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

The Korean Society of Mechanical Engineers (대한기계학회)
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Numerical Analysis of Microchannel Flows Using Langmuir Slip Model

Langmuir 미끄럼 모형을 사용한 미소채널 유동의 수치해석

  • 맹주성 (한양대학교 기계공학부) ;
  • 최형일 (한양대학교 대학원 기계공학과) ;
  • 이동형 (한양대학교 안산캠퍼스 기계산업공학부)
  • Published : 2002.04.01
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Abstract

The present research proposes a pressure based approach along with Langmuir slip condition for predicting microscale fluid flows. Using this method, gaseous slip flows in 2 -dimensional microchannels are numerically investigated. Compared to the DSMC simulation, statistical errors could be avoided and computing time is much less than that of the aforementioned molecular approach. Maxwell slip boundary condition is also studied in this research. These two slip conditions give similar results except for the pressure nonlinearity at high Knudsen number regime. However, Langmuir slip condition seems to be more promising because this does not need to calculate the streamwise velocity gradient accurately and to calibrate the empirical accommodation coefficient. The simulation results show that the proposed method using Langmuir slip condition is an effective tool for predicting compressibility and rarefaction in microscale slip flows.

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References

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