Research on swimming performance of fish in different species

Manta rays and tunas are outstanding representatives of propulsion by MPF (median and/or paired fin) BCF (body caudal fin), respectively, it is an interesting topic to see what kind fluid effects will be generated when they meet during the swimming process. In present study, numerical simulations were performed for individual state manta ray/tuna group ray tuna in a tandem arrangement. conditions, increasing amplitude helps improve thrust wave number efficiency; frequency, increases monotonically efficiency first then decreases. state, enhanced at most spacings, smaller spacing, greater enhancement, as seen vortex structure, which benefits from merging rear wake. The curves fluctuate greatly with related position wake field where located.