EVOLUTION OF SINGLE ELLIPTIC VORTEX RINGS

作     者：Zhao, Y Shi, XG 

作者机构：Department of Mechanics and Engineering Science Peking University The State Key Laboratory for Turbulence Research Beijing China 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：1997年第13卷第1期

页      面：17-25页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：The project is supported by National Natural Science Foundation of China and Doctoral Program of Institution of Higher Education 

主　　题：elliptic vortex ring pseudo-spectral method bifurcation vortex reconnection 

摘      要：The evolution of single elliptic vortex rings for initial aspect ratio (AR) = 2,4,6 has been studied. 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 bifurcation occurs at certain AR. The processes of advection, interaction and decay of vortex ring are discussed. Numerical results coincide with experiments and other authors numerical simulation.