Employing per-component time step in DSMC simulations of disparate mass and cross-section gas mixtures

Abstract

A new approach to simulation of stationary flows by Direct Simulation Monte Carlo method is proposed. The idea is to specify an individual time step for each component of a gas mixture. The approach consists of modifications mainly to collision phase and recommendation on choosing time step ratios. It allows softening the demands on the computational resources for cases of disparate collision diameters of molecules and/or disparate molecular masses. These are the cases important in vacuum deposition technologies. Few tests of the new approach are made. Finally, the usage of new approach is demonstrated on a problem of silver nanocluster diffusion in carrier gas argon in conditions of silver deposition experiments.

arXiv commentThe goal of submission is to find native English speaker willing to help me polish the paper. This is paper draft sent to Communications in Computational Physics. It is recommended to publication. The need of polishing was one of editors decision. See Additional data for MS Word source file