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|Title:||Lattice Boltzmann method simulation gas slip flow in long microtubes|
|Source:||Huang, H., Lee, T.S., Shu, C. (2007). Lattice Boltzmann method simulation gas slip flow in long microtubes. International Journal of Numerical Methods for Heat and Fluid Flow 17 (6) : 587-607. ScholarBank@NUS Repository. https://doi.org/10.1108/09615530710761225|
|Abstract:||Purpose - This paper aims to examine how using lattice Boltzmann method (LBM) aids the study of the isothermal-gas flow with slight rarefaction in long microtubes. Design/methodology/approach - A revised axisymmetric lattice Boltzmann model is proposed to simulate the flow in microtubes. The wall boundary condition combining the bounce-back and specular-reflection schemes is used to capture the slip velocity on the wall. Appropriate relation between the Knudsen number and relax-time constant is defined. Findings - The computed-slip velocity, average velocity and non-linear pressure distribution along the microtube are in excellent agreement with analytical solution of the weakly compressible Navier-Stokes equations. The calculated-friction factors are also consistent with available experimental data. For simulations of slip flow in microtube, LBM is more accurate and efficient than DSMC method. Research limitations/implications - The laminar flow in circular microtube is assumed to be axisymmetric. The present LBM is only applied to the simulation of slip flows (0.01 < Kn0|
|Source Title:||International Journal of Numerical Methods for Heat and Fluid Flow|
|Appears in Collections:||Staff Publications|
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