二相流に対する格子ボルツマン・スキームの提案

概要

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A finite difference lattice Boltzmann method (FDLBM) for two-phase flows pertinent to isothermal nonideal fluids is proposed. This FDLBM introduces a pseudo-potential and recovers a full set of hydrodynamic equations for nonideal fluid through the Chapman-Enskog expansion procedure. Numerical measurement of surface tension agrees well with theoretical predictions. Simulations of two-phase phenomena, including phase-transition and droplets collision are carried out, showing applicability of the model for two-phase flows. Numerical stability of the scheme is ensured by using finite difference Lattice Boltzmann method. This LB model retains advantages of conventional LB methods such as a linear advection in the kinetic equation and parallel nature in computing.
社団法人日本機械学会の論文
1999-06-25