Hydrodynamic performance analysis of undulating fin propulsion

A desire to further comprehend the hydrodynamic characteristics of three-dimensional undulating fin propulsion is what motivates work. First, a high-resolution numerical technique based on constraint immersed boundary method utilized simulate fluid-fin system. The simulation results reveal fundamental variation laws between performance and kinematic parameters. According data, an in-depth analysis scaling law conducted. key contribution this work build force formula extend complicated cases involving different incoming flow velocities. important application that it can be used estimate self-propelled speed wave efficiency in conditions. show exhibits monotonically bounded increasing trend as amplitude grows, basically independent frequency, decreases with wavelength. Finally, discusses evolution vortex structures propulsion. indicates streamwise central jet formed throughout body primary reason for thrust generation Furthermore, basic dynamic mechanisms two types rings, related formation jet, are investigated macro-interaction mechanism fluid flow. findings could make explaining some biological phenomena developing bionic engineering.