Shock wave reflections in dust-gas suspensions

The reflection of planar shock waves from straight wedges in dust-gas suspe nsions is investigated numerically. The GRP shock capturing scheme and the MacCormac scheme are applied to solve the governing equations of the gaseou s and solid phases, respectively. These two schemes have a second-order acc uracy both in time and space. It is shown that the presence of the dust sig nificantly affects the shock-wave-reflection-induced phenomenon in a pure g as, the flow field in the present case is not pseudo steady. The presence o f the dust results in lower gas velocities and gas temperatures and higher gas densities and gas pressures than in dust-free shock wave reflections wi th identical initial conditions. It is also shown that the smaller is the d iameter of the dust particle the larger are the above-mentioned differences . In addition, the smaller is the diameter of the dust particle the narrowe r is the width of the dust cloud behind the incident shock wave. Larger dus t velocities, dust temperatures and dust spatial densities are obtained ins ide this dust velocities, dust temperatures and dust spatial densities are obtained inside this dust cloud for smaller dust particles. The results pro vide a clear picture of whether and how the presence of dust particles affe cts the shock-wave-reflection-induced flow field.