Computational Analysis of Deformation Wave Structure Within aParticle-Laden Gas:79th Shock Vibration Symposium

摘要

Multiphase continuum theories have been routinely used to analyze high rate defor-mation of dispersed solid particle-gas mixtures. Though these theories have beenapplied to both dilute and dense mixtures, flow structures for mixtures having aninitial particle volume fraction within the range of 10-70% have not been thor-oughly investigated. In this work, a two-phase continuum model is numericallyintegrated to predict the inert planar impact response of uniformly dispersed ex-plosive particle-air mixtures having a wide range of initial particle volume fractionsbecause of its relevance to ignition. The model allows for flexible partitioning ofdissipation between phases in a manner that is compatible with thermodynamics.Particular emphasis is placed on characterizing how initial porosity, explosive par-ticle size, and impact speed affect velocity, stress, and temperature fields within thesolid and gas. Also, the influence of drag and compaction induced dissipation onphase specific heating is examined.