仿蝌蚪游动的数值研究
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摘要
通过求解三维粘性非定常不可压缩流体Navier-Stokes方程组,数值模拟了仿蝌蚪游动时的水动力学特性和流场特征,分析了蝌蚪摆动频率和雷诺数等运动参数和流场条件对蝌蚪游动的影响.此外,探讨了蝌蚪特有的钝体头部以及摆动方式的影响.结果表明,蝌蚪游动时不同的受力状态对应于不同的尾涡结构特征.蝌蚪特殊的运动方式与其特殊的体态特征是相匹配的.
In this study, bio-inspired tadpole swimming is investigated numerically by solving the three-dimensional Navier-Stokes equations for the unsteady incompressible viscous flow. The hydrodynamics and vortex structures in the flow field are analyzed.The influence of various controllable parameters is studied. Also, the effect of tadpole's blunt snout and its specific kinematics is discussed in detail. The results show that the wake vortex structures vary with the fluid force on the tadpole. In addition, the kinematics of tadpoles is closely matched to their special shape.
In this study, bio-inspired tadpole swimming is investigated numerically by solving the three-dimensional Navier-Stokes equations for the unsteady incompressible viscous flow. The hydrodynamics and vortex structures in the flow field are analyzed.The influence of various controllable parameters is studied. Also, the effect of tadpole's blunt snout and its specific kinematics is discussed in detail. The results show that the wake vortex structures vary with the fluid force on the tadpole. In addition, the kinematics of tadpoles is closely matched to their special shape.
引文
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[3]WASSERSUG R J.Locomotion in amphibian larvae(or“Why aren't tadpoles built like fishes?”)[J].American Zoologist,1989,29(1):65-84.
[4]LIU H,WASSERSUG R J,KAWACHI K.A computational fluid dynamics study of tadpole swimming[J].The Journal of Experimental Biology,1996,199(6):1245-1260.
[5]LIU H,WASSERSUG R J,KAWACHI K.The three-dimensional hydrodynamics of tadpole locomotion[J].The Journal of Experimental Biology,1997,200(22):2807-2819.
[6]AZIZI E,LANDBERG T,WASSERSUG R J.Vertebral function during tadpole locomotion[J].Zoology,2007,110(4):290.
[7]HOFF K,WASSERSUG R J.Tadpole locomotion:axial movement and tail functions in a largely vertebraelessvertebrate[J].American Zoologist,2000,40(1):62-76.
[8]K?HLER G,LEHR E,MCCRANIE J R.The tadpole of the Central American toad BufoluetkeniiBoulenger[J].Journal of Herpetology,2000,34(2):303-306.
[9]YUAN H T,HU W R.A numerical study on tadpole swimming in the wake of a D-section cylinder[J].Journal of Hydrodynamics,Ser.B,2017,29(6):1044-1053.
[10]张仕栋,胡文蓉.仿生波状前缘机翼拍动运动动态失速控制的数值研究[J].水动力学研究与进展,2015,30(1):24-32.
[11]WASSERSUG R J.Where the tadpole meets the world-observations and speculations on biomechanical and biochemical factors that influence metamorphosis in anurans[J].Integrative&Comparative Biology,1997,37(2):124-136.
[2]WASSERSUG R J,HOFF K.The kinematics of swimming in anuran larvae[J].Journal of Experimental Biology,1985,119(1):1-30.
[3]WASSERSUG R J.Locomotion in amphibian larvae(or“Why aren't tadpoles built like fishes?”)[J].American Zoologist,1989,29(1):65-84.
[4]LIU H,WASSERSUG R J,KAWACHI K.A computational fluid dynamics study of tadpole swimming[J].The Journal of Experimental Biology,1996,199(6):1245-1260.
[5]LIU H,WASSERSUG R J,KAWACHI K.The three-dimensional hydrodynamics of tadpole locomotion[J].The Journal of Experimental Biology,1997,200(22):2807-2819.
[6]AZIZI E,LANDBERG T,WASSERSUG R J.Vertebral function during tadpole locomotion[J].Zoology,2007,110(4):290.
[7]HOFF K,WASSERSUG R J.Tadpole locomotion:axial movement and tail functions in a largely vertebraelessvertebrate[J].American Zoologist,2000,40(1):62-76.
[8]K?HLER G,LEHR E,MCCRANIE J R.The tadpole of the Central American toad BufoluetkeniiBoulenger[J].Journal of Herpetology,2000,34(2):303-306.
[9]YUAN H T,HU W R.A numerical study on tadpole swimming in the wake of a D-section cylinder[J].Journal of Hydrodynamics,Ser.B,2017,29(6):1044-1053.
[10]张仕栋,胡文蓉.仿生波状前缘机翼拍动运动动态失速控制的数值研究[J].水动力学研究与进展,2015,30(1):24-32.
[11]WASSERSUG R J.Where the tadpole meets the world-observations and speculations on biomechanical and biochemical factors that influence metamorphosis in anurans[J].Integrative&Comparative Biology,1997,37(2):124-136.