| EVOLUTION OF SINGLE ELLIPTIC VORTEX RING |
| |
| 作者姓名： | Zhao Yao Shi Xungang
State Key Laboratory for Turbulence Research |
| |
| 作者单位： | Zhao Yao，Shi Xungang
State Key Laboratory for Turbulence Research，Department of Mechanics and Engineering Science，Peking University，Beijing 100871，P. R. China，E mail; zhaoy @ sord. mech. nwu.edu |
| |
| 摘 要： | ABSTRACT:We study the evolution of single elliptic vortex ring for initial aspect ratio(AR)=2,4,6.The incompressible Navier-Stokes equations are solved by a dealiased pseudo-spectral method with 64~3 grid points in a periodic cube.We find that there are three kinds of vortex motion as AR increases and vortex bifurcation occurs at a certain AR.The processes of advection,interaction,and decay of vortex ring are analyzed.Numerical results coincide with experiments and other numerical simulations.
|
EVOLUTION OF SINGLE ELLIPTIC VORTEX RING |
| |
| Zhao Yao,Shi Xungang
State Key Laboratory for Turbulence Research,.EVOLUTION OF SINGLE ELLIPTIC VORTEX RING[J].Journal of Hydrodynamics,1998(1). |
| |
| Authors: | Zhao Yao Shi Xungang
State Key Laboratory for Turbulence Research |
| |
| Institution: | Zhao Yao,Shi Xungang
State Key Laboratory for Turbulence Research,Department of Mechanics and Engineering Science,Peking University,Beijing 100871,P. R. China,E mail, zhaoy @ sord. mech. nwu.edu |
| |
| Abstract: | We study the evolution of single elliptic vortex ring for initial aspect ratio (AR)= 2.4,6 . The incompressible Navier-Stokes equations are solved by a dealiased pseudo-spectral method with 643 grid points in a periodic cube. We find that there are three kinds of vortex motion as AR increases and vortex bifurcation occurs at a certain AR The processes of advection, interaction, and decay of vortex ring are analyzed. Numerical results coincide with experiments and other numerical simulations. |
| |
| Keywords: | elliptic vortex ring DNS pseudo-spectral method bifurcation cut-re-connection |
| 本文献已被 CNKI 等数据库收录！ |
