A Wave Motion on the free surface of the TayIor vortex flow with an asymmetric system (Flow Visualization and FFT Analysis)

摘要

This study reports experimental results of the free surface flow of rotating fluid between concentric cylinders which the inner cylinder is rotating and the other one is fixed. The free surface flow was developed up to the wave motion with increasing Reynolds number. The wave motion is presumed to be influenced by the inertia force or centrifugal force. As experimental results, the photographs of surface flow were taken by the 35 mm camera. They showed that the wave motion appeared in the whole flow region and then the ring shaped wave formed in the outside region of rotating flow. The variation of the position of free surface was measured by a supersonic sensor and analyzed by FFT method. The phenomena of the transition from the stable state to the chaotic one were clarified.