Abstract
Taylor vortex flow with a small aspect ratio has characteristics such as the different vortex structure, because of the Ekman effect in the top and bottom boundary layers and the acceleration of the inner cylinder. This feature is expected to develop a new typed mixing bioreactor system, but this vortex flow mechanism like a chaotic flow has not been investigated much. An ultrasound measurement method is the one of useful device for observation of such kind flows. In this report we mainly analyzed the process of transition to turbulent flow in higher Reynolds number by using the ultrasound measurement system.
