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田川 俊夫

田川 俊夫
氏 名田川 俊夫 (TAGAWA Toshio)
博士(工学)
職 位准教授
E-Mail tagawa-toshio@tmu.ac.jp
研究室HPhttp://www.aerospace.sd.tmu.ac.jp/hydrodynamics/別ウィンドウ

担当科目

  • 基礎ゼミナール
  • 流体力学2
  • 数値流体力学1
  • 数値流体力学演習
  • 数値流体力学特論(大学院)

研究室紹介

本研究室では,複雑な流れの諸現象(混相流、移動境界問題、乱流、圧縮性流れなど)の解明とその制御を目指して、流体現象の数値シミュレーションや流れ場と電磁場の相互作用に関する基礎研究を行っています.対象は,電磁流体,気泡・液滴などの二相流,自然対流,マランゴニ対流,回転流など様々であり,主として数値解析的に取り組んでいますが,同時にまた理論的あるいは実験的手法を用いて解析結果の妥当性や精度を検証しています.2014年7月現在、M2生2名、M1生4名、4年生4名が在籍しています.身近な流れ現象を不思議に思う人、GPU流体計算に興味がある人、超伝導電磁石に興味のある人は本研究室へ来てください.熱意のある学生が大勢来てくれるのを期待しています.

研究内容

最近行っている主な研究課題は次の通りです.

1.  移動物体と流れの相互作用問題 

2.  水の波,液滴・気泡のダイナミクス 

3.  誘導方程式の数値解法(地球ダイナモ問題、電磁ポンプ、液滴電磁浮遊法への適用 )

4.  ハルトマン境界層理論とその数値解法 

5.  自然対流

6.  表面張力対流 

7.  回転流体の安定性

8.  磁気力を用いた浮力対流および二相流の制御

 
下図は、円柱の後方に生じるカルマン渦列の数値解析例を示しています.

円柱後方に生じるカルマン渦列の可視化の一例
円柱後方に生じるカルマン渦列の可視化の一例.
渦度(上),水平方向速度成分と速度ベクトル(下).

最近の発表論文

・Kitayama, T. and Tagawa, T., “Effect of the electric conductivity and Seebeck coefficient of the rods on the oscillatory Marangoni convection in the presence of a uniform axial magnetic field”, Nihon Kikai Gakkai Ronbunshu/Transactions of the Japan Society of Mechanical Engineers, (2017).
・Tagawa, T. "Effect of wall conductivity on an electric conducting fluid flow between rotating and stationary coaxial disks in the presence of a uniform axial magnetic field," Fluid Mechanics, Volume 2, Issue 2, pp. 13-27, (2016).
・Tagawa, T., Anzai, Y. and Kumagai, T. "Numerical analyses of single rising bubble in a viscous fluid in an enclosure," Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 101(2), pp. 101-108, (2015).
・Kumagai, T., Kishimoto, Y., Nakamura, O., Tagawa, T., Himeno, T. and Shimasaki, S. "Observation of Single and Continuous Bubbles Rising in Reduced Pressure Vessel," Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 101(2), pp. 93-100, (2015).
・Tagawa, T.,"Numerical investigation of Benard-Marangoni convection of paramagnetic liquid in annular layers," Proceeedings of the 15th International Heat Transfer Conference, IHTC15-9974, (2014).
・Song, K.W., Tagawa, T., Wang, L.B. and Ozoe, H., "Numerical investigation for the modeling of the magnetic buoyancy force during the natural convection of air in a square enclosure," Advances in Mechanical Engineering, Volume 2014, Article ID 873260, 11 pages, (2014).
・Kitaura, T. and Tagawa, T., "Linear stability analysis of thermal convection in an infinitely long vertical rectangular enclosure in the presence of a uniform horizontal magnetic field," Journal of Fluids, vol. 2014, Article ID 642042, 8 pages, (2014).
・Tagawa, T. and Enomoto, T., “Effect of magnetic fields on oscillatory Marangoni convection in a half-zone of an electric conducting liquid bridge”, Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, vol. 79, no. 801, pp. 848-862, (2013).
・Iijima, A., Sato, T. and Tagawa, T, “Numerical analysis of flow around a moving object by an immersed boundary method with the level set method”, Advances in Mechanical Engineering, vol. 2013, Article ID 868240, 9 pages, (2013).
・Tagawa, T. and Egashira, R., “Fluid flow of a liquid metal in a cylinder driven by a rotating magnetic field”, Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, vol. 78, no. 794, pp. 1680-1695, (2012).
・Tagawa, T., “Magnetic Benard-Marangoni convection in an annular liquid layer”, Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, vol. 78, no. 787, pp. 618-633, (2012).
・Tagawa, T., “Magnetic Rayleigh-Benard convection of air in a coaxial double cylinder”, Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, vol. 77, no. 773, pp. 106-119, (2011).
・Shibasaki, Y., Ueno, K. and Tagawa, T.,“Computation of a rising bubble in an enclosure filled with liquid metal under vertical magnetic fields”, ISIJ International, 50/3, pp. 363-370, (2010).
・Shibasaki, Y., Tagawa, T. and Ueno, K., “Effect of an external magnetic field on a rising air bubble in a liquid metal”, Magnetohydrodynamics, 45/3, pp. 467-473, (2009).
・Tagawa, T. and Ozoe, H., “Effect of external magnetic fields on various free-surface flows”, Progress in Computational Fluid Dynamics, 8 / 7-8 , pp. 461-468, (2008).
・Ozoe, H., Szmyd, J. S. and Tagawa, T., Magnetic Fields in Semiconductor Crystal Growth, “Magnetohydrodynamics: Historical Evolution and Trends” (Molokov, S., Moreau, R., Moffatt, H. K. eds.), Springer, pp. 375-390, (2007).
・Tagawa, T., “Numerical simulation of liquid metal free-surface flows in the presence of a uniform static magnetic field”, ISIJ International, 47 (4), pp. 574-581, (2007) .
・Lee, C.H., Tagawa, T., Ozoe, H. and Hyun, J.M., “Spin-up from rest in a cylinder of an electrically conducting fluid in an axial magnetic field”, Acta Mechanica, 186 (1-4), pp. 203-220, (2006) .
・Tagawa, T., “Numerical simulation of two-phase flows in the presence of a magnetic field”, Mathematics and Computers in Simulation, 72 (2-6), pp. 212-219, (2006) .
・Tagawa, T., “Numerical simulation of a falling droplet of liquid metal into a liquid layer in the presence of a uniform vertical magnetic field”, ISIJ International, 45 (7), pp. 954-961, (2005) .
・Tagawa, T., Ujihara, A. and Ozoe, H., “Numerical computation for Rayleigh-Benard convection of water in a magnetic field”, International Journal of Heat and Mass Transfer, 46 (21), pp. 4097-4104, (2003) .
・Authie, G., Tagawa, T. and Moreau, R., “Buoyant flow in long vertical enclosures in the presence of a strong horizontal magnetic field. Part 2. Finite enclosures”, European Journal of Mechanics, B/Fluids, 22 (3), pp. 203-220, (2003).

受賞

日本伝熱学会学術賞 (2003年5月)

所属学会・学会活動

日本機械学会
日本鉄鋼協会
日本伝熱学会
化学工学会(粒子・流体プロセス部会;熱工学部会)
日本流体力学会
日本航空宇宙学会