニ対流の数値解析”，第96期日本機械学会流体工学部門講演会 講演論文集，室蘭，Nov. 2018，OS2-6，2 pages．
• 小田和希，塚原隆裕，川口靖夫，“粘弾性流体バックステップ乱流における応力方程式モデルの検証”，第96期日本機械学会流体工学部門講演会 講演論文集，室蘭，Nov. 2018，OS1-5，4 pages．
• 長町厚志，塚原隆裕，“深層学習による粘弾性流体乱流の予測可能性に関する調査”，日本機械学会第31回計算力学講演会 講演論文集，徳島，Nov. 2018，033，4 pages．
• 花房真輝，塚原隆裕，“固体粒子を含むチャネル流における乱流縞構造安定性に関する研究”，日本流体力学会年会2018 講演論文集，大阪，Sep. 2018，4 pages.
• 福田雄大，塚原隆裕，“環状ポアズイユ流における大規模間欠構造を伴う遷移域の乱流熱伝達”，第55回日本伝熱シンポジウム 講演論文集，札幌，May 2018，P142, 6 pages.

 

（Etc）

• 塚原隆裕，國井康平，石田貴大，Y. Duguet，“環状クエット流における層流―乱流共存場”，第64回「乱流遷移の解明と制御」研究会，東京，Mar. 2019.
• 仁村友洋，河田卓也，塚原隆裕，“乱流縞の維持機構：コリオリ安定効果を与えて”，第63回「乱流遷移の解明と制御」研究会，野田，Oct. 2018.
• T. Nimura, T. Kawata, and T. Tsukahara, "Self-sustainability of turbulent stripe in rotating plane Couette flow," 12th European Fluid Mechanics Conference (EFMC12), Vienna, Austria, Sep. 2018.
• Y. Duguet, T. Tsukahara, T. Ishida, and K. Kunii, "Transitional regimes of annular shear flows," 12th European Fluid Mechanics Conference (EFMC12), Vienna, Austria, Sep. 2018.
• Y. Duguet, T. Ishida, K. Kunii, and T. Tsukahara, "Spot morphogenesis in annular shear flows," Euromech Colloquium EC598 – Coherent Structures in Wall-bounded Turbulence: New Directions in a Classic Problem, London, UK, Aug. 2018.
• 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 (WMS2018), Tokyo, Japan, Jul. 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 (WMS2018), Tokyo, Japan, Jul. 2018, C-02.
• T. Tomioka and T. Tsukahara, "DNS of plane Couette flow with roughness in the transitional region," In: Abstract of 13th World Congress on Computational Mechanics (WCCM13), New York City, Ny, USA, Jul. 2018.
• M. Hanabusa and T. Tsukahara, "DNS of particle-laden turbulent channel flow in transitional regime," In: Abstract of 13th World Congress on Computational Mechanics (WCCM13), New York City, Ny, USA, Jul. 2018.
• 仁村友洋，河田卓也，塚原隆裕，“粘弾性流体の回転平面クエット流における縦渦のカオス化過程”，第20回複雑流体研究会，京都，Jun. 2018.