Abstract: The jet influence on the gassolid crossflow in a confined domain was investigated by unsteady numerical computation. By analyzing the numerical results, backflow was found in the jet wake. A series of vortex occurring, spiraling and breaking phenomena were also found in the flow. By supervising some critical points in the flow, the vortex shedding was found to be periodic which is a kind of the Karman vortex street. By tracking the particle path and analyzing the particle concentration field, particles on the 10 μm scale were found forming a clear and persistent low concentration region in the flow field. The simulated results agree well with the experimental. The numerical simulation data untested in the experiment were analyzed to enhance the understanding of the flow characteristic and particle concentration, providing reference to the application of wall jet controlling method in fluid engineering.

Key words: gas-solid multiphase flow； , confined domain； wall jet, unsteadiness； periodic