Experimental Study on Control of the Wall Turbulence with Spanwise Discontinuity of Surface Roughness

• Project/Area Number: 20560162
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Yamaguchi University
• Principal Investigator: MOCHIZUKI Shinsuke Yamaguchi University, 大学院・理工学研究科, 教授 (70190957)
• Co-Investigator(Kenkyū-buntansha): KAMEDA Takatsugu 山口大学, 大学院・理工学研究科, 准教授 (70304491)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2009: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2008: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
• Keywords: 二次流れ / 粗面 / 乱流 / 内部流れ / チャネル流 / 乱流工学 / 粗度

Research Abstract

An experimental study shows existence of longitudinal vortex by spanwise discontinuity of surface roughness and its producing mechanisms. The longitudinal vortex is generated along the discontinuity of surface roughness and induces secondary current. Evaluation of production terms in the transport equation of the longitudinal vorticity reveals that turbulence distributions contribute to the vorticity production. This finding could be applied to vortex generator without protrusion height.

Research Products

• [Journal Article] Response of Fully Developed Pipe Flow to Rough Wall Disturbances (Turbulent Field) (2011)
  • Author(s): Aung Thuyein WIN, Shinsuke MOCHIZUKI, Takatsugu KAMEDA
  • Journal Title: J.Fluid Science & Technology Vol.6, No.2 Pages: 192-201
  • NAID: 130000664852
  • Peer Reviewed
• [Journal Article] Disturbed Turbulent Structure of Fully Developed Pipe Flow by Rough Walls (2011)
  • Author(s): Aung Thuyein WIN, Shinsuke MOCHIZUKI, Takatsugu KAMEDA
  • Journal Title: Proc.Int.Conf.on Fluid Dynamics and Thermodynamics, World Academy of Science Engineering & Technology Year 7, Issue 73 Pages: 403-408
  • Peer Reviewed
• [Journal Article] Response of Fully Developed Pipe Flow to Rough Wall Disturbances (Turbulent Field) (2011)
  • Author(s): Aung Thuyein Win
  • Journal Title: Journal of Fluid Science and Technology Volume: 6 Pages: 192-201
  • Peer Reviewed
• [Journal Article] Response of Fully Developed Pipe Flow to Rough Wall Disturbances (Mean Velocity Field) (2010)
  • Author(s): Aung Thuyein WIN, Shinsuke MOCHIZUKI, Takatsugu KAMEDA
  • Journal Title: J.Fluid Science & Technology Vol.5, No.2 Pages: 340-350
  • NAID: 130000303622
  • Peer Reviewed
• [Journal Article] 壁面粗度の急変かによる撹乱を受けた円管乱流の応答に関する研究 (2010)
  • Author(s): 戎本圭佑
  • Journal Title: 日本機械学会中国四国支部第48期総会・講演会講演論文集 105-1 Pages: 425-426
• [Journal Article] 粗度のスパン方向不連続をもつチャネル乱流に関する研究 (2010)
  • Author(s): 出戸隆道
  • Journal Title: 日本機械学会中国四国支部第48期総会・講演会講演論文集 105-1 Pages: 429-430
• [Journal Article] Flow Management of a Plane Turbulent Wall Jet by a Streamwise Vortex Pair with Periodic Variation in Strength and Radius (2009)
  • Author(s): Shinsuke MOCHIZUKI, Seiji YAMADA, Takatsugu KAMEDA
  • Journal Title: J.Fluid Science & Technology Vol.4, No.2 Pages: 313-323
  • NAID: 130000873898
  • Peer Reviewed
• [Journal Article] Response of the Fully Developed Pipe Flow to Roughness Disturbances (2009)
  • Author(s): Aung Thuyein Win
  • Journal Title: 日本機械学会2009年度年次大会講演論文集 2 Pages: 229-230
• [Presentation] スパン方向粗さの不連続性による二次流れの精製に関する研究 (2011)
  • Author(s): 伊勢家一馬, 吉岡浩, 望月信介, 亀田孝嗣
  • Organizer: 日本機械学会中国四国支部第49期総会・講演会
  • Place of Presentation: 岡山理科大学(岡山市)
  • Year and Date: 2011-03-05
• [Presentation] スパン方向粗さの不連続生による二次流れの生成に関する研究 (2011)
  • Author(s): 伊勢家一馬
  • Organizer: 日本機械学会中国四国支部第49期総会・講演会
  • Place of Presentation: 岡山理科大学
  • Year and Date: 2011-03-05
• [Presentation] Disturbed Turbulent Structure of Fully Developed Pipe Flow by Rough Walls (2011)
  • Author(s): Aung Thuyein Win
  • Organizer: International Conference on Fluid Dynamics and Thermodynamics
  • Place of Presentation: Dubai (UAE)
• [Presentation] Response of the Turbulent Structure to Roughness Disturbances in Fully Developed Pipe Flow (2010)
  • Author(s): Aung Thuyein WIN, Shinsuke MOCHIZUKI, Takatsugu KAMEDA
  • Organizer: 日本機械学会2010年度年次大会
  • Place of Presentation: 名古屋工業大学(名古屋市)
  • Year and Date: 2010-09-07
• [Presentation] Response of the Turbulent Structure to Roughness Disturbances in Fully Developed Pipe Flow (2010)
  • Author(s): Aung Thuyein Win
  • Organizer: 日本機械学会2010年度年次大会
  • Place of Presentation: 名古屋工業大学
  • Year and Date: 2010-09-07
• [Presentation] 粗度のスパン方向不連続をもつチャネル乱流に関する研究 (2010)
  • Author(s): 出戸隆道, 望月信介, 亀田孝嗣
  • Organizer: 日本機械学会中国四国支部第48期総会・講演会
  • Place of Presentation: 広島工業大学(広島市)
  • Year and Date: 2010-03-06
• [Presentation] 壁面粗度の急変化による撹乱を受けた円管乱流の応答に関する研究 (2010)
  • Author(s): 戎本圭佑, アウング・トゥーレイ・ウイン, 望月信介、亀田孝嗣
  • Organizer: 日本機械学会中国四国支部第48期総会・講演会
  • Place of Presentation: 広島工業大学(広島市)
  • Year and Date: 2010-03-06
• [Presentation] Response of the Fully Developed Pipe Flow to Roughness Disturbance (2009)
  • Author(s): Aung Thuyein WIN, Shinsuke MOCHIZUKI, Takatsugu KAMEDA
  • Organizer: 日本機械学会2009年度年次大会
  • Place of Presentation: 岩手大学(盛岡市)
  • Year and Date: 2009-09-15
• [Presentation] 粗度が急変化する円管流れの応答に関する研究 (2009)
  • Author(s): 島原直彦, 望月信介, 亀田孝嗣, Aung Thuyein WIN
  • Organizer: 日本機械学会中国四国支部第47期総会・講演会
  • Place of Presentation: 山口大学工学部(宇部市)
  • Year and Date: 2009-03-06
• [Presentation] Flow management of a plane turbulent wall jet by a streamwise vortex pair with periodic variation in strength and radius (2008)
  • Author(s): Shinsuke Mochizuki
  • Organizer: The 2^<nd> International Conference on Jets, Wakes and Separated Flows
  • Place of Presentation: ベルリン工科大学(ドイツ)
  • Year and Date: 2008-09-16
• [Remarks] ホームページ等 なし