Numerical investigation of interaction between shock waves and dusty flows

We numerically investigate the interaction between gas-particles flows and shock waves that form during the explosive decompression of underexpanded jets. Simulations are carried out using a validated second-order accurate numerical model for multiphase flows. We quantify theoretically the expected non-equilibrium effects between the gas and the solid phase in terms of the ratio between the particle relaxation time and the characteristic time scale of the jet. We show how multiphase effects affect the average jet dynamics. We carry on the analysis for monodisperse mixtures and we extend it to bidisperse and polydisperse mixtures.