抄録
The collision between a vortex ring and glass particles is simulated by the three-dimensional vortex method. The vortex ring, convecting with the self-induced velocity in a quiescent air, collides with particles. The Reynolds number for vortex ring is 2600, while the Stokes number for particle is 0.74. Just after the collision with the vortex ring, the particles surround the vortex ring, forming a dome. It is parallel with the preferential distribution of the particle with Stokes number unity that have been measured and simulated numerically in various free turbulent flows. The collision reduces the circulation and core diameter of the vortex ring.
