WIT Press


A Three-dimensional Numerical Simulation Of Particle-gas Mixing In An Ejection With A Spherical Sample Surface

Price

Free (open access)

Paper DOI

10.2495/CMEM130121

Volume

55

Pages

10

Page Range

139 - 148

Published

2013

Size

1,287 kb

Author(s)

K. Liu, L. Li, S. Yuan, J. Bai & P. Li

Abstract

A three-dimensional numerical simulation employed with particle trajectory model is implemented to simulate particle-gas interaction in spherical ejecta problem, in which particles are ejected from a shocked sample surface. The particles’ initial distribution is modelled due to characteristics of ejection processes and references data. And action on gas of the moving sample surface is simulated by using ghost fluid coupling Eulerian-Lagrangian method. Only a steady drag force between particles and gas is considered at present. The evolutions of gas flow and particle movements are shown in this paper. It is concluded that the particle cloud naturally changes into a high-density lowvelocity region and a low-density high-velocity one. This qualitatively agrees with ejection experimental acquaintance. Keywords: spherical ejecta, particle-gas mixing, particle trajectory model, ghost fluid coupling Eulerian-Lagrangian method, three-dimensional numerical simulation.

Keywords

Keywords: spherical ejecta, particle-gas mixing, particle trajectory model, ghost fluid coupling Eulerian-Lagrangian method, three-dimensional numerical simulation.