A transient vortical structure of flow past a sphere at moderate Reynolds numbers has been investigated using a computational method. As the Reynolds number increases, the vortical structure changes. First, a steady axisymmetric separated flow appears. Secondly, a steady non-axisymmetric flow is observed. And then, an unsteady flow structure occurs. In this paper, vortex lines are visualized in the wake region, and a mechanism of vortex shedding is discussed.
出発直後から非対称流れが生じるまでの球後流の構造
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