Numerical study of flow field induced by a locomotive fish in the moving meshes

In this paper, the equations of motion are solved together with the incompressible constraint condition to simulate the flow field induced by the two specified fish motions. Since the investigated flow/structure interaction varies with time, the analysis is conducted in the moving meshes. Within the arbitrary Lagrangian–Eulerian (ALE) framework, both the space conservation law and the geometric conservation law have been rigorously enforced on the discrete level. Grid points move along with the fish to facilitate the analysis of the induced flow field for revealing the interaction mechanism. The resulting wave and sinusoidal motions of the fish are addressed. Copyright q 2006 John Wiley & Sons, Ltd