Wei Liao, Postdoctoral Fellow, Old Dominion University

Gas Kinetic Scheme for Continuum and Near-Continuum Hypersonic Flows.

Abstract:  We are trying to present a unified approach for both continuum and near-continuum flows based on kinetic theory and Boltzmann equation. We use the gas-kinetic scheme (GKS) developed from thelinearized Boltzmann equation for the continuum flows and the modified GKS with a variable relaxation time for near-continuum flows. The gas-kinetic scheme is validated with simulations of the
Mach-9 hypersonic flow around a hollow flare and the Mach-9 shock structure of argon gas. The results show that the gas-kinetic scheme can indeed simulate both continuum and near-continuum flows.