Numerical study of the effect of gravitational sedimentation of large particles on the propagation of a shock wave from a homogeneous gas into a polydisperse gas suspension

Abstract

The effect of the nonuniform concentration of one of the fractions of a two-fraction gas-suspension on the parameters of a shock wave moving from pure gas to a gas-suspension is numerically studied. The motion of a direct shock wave in a two-fraction gas suspension was simulated. The finely dispersed fraction of the gas-suspension had a uniform initial mass content, while larger particles had a nonuniform initial mass content along the y coordinate. It was revealed that in the case of a uniform concentration of all fractions, the shock wave in the channel propagates at a lower speed. It was also found that a nonuniform concentration of the larger particles fraction along the y coordinate affects the spatial distribution of the gas velocity.