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如果将格子Boltzmann方程的碰撞项由Fermi型改为Boltzmann型,可大幅度地降低沾滞系数,从而提高了用格子Boltzmann方程模拟流体运动的效率。理论分析与模拟结果精确的一致。It is pointed out that if collision term in lattice Boltzmann equation is changed from Fermi type to Boltzmann type, viscosity coefficient will be decreased greatly. Low viscosity makes lattice Boltzmann equation method more effecient in simulating fluid behaviors. Theoretical solution is coherent with simulation results.
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