Effects of Coriolis Force on Basic Flows : About Flow around Circular Cylinder and Vortex
Details
It was investigated how flow-phenomena usually observed changed with the Coriolis force. At first we constructed a turntable, on which we studied two types of basic flows, that is, flow around a circular cylinder and a vortex flow in a cylindrical container. In the case of the flow around a circular cylinder perpendicular to the rotating axis, we found that there was the critical Rossby number, under which no Karman vortex could exist. Above the critical Rosbby number, Karman vortex could exist but the axis of vortexes were found inclined relative to the axis of cylinder, which was also explained with the effects of Coriolis force. In the case of vortex flow in a cylindrical container perpendicular to the rotating axis, we found also that there was the critical Rossby number, under which the vortex could not exist. Above the critical Rosbby number, the vortex could exist but the axis of vortex was found inclined relative to the axis of cylinder.
