Numerical Simulation of Gas-Particle Two-Phase Single Jets by Vortex Method

摘要

Gas-particle two-phase single jet is simulated by the vortex method to investigate the relation between particles and large-scale coherent structure. The results of numerical simulation displayed that the motion of small particle is closely connected to large-scale vortex dynamics. And, we could found small particles could be entrained into the central region of coherent structures. But large particles only appeared around the suburb of coherent structures. However, in the initial region the dispersion of small particles matches very good with the profile of x-directional velocity. After the end of potential core, the dispersion is influenced by y-directional velocity and fluctuation so the dispersions do not correspond with the profile of x-directional velocity. For large particles, the effects of y-directional velocity and fluctuation on particle motions are small. So, dispersion still matches very good with the profile of x-directional velocity in the downstream and obtains similarity distributions.