NUMERICAL-SIMULATION OF TRIPOLAR VORTICES IN 2D FLOW

被引：85

作者：

ORLANDI, P

VANHEIJST, GF

机构：

[1] Department of Mechanics and Aeronautics, University of Rome La Sapienza, 00184 Rome

[2] J.M. Burgers Centre for Fluid Mechanics, Department of Technical Physics, Eindhoven University of Technology, 5600 MB Eindhoven, W and S Building

来源：

FLUID DYNAMICS RESEARCH | 1992年 / 9卷 / 04期

关键词：

D O I：

10.1016/0169-5983(92)90004-G

中图分类号：

O3 [力学];

学科分类号：

08 [工学]; 0801 [力学];

摘要：

The formation of a tripolar vortex in a two-dimensional flow is simulated numerically for two different cases, viz. the tripole arising from a collision of two Lamb dipoles, and the emergence of a tripole from an initially axisymmetric, unstable vortex. This latter situation was also considered in a laboratory experiment by van Heijst, Kloosterziel and Williams, and the numerical results show very good agreement with their observations, both qualitatively and quantitatively. Under certain conditions a higher wavenumber instability is found, resulting in a triangular vortex which itself turns out to be unstable. The results of the numerical simulation agree fairly well with laboratory observations of this higher-order instability scenario.

引用

页码：179 / 206

页数：28

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