Freely-swimming vs Tethered
In this numerical study, we designed the caudal fin as a rigid body for a freely-swimming fish undergoing combined pitch and heave motion. Further, we compared its performance to the thrust and efficiency of a tethered fin. Our results indicated that the phase offset between pitch and heave corresponding to optimal performance for a freely-swimming fin differ from tethered fin.
In this numerical study, we designed the caudal fin as a rigid body for a freely-swimming fish undergoing combined pitch and heave motion. Further, we compared its performance to the thrust and efficiency of a tethered fin. Our results indicated that the phase offset between pitch and heave corresponding to optimal performance for a freely-swimming fin differ from tethered fin.