Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 12, 2016 - November 13, 2016
Aquatic animals shed the vortex by oscillating their fins. The propulsive forces of these animals are related to unsteady fluid forces accompanied with the movement of vortices. The aim of this study is to clarify the relationship between the unsteady fluid force and the vortex behavior. Experiments using a mechanically controlled monofin were carried out in a water flume. The effect of the vortex dynamics on the propulsive force was investigated by calculating the forces acting on the monofin from the momentum of vortex. The propulsive force during one oscillating cycle estimated from the vortex attached to the monofin surface has the same tendency of propulsive force measured by a load cell.
