Numerical analysis of gasparticle twophase flows
Abstract
A numerical analysis of axisymmetric gasparticle two phase flows is described. Underexpanded supersonic freejet flows and supersonic flows around a truncated cylinder of gasparticle mixtures are solved numerically on the Fujitsu VP200 supercomputer. Although the gas phase is treated as a continuum medium, the particle phase is done partly as a discrete one. The particle cloud is divided into a large number of small ring clouds. In each cloud, particles are approximated to have nearly the same velocity and temperature. The particle flowfield is obtained by following these individual ring clouds separately in the whole computational domain. In estimating the time rates of momentum and heat transfers from the particle phase to the gas one, the contributions from these ring clouds are averaged over some volume whose characteristic length is sufficiently small compared with the characteristic length of the flowfield but sufficiently large compared with that of the ring clouds. The numerical results have shown that the flow characteristics of the gasparticle mixtures are very much different from those of the dustfree gas.
 Publication:

6th NAL Symposium on Aircraft Computational Aerodynamics
 Pub Date:
 December 1988
 Bibcode:
 1988saca.proc..187I
 Keywords:

 Computerized Simulation;
 Flow Distribution;
 Numerical Analysis;
 Particle Motion;
 Solid Phases;
 Supersonic Flow;
 Two Fluid Models;
 Two Phase Flow;
 Unsteady Flow;
 Calculus;
 Continuity;
 Jet Flow;
 Mathematical Models;
 Numerical Flow Visualization;
 Vapor Phases;
 Fluid Mechanics and Heat Transfer