摘要
Evolution of single elliptic vortex ring for initial aspect ratio (AR)=2,4,6, has been studied. The incompressible Navier-Stokes equations were solved by a dealiased pseudo-spectral method with 643 grid points in a period cube. It can find that there are three kinds of vortex motion as AR increases and the vortex bifurcation occurs at a certain AR. The processes of advection, interaction and decay of vortex ring were analysed. Numerical results coincide with the experiments and other numerical simulation.
Evolution of single elliptic vortex ring for initial aspect ratio (AR)=2,4,6, has been studied. The incompressible Navier-Stokes equations were solved by a dealiased pseudo-spectral method with 643 grid points in a period cube. It can find that there are three kinds of vortex motion as AR increases and the vortex bifurcation occurs at a certain AR. The processes of advection, interaction and decay of vortex ring were analysed. Numerical results coincide with the experiments and other numerical simulation.
