CFD Simulation of Effect of Vortex Ring for Squid Jet Propulsion
Using jet propulsion, squid can swim at high speed with good maneuverability, which makes them quiet valuable to be studied for biomimetic purposes. Vortex rings usually occur in the highly-unsteady jet flow in squid, and they play quite important roles in the jet propulsion. This paper tries to investigate the squid jet structure by computational fluid dynamics (CFD) analysis. A simplified squid body model was established. The mantle motion during jet locomotion was explicitly included into the simulations by using a deforming mesh. By solving the 2D-axisymmetric, incompressible, laminar, unsteady Navier-Stokes equations, different vortex evolution behaviors were observed depending on different mantle contraction velocities and nozzle diameters. An important parameter, the formation number of the vortex rings, L/D, which decide the propulsive efficiency of jet propulsion directly, was also discussed in this paper. Interaction of vortex rings was simulated in two jet process, which might interpret squid increase their contraction frequencies with elevated swimming speed.
Squid CFD Simulation Jet propulsion Deforming mesh Vortex rings
Zhenlong Wang Jian Li Yangwei Wang Fei Gao
State Key Laboratory of Robotics and System Harbin Institute of technology (HIT) Harbin,China
国际会议
太原
英文
140-144
2011-02-26（万方平台首次上网日期，不代表论文的发表时间）