多孔介质的进出口可以直接用压力边条件么?

wghuang

目的是计算多孔介质的permeability.需要在进出口形成一定的压强差 \Delta_p = p_in - p_out
可以直接用 Zou&He 的压力边条件么? 如果直接用, 进出口处的固体格点该怎么处理?

luo@odu.edu

a) The pressure BCs are NOT necessary; constant body-force can be used, too.

b) If the pressure BCs are necessary, the following 2 papers be of use:

1) Z.L. Guo, T.S. Zhao, Y. Shi,
Physical symmetry, spatial accuracy, and relaxation time of the lattice Boltzmann equation for micro gas flows,
J. Appl. Phys. 99 (2006) 074903.

2) F. Verhaeghe, L.-S. Luo, and B. Blanpain.
Lattice Boltzmann modeling of microchannel flow in slip flow regime.
Journal of Computational Physics 228(1):147-157 (January, 2009).