242 カルマン渦放出周波数の格子依存性(S41-1 移動境界・連成(1),S41 移動境界・連成・振動と騒音問題)  [in Japanese] 242 Grid dependence of frequency of Karman vortex sheets  [in Japanese]

Karman vortex sheets from a two dimensional circular cylinder at low Reynolds number are calculated using node-centered Finite Volume Method and unstructured mesh. In order to prepare for a coupling analysis between flow and structure oscillation, dependence of mesh density for frequency of vortex shedding are investigated in this paper. The results show that it is possible to capture a periodic vortex shedding using a sufficient quantity of unstructured hybrid mesh (mixture of prism and hexagon mesh).