Hydrodynamics and boiling phenomena of droplets impinging on hot solid

• Project/Area Number: 21560212
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Kyoto University
• Principal Investigator: FUJIMOTO Hitoshi 京都大学, 大学院・エネルギー科学研究科, 准教授 (40229050)
• Co-Investigator(Kenkyū-buntansha): TAKUDA Hirohiko 京都大学, 大学院・エネルギー科学研究科, 教授 (20135528)
• Project Period (FY): 2009 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2009: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 対流 / 液滴 / 沸騰 / 可視化 / 熱工学 / スプレー冷却 / 可視化実験

Research Abstract

Deformation behavior and boiling phenomena of droplets impinging on hot solid was observed by means of a two-directional flash-photography technique using two digital still cameras and three flash units developed by the present researchers.The boiling phenomena can be roughly explained in terms of the interfacial temperature given by one-dimensional heat conduction theory and the limit of superheat of liquid.At interfacial temperatures higher than the limit of superheat, a vapor film is formed immediately after the collision. The dynamical similarity of the liquid motion is roughly obtained by the Weber number (the ratio of the inertia force to the surface tension force)alone.

Research Products

• [Journal Article] Successive Collision of Two Water Droplets with Hot Solid (2013)
  • Author(s): Hitoshi Fujimoto
  • Journal Title: International Juournal of Transport Phenomena Volume: 14
  • Peer Reviewed
• [Journal Article] An Experimental Study on the Oblique Collisions of Water Droplets with a Smooth Hot Solid (2012)
  • Author(s): Hitoshi Fujimoto, Ryota Doi, and Hirohiko Takuda.
  • Journal Title: Transactions of the ASME Journal of Fluids Engineering Volume: 134-7 Issue: 7
  • DOI: 10.1115/1.4006926
  • NAID: 120006596491
  • Peer Reviewed
• [Journal Article] An Experimental Study of the Deformation behavior of Water Droplets Impinging Obliquely on a Hot Substrate (2010)
  • Author(s): Hitoshi Fujimoto, Yosuke Oku, Tomohiro Ogihara, Takayuki Hama, and Hirohiko Takuda
  • Journal Title: Journal of Flow Visualizaion and Image Processing Volume: 17-2 Issue: 2 Pages: 1-16
  • DOI: 10.1615/jflowvisimageproc.v17.i2.20
  • Peer Reviewed
• [Journal Article] Hydrodynamics and boiling phenomena of water droplets impinging on hot solid (2010)
  • Author(s): Hitoshi Fujimoto, Yosuke Oku, Tomohiro Ogihara, Hirohiko Takuda
  • Journal Title: International Journal of Multiphase Flow Volume: 36-8 Issue: 8 Pages: 620-642
  • DOI: 10.1016/j.ijmultiphaseflow.2010.04.004
  • NAID: 120002484955
  • Peer Reviewed
• [Journal Article] An Experimental Study of the Deformation behavior of Water Droplets Impinging Obliquely on a Hot Substrate (2010)
  • Author(s): H.Fujimoto, et al.
  • Journal Title: Journal of Flow Visualization and Image Processing Volume: 17 Pages: 1-16
  • Peer Reviewed
• [Journal Article] Hydrodynamics and boiling phenomena of water droplets impinging on hot solid (2010)
  • Author(s): H.Fujimoto, et al.
  • Journal Title: International Journal of Multiphase Flow Volume: 36 Pages: 620-642
  • NAID: 120002484955
  • Peer Reviewed
• [Journal Article] Experimental Study on Oblique Collisions of Water Droplets with Hot Solid (2010)
  • Author(s): H.Fujimoto, et al.
  • Journal Title: IMECE2010 Pages: 1-10
  • Peer Reviewed
• [Journal Article] AN EXPERIMENTAL STUDY OF THE DEFORMATION BEHAVIOR OF WATER DROPLETS IMINGING OBLIQUELY ON A HOT SUBSTRATE (2010)
  • Author(s): H.Fujimoto, H.Takuda, et al.
  • Journal Title: Journal of Flow Visualization and Image Processing 17(in press)
  • Peer Reviewed
• [Journal Article] Successive Collision of Two Water Droplets with Hot Solid
  • Author(s): International Journal of Transport Phenomena 2013
  • Journal Title: H. Fujimoto, T.Ogihara, S. Yoshimoto, T.Hama and H.Takuda Volume: (in press)
  • Peer Reviewed
• [Presentation] 高温固体面に連続衝突する 2 液滴の変形挙動 (2012)
  • Author(s): 藤本仁
  • Organizer: 日本鉄鋼協会講演大会
  • Place of Presentation: 大阪大学吹田キャンパス
  • Year and Date: 2012-09-20
• [Presentation] Successive Collision of Two Water Droplets with Hot Solid (2012)
  • Author(s): H.Fujimoto
  • Organizer: 23rd International Symposium on Transport Phenomena
  • Place of Presentation: Auckland, New Zealand
• [Presentation] 高温固体面に連続衝突する二液滴の変形挙動および沸騰現象 (2011)
  • Author(s): 藤本仁
  • Organizer: 第162回日本鉄鋼協会秋季講演大会
  • Place of Presentation: 大阪大学吹田キャンパス
  • Year and Date: 2011-09-20
• [Presentation] Experimental Study on Oblique Collisions of Water Droplets with Hot Solid (2010)
  • Author(s): H.Fujimoto
  • Organizer: ASME IMECE2010
  • Place of Presentation: Vancouver Canada
  • Year and Date: 2010-11-14
• [Presentation] 高温固体面に衝突する液滴変形挙動の力学的相似性 (2010)
  • Author(s): 藤本仁
  • Organizer: 日本鉄鋼協会
  • Place of Presentation: 筑波大学
  • Year and Date: 2010-03-29