Shock-driven Multiphase Instabilities in Expanding Cylindrical Geometry*

This work examines the particle jetting behavior in a dense bed of particles with 60% volume fraction driven by an air-blast. Three-dimensional Euler-Lagrange simulations were conducted in a cylindrical computational domain using the finite volume code, RocfluMP. The Lagrangian particles are tracked using the particle in cell library PpiclF. The experiments by Rodriguez et al. (2013) are replicated by extending the prior two-dimensional numerical studies to three-dimensions with the aim of capturing the multiphase instabilities that occur both in the gas and granular phases. Recent advances in quasi-steady and added-mass force modeling have enabled state-of-the-art representation of the inter-phase coupling in the simulations. We address accurate computation of force chain networks with the purpose of accurately analyzing the formation of particulate jets. We closely examine the effects of parameter values such as granular material, particle diameter, and shock strength.