Test of Efficiency of Variable Soft Sphere and Variable Hard Sphere Molecular Models in the Direct Simulation Monte Carlo Method

Abstract

The efficiency of the Variable Soft Sphere(VSS)and Variable Hard Sphere(VHS)molecular models is investigated by estimating the transport coefficients, and simulating a free jet in a binary gas mixture, and a normal shock wave structure in a binary gas mixture, using the Lennard-Jones(6-12)(LJ)potential and LJ potential type VSS and VHS models.It is confirmed that the transport coefficients using the VSS model are consistent with those of the LJ potential, and calculated results using the VSS model for free jet and normal shock wave structures are in good agreement with those of the LJ potential. There are, however, some discrepancies in transport coefficients and calculated results using the VHS model and the LJ potential.