Optimum Curvature Characteristics of Body/Caudal Fin Locomotion

Fish propelled by body and/or caudal fin (BCF) locomotion can achieve high-efficiency and high-speed swimming performance, changing their motion to interact with external fluids. This flexural be prescribed through its curvature profile. work indicates that when the fish swims high efficiency, amplitude reaches a maximum at peduncle. In case of swimming, shows three maxima on entire length. It is also demonstrated that, Reynolds number in range 104–106, speed, stride length, Cost Transport (COT) are all positively correlated tail-beat frequency. A sensitivity analysis explains which locations change most switches from mode mode. The comparison among kinds BCF optimal performance thunniform almost same as carangiform fish, while it better not neglect reaction force acting an anguilliform fish. study provides reference for control bionic future time.