Transport Coefficients in Direct Simulation Monte Carlo Method for Rarefied Gas Flow

概要

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A method to obtain transport coefficients for systems simulated by the direct simulation Monte Carlo method is proposed using the fluctuation-dissipation theorem. Its application is demonstrated by determining the viscosity coefficient. To this end, the correlation function was calculated numerically in the equilibrium system modeled by the direct simulation Monte Carlo method. The viscosity coefficient was obtained by matching, in the collisional regime, the numerical correlation function with the theoretical one the viscosity coefficient being a free parameter. The viscosity so determined agrees well with the one given by the Chapman-Enskog method. The present method can also be used to obtain the other transport coefficients in much complex gases such as the one with multispecies.
宇宙航空研究開発機構の論文
1988-07-00