The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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Numerical Analysis on Thermal Transpiration Flows for a Micro Pump

열천이 현상을 이용한 마이크로 펌프내의 희박기체유동 해석

  • 허중식 (한국기기유화시험연구원 유체기계평가팀) ;
  • 이종철 (강릉대학교 기계자동차공학부) ;
  • 황영규 (성균관대학교 기계공학부) ;
  • 김윤제 (성균관대학교 기계공학부)
  • Published : 2007.10.01
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Abstract

Rarefied gas flows through two-dimensional micro channels are studied numerically for the performance optimization of a nanomembrane-based Knudsen compressor. The effects of the wall temperature distributions on the thermal transpiration flow patterns are examined. The flow has a pumping effect, and the mass flow rates through the channel are calculated. The results show that a steady one-way flow is induced for a wide range of the Knudsen number. The DSMC(direct simulation Monte Carlo) method with VHS(variable hard sphere) model and NTC(no time counter) techniques has been applied in this work to obtain numerical solutions. A critical element that drives Knudsen compressor Is the thermal transpiration membrane. The membranes are based on aerosol or machined aerogel. The aerogel is modeled as a single micro flow channel.

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References

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