NUMERICAL STUDY OF THE INFLUENCE OF SURFACE ROUGHNESS OF CYLINDER ON FLOW STRUCTURE

摘要

In this paper, the influence of surface roughness on flow structure was nu- merically studied. An adaptive numerical method, the fast vortex method was employed. A mathematical roughness, which comes from the no-slip condition of vortex method, Was introduced. The numerical results indicate that the roughness has appreciable influ- ence on the flow structure. The vortex shedding could be controlled if the forward multi- Layer boundary condition is exerted.