LATTICE BOLTZMANN METHOD FOR SIMULATING GAS FLOW IN MICROCHANNELS

G. H. Tang, W. Q. Tao () and Y. L. He
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G. H. Tang: School of Energy and Power Engineering, State Key Laboratory of Multiphase Flow, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China
W. Q. Tao: School of Energy and Power Engineering, State Key Laboratory of Multiphase Flow, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China
Y. L. He: School of Energy and Power Engineering, State Key Laboratory of Multiphase Flow, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China

International Journal of Modern Physics C (IJMPC), 2004, vol. 15, issue 02, 335-347

Abstract: Isothermal gas flows in microchannels is studied using the lattice Boltzmann method. A novel equation relating Knudsen number with relaxation time is derived. The slip-velocity on the solid boundaries is reasonably realized by combining the bounce-back reflection with specular reflection in a certain proportion. Predicted characteristics in a two-dimensional microchannel flow, including slip-velocity, nonlinear pressure drop, friction factors, velocity distribution along the streamwise direction and mass flow rate, are compared with available analytical and experimental results and good agreement is achieved.

Keywords: Flow in microchannels; lattice Boltzmann method; slip boundary condition; MEMS devices (search for similar items in EconPapers)
Date: 2004
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Citations: View citations in EconPapers (4)

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DOI: 10.1142/S0129183104005747

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