Shock-induced ejecta from a layer of spherical particles. Part II: modeling with the non-equilibrium two-phase model of a granular medium

[摘要] In this work we consider the problem of high-velocity impact of a solid impactor on the layer of spherical solid particles. The impact initiates a wave-type process of compaction of particles in the layer, and the ejection of small solid particles from the compacted layer surface to the air. The first part of the paper addresses modelling the process of particle compaction and the initial stage of solid ejection with the SPH method. In the second part presented below, we consider the process of compaction and solid mass ejection using a new non-equilibrium two-phase model of the granular medium. This model makes it possible to describe mechanics of two-phase gas-solid medium in a wide range of the phase volume fraction, from regimes of isolated particle flows to regimes of dense packed particles.

[发布机构] Dukhov Research Institute of Automatics (FSUE VNIIA), Moscow; 127055, Russia^1;Keldysh Institute for Applied Mathematics RAS, Moscow; 125581, Russia^2;Moscow Engineering Physics Institute, National Research Nuclear University, Kashirskoe Shosse 31, Moscow; 115409, Russia^3

[效力级别] 力学 [学科分类] 力学，机械学

[关键词] Granular medium;Heterogeneous medium;High-velocity impact;Non equilibrium;Phase volume fraction;Solid particles;Spherical particle;Two-phase model