TS-32 The Interrelated Structure between the Particle Motion and the Vortices in Gas-Particle Two-Phase Flows(Session B-3: Advanced Numerical Analysis of Cascade)

WU Wenquan, HUANG Yuandong

We present a numerical investigation on the two-dimensional, dilute gas-particle two-phase flows past a circular cylinder at high Reynolds number with one-way coupling model. Here we apply the Discrete Vortex Method (DVM) to compute the unsteady and unstable gas flow with massive separation and adopt a Lagrangian approach to simulate the particle notion. The results clearly reveal that the very large size particles (St>>1) are less affected by the vortices ; the very small size particles (St<<1) follow the streamlines of fluid, as a single phase fluid flow ; while the general intermediate size particles (St〜O(1)) are separated from the gas-particle mixture, of which motion is obviously influenced by the vortices-the particles move toward the vortices region in the wake, and finally concentrate near the vortices. Based upon the above numerical experiments, a fine interrelated structure between the particle motion and the vortices is proposed.

TS-32 The Interrelated Structure between the Particle Motion and the Vortices in Gas-Particle Two-Phase Flows(Session B-3: Advanced Numerical Analysis of Cascade)

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