ニュートン流体・粘弾性流体の壁面せん断流の遷移過程

 

氏名:1塚原 隆裕,1河田 卓也,2國井 康平,2猪岡 翔,2山田 裕也,2高木 健吾,2明智 ゆき,2田中 椋,2仁村 友洋,2山崎 広哉,2新田 圭,2冨岡 武,1平戸 健介,1柳沢 高広,1福田 雄大

所属:1東京理科大学理工学部機械工学科,2東京理科大学大学院理工学研究科機械工学専攻

概要: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.

 

論文掲載,発表実績:
(学術雑誌掲載論文)

  • T. Ishida, Y. Duguet, T. Tsukahara, “Turbulent bifurcations in intermittent shear flows: from puffs to oblique stripes,” Physical Review Fluids, Vol. 2, 073902, July 2017.
  • T. Ishida, G. Brethouwer, Y. Duguet, T. Tsukahara, “Laminar-turbulent patterns with rough walls,” Physical Review Fluids, Vol. 2, 073901, July 2017.

 

(国際会議会議録掲載論文)

  • T. Nimura, T. Ishida, T. Kawata, and T. Tsukahara, “Modulated roll cells in rotating plane Couette flow of viscoelastic fluid,” In: Proceedings of the 10th International Symposium on Turbulence and Shear Flow Phenomena, Chicago, USA, 2B-3 (6 pages), July 2017.
  • T. Nimura, T. Tsukahara, “Viscoelastic effect on roll cells in rotating plane Couette flow,” The 7th International Symposium Bifurcations and Instabilities in Fluid Dynamics, The Woodlands, TX, USA, July 2017.
  • 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,” In: Proceedings of the 6th Asian Symposium on Computational Heat Transfer and Fluid Flow, Chennai, India, #177, 6 pages, Dec. 2017.
  • R. Tanaka and T. Tsukahara, “DNS of Taylor-Couette flow between counter-rotating cylinders with low radius ratio: Re-dependence and η-dependence,” In: Proceedings of the 6th Asian Symposium on Computational Heat Transfer and Fluid Flow, Chennai, India, #114, 6 pages, Dec. 2017.
  • T. Tsukahara, “Numerical study on spatiotemporally intermittent arrangement of laminar-turbulent coexistence as a DP stochastic process,” In: Abstract of International Symposium on Fluctuation and Structure out of Equilibrium 2017 (SFS2017), Sendai, Japan, PB116, Nov. 2017.
  • T. Tsukahara, T. Ishida, G. Brethouwer, Y. Duguet, “Laminar-turbulent pattern in plane Couette flow with one roughened wall,” In: Proceedings of the Ninth JSME-KSME Thermal and Fluids Engineering Conference, Okinawa, Japan, TFEC9-1640 (USB), 5 pp, Oct. 2017.
  • Y. Yamada, T. Tsukahara, and Y. Hasegawa, “DNS study of viscoelastic flow past a confined cylinder,” In: Proceedings of the Ninth JSME-KSME Thermal and Fluids Engineering Conference, Okinawa, Japan, TFEC9-1101 (USB), 5 pp, Oct. 2017.
  • S. Inooka and T. Tsukahara, “DNS study on Reynolds-number dependence of spot growth to oblique turbulent band in plane Poiseuille flow,” In: Abstracts of the 16th EUROMECH European Turbulence Conference, Stockholm, Sweden, No. 29564 (1 page), Aug. 2017.
  • T. Nimura and T. Tsukahara, “Turbulent band in rotating plane Couette flow of viscoelastic fluid,” In: Abstracts of the 16th EUROMECH European Turbulence Conference, Stockholm, Sweden, No. 29570 (1 page), Aug. 2017.

 
(国内研究会等発表論文)

  • 河田卓也,塚原隆裕,“ミニマル領域を用いた平面クエット乱流の直接数値解析”,日本流体力学会年会2017講演論文集,東京,#210,4 pages,Aug. 2017.
  • 田中椋,塚原隆裕,“低円筒比の対向回転テイラークエット流の直接数値解析:Re依存性とη依存性”,日本流体力学会年会2017講演論文集,東京,#206,5 pages,Aug. 2017.
  • 塚原隆裕,石田貴大,Duguet Yohann,“環状チャネル流の局在乱流パターニング:円管とチャネルのホモトピー”,日本流体力学会年会2017講演論文集,東京,#205,3 pages,Aug. 2017.
  • 仁村友洋,河田卓也,塚原隆裕,“回転平面クエット流中のロールセルに対する粘弾性応答のDNS解析”,日本流体力学会年会2017講演論文集,東京,#220,2 pages,Aug. 2017.

 




Posted : 2018年03月01日