The Influence of Initial Velocity and Temperature Lag on the Relaxation Zone behind a Shock Wave in a Gas-Solid Flow

Abstract

Thermal and velocity lag prior to the gas discontinuity are shown to have a significant effect on the properties of the relaxation zone of a gas-solid flow shock wave. The results obtained by previous workers assuming equilibrium conditions are not therefore applicable to shock waves formed in gas-solid nozzle flows where considerable disequilibrium already exists. The variations of the relevant flow properties in the relaxation zone are interpreted physically in terms of the magnitude and sign of the heat, momentum and kinetic energy transfer between the solid particles and the gas.