Molecular Dynamics Simulation of Gas Molecules Reflected from Rough Surface

Abstract

Direct statistical Monte-Carlo simulation of rarefied gas molecular flow near a rough surface is studied on the base of analytical approximation of scattering function V and of the momentum and energy exchange coefficients [1-3]. The computation time is reduced due to the expansion of the roughness operatorŜ [2-6], which is used to express the scattering function V on rough surface in the form V =Ŝ V 0. The representation of the roughness operator is derived that is convenient to use both in numerical DSMC methods and in analytical investigations.