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

The Korean Society of Mechanical Engineers (대한기계학회)
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The Study on the Two-Phase Flow in the Microchannel Using DSMC(Direct Simulation Monte Carlo) Method

DSMC(Direct Simulation Monte Carlo)방법을 이용한 마이크로관 내에서의 2 상유동에 관한 연구

  • 이진호 (연세대학교 기계공학과) ;
  • 유동훈 (연세대학교 부설 자동차기술연구소) ;
  • 이태홍 (연세대학교 기계공학과 열공학연구실)
  • Published : 2003.12.01
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Abstract

In contrast to the high demand for MEMS devices, microflow analysis is not feasible even for single-phase flow with conventional Navier-Stokes equation because of non-continuum effect when characteristic dimension is comparable with local mean free path. DSMC is one of particle based DNS(Direct Numerical Simulation) methods that uses no continuum assumption. In this paper, gas flow in microchannel is studied using DSMC. Interfacial shear and flow characteristics are observed and compared with the results of gas flow that is in contact with liquid case and solid wall case. The simulation is limited to the case of equilibrium steady state and evaporation/condensation coefficient is assumed to be the same and unity. System temperature remains constant and the interfacial shear appears to be small compared to the result with solid wall. This is because particles evaporated and reflected from the liquid surface form high density layer near the interface with liquid flow.

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References

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