Numerical Study of Laminar Flow over a Protruding Surface (II) - Topological and Kinematical Studies -

돌출된 표면위의 층류유동에 대한 전산 해석적 연구 (II) - 위상학적, 기구학적 연구 -

Topological and kinematical studies of the singular points found in flows around a surface-mounted cube in a channel are presented. Numerical simulation was carried out using high-resolution grid systems. Singular points(saddles and nodes) were found around the cube, which satisfy the topological rules suggested by Hunt et al. As the Reynolds number increases, the structure of vortices around the cube becomes complex and the number of singular points increases. Nevertheless, the rule governing the numbers of singular points is still valid. This confirms that our simulation is correct from topological and kinematical point of view, and enables one to infer complex flow patterns in our simulation.