DSMC Simulation with Gas-Surface Interaction Models in Hypersonic Rarefied Flow

摘要

A DSMC (direct simulation Monte Carlo) simulation using Dynamical Molecular Collision (DMC) model based on Molecular Dynamics (MD) calculation with various gas-surface interaction models is applied for solving the two-dimensional nonequilibrium hypersonic rarefied flow over a flat plate with leading edge angle. The gas surface interaction models adopt the diffuse reflection model, the Cercignani-Lampis-Lord(CLL) model and the Multi-Stage (MS) model. Numerical results over the flat plate show that the nonequilibrium between translational and rotational temperature is obtained behind the leading edge over the plate and that the effect of the gas-surface interaction model is significant.