Internal motion of core-mantle structure particle in a hypersonic rarefied gas flow

Abstract

We examined behavior of a partially molten dust particle with shock-wave heating model. We analytically solved hydrodynamical equations for the core-mantle structure particles with linear approximation, and obtained the deformation, internal flow, and pressure distribution. Also we obtained conditions in which liquid mantle may be stripped off from the solid core. When a dust particle has a dense structure and the dust radius is larger than about 5mm, the stripping is expected to occur before the entire dust particle melts. When a dust is porous, the critical size becomes about 2mm.