Study on Friction Factor of Gaseous Flow in a Micro-channel

• Project/Area Number: 24560239
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: Tokyo Metropolitan University
• Principal Investigator: ASAKO Yutaka 首都大学東京, 理工学研究科, 教授 (20094253)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2012: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
• Keywords: 摩擦係数 / ガス流 / マイクロチャンネル / 温度 / 温度測定 / 国際情報交換

Outline of Final Research Achievements

A theoretical study to derive a formula, which estimates the gas temperature from other physical value and experiments to measure the gas temperature which needs to obtain the friction factor of a gas flow in a micro-channel have been conducted. 1) The formula which estimates the gas temperature from the pressure was successively derived and the temperature is well estimated by using formula. 2) Measurements of the flow rate and the pressure of a gas flow in a micro-tube were conducted. The friction factors were obtained using the estimated temperature. 3) The total temperature of a jet from a micro-tube was measured by using a total temperature measuring device with several baffle plates. It is revealed that the total temperature can be measured by using the total temperature measuring device. 4) The static gas temperature of a jet was measured by using the Laser Induced Fluorescence and it is revealed that the static gas temperature of a laminar jet can be measured by the LIF.

Research Products

• [Journal Article] Data reduction of friction factor of compressible flow in micro-channels (2014)
  • Author(s): D.Kawashima and Y.Asako
  • Journal Title: International Journal of Heat and Mass Transfer Volume: 77 Pages: 257-261
  • DOI: 10.1016/j.ijheatmasstransfer.2014.05.009
  • Peer Reviewed
• [Presentation] Total temperature measurement of micro-gas jet (2014)
  • Author(s): M.Yamada, C.Hong and Y.Asako
  • Organizer: International mechanical engineering congress and exposition
  • Place of Presentation: Montreal, Canada
  • Year and Date: 2014-11-14 – 2014-11-20
• [Presentation] Fluid flow characteristics in micro-gas-jets (2014)
  • Author(s): Y. Asako
  • Organizer: International conference on nano, micro and mini channels
  • Place of Presentation: Chicago, U.S.A.
  • Year and Date: 2014-08-03 – 2014-08-07
  • Invited
• [Presentation] マイクロチューブ出口におけるガスの全温度測定 (2014)
  • Author(s): 松下 正龍，山田 政隆，洪 定杓，浅古 豊
  • Organizer: 日本機械学会九州支部総会講演会
  • Place of Presentation: 北九州
• [Presentation] Measurement of Semi-Local Friction Factor of Gas Flow in Micro-Tube (2013)
  • Author(s): D.Kawashima, Y.Asako
  • Organizer: International conference on nano, micro and mini channels
  • Place of Presentation: Sapporo, Japan
• [Presentation] Measurement of Semi-Local Friction Factor of Gas Flow in Micro-Tube (2013)
  • Author(s): D.Kawashima, Y.Asako
  • Organizer: International conference on nano, micro and mini channels 2013
  • Place of Presentation: Sapporo, Japan
• [Presentation] マイクロチューブ圧縮性流れの管摩擦係数の算出法に関する研究 (2012)
  • Author(s): 川嶋大介，浅古豊
  • Organizer: 第49回日本伝熱シンポジウム
  • Place of Presentation: 富山
• [Presentation] Data reduction of friction factor of compressible flow in micro-channels (2012)
  • Author(s): D.Kawashima, Y.Asako
  • Organizer: ASME, IMECE2012
  • Place of Presentation: Houston, USA