Fluid simulation around tail fin of a fish robot

Currently, have been developed a variety of fish-like robot, such as marine research and development, and has been active in various fields. Many fish robots have obtained a driving force by moving the tail fin. Therefore revealing the water flow around the tail fin is very important. In this study, the newly developed fluid analysis technique when the flow path wall shape changes. Furthermore, by applying this analysis technique, it was clarified water flow caused by the moving tail fin of the fish robot. Also, the driving force acting on the robot by the resulting water flow was calculated. Tail fin shape and its moving way to obtain appropriate driving force can be clarified by these analysis.