仿生水母推进的数值模拟研究  

Numerical study on the propulsion of a biomimetic jellyfish

作　　者：张厚臻 余钊圣[1] 邵雪明[1] 

机构地区：[1]浙江大学力学系,杭州310027

出　　处：《水动力学研究与进展（A辑）》2016年第3期327-333,共7页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金资助(11372275)~~

摘　　要：该文采用虚拟区域方法对两维仿生水母模型在流体中推进时的流固耦合作用进行了数值模拟,研究了流体动力黏度和水母弹性模量等参数对水母运动的影响。研究结果表明:水母的游动与尾流涡环密切相关,受到起始涡环和停滞涡环的双重影响;水母的运动速度随着黏性的增大而减小,呈现两段斜率不同的幂指关系,而弹性模量的增大使得水母运动速度大致呈线性减小,并且可能使得水母出现倒退运动。A 2D numerical simulation of fluid-structure interactions in the propulsion of a biomimetic jellyfish is conducted with the fictitious domain method. The effects of the fluid dynamics viscosity and the elastic modulus of the medusa on the swimming motion are investigated. The results indicate that the propulsion of the jellyfish is significantly affected by the starting and stopping vortices. The mean velocity of the jelllyfish decreases with increasing viscosity in two different power-law scalings for low and high viscosities. The velocity of jellyfish descends linear with increasing elastic modulus, and can be negative when the elastic modulus is sufficiently large.

关 键 词：仿生水母 流固耦合 数值模拟 虚拟区域方法 涡环 

分 类 号：Q811[生物学—生物工程]