Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Study on the Pressure Drop Characteristics of Liquid Flow in Open Microchannels with the Countercurrent Vapor Flow

기체 대향류가 존재하는 미소 액체 개수로 유동의 압력강하 특성에 관한 이론 및 실험적 연구

  • 김성진 (한국과학기술원 기계공학과) ;
  • 남명용 (한국과학기술원 인공위성 연구센터) ;
  • 서정기 (한국과학기술원 기계공학과)
  • Published : 2005.06.01
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Abstract

Because the liquid-vapor interfacial shear stress affects seriously the liquid flow and the maximum heat transport rate of the grooved wick heat pipe, an accurate modeling for the pressure drop characteristics of the liquid flow is required. A novel method for calculating the liquid pressure drop and the velocity profile of an open channel flow in a microchannel with an arbitrary cross-section is suggested and validated by experiments. An experimental apparatus for the Poiseuille number of the liquid flow in open rectangular microchannels with the hydraulic diameters of 0.40mm, 0.43mm, 0.48mm is used in order to reproduce real situations in the grooved wick heat pipe. Analytic results from the suggested method are compared with the experimental data and they are in a close agreement with each other.

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References

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