Abstract
A small fish like killifish makes a very sharp turn that is completed within only 0.1-second. Such a quick movement should be important for the fish robot or the high-speed underwater vehicles which are under progress in recent years. In this paper, 3-dimensional fluid dynamical simulation of a sharp turn is performed. Both fluid and the fish are treated as incompressible fluid. For advection term of NS-Equation , we use CIP method that is known as a high-accurate solver of advection equation. From the result, it is confirmed that a fish rotated and accelerated with the pressure generated by its own movement.
