Evolution of Concentrated Vortices in a Viscous Fluid
作者:
E. A. BABKIN,
V. A. BRAILOVSKAYA,
D. CLAMOND,
PH. FRAUNIE,
YU. A. STEPANYANTS,
期刊:
International Journal of Computational Fluid Dynamics
(Taylor Available online 2000)
卷期:
Volume 13,
issue 2
页码: 185-202
ISSN:1061-8562
年代: 2000
DOI:10.1080/10618560008940897
出版商: Taylor & Francis Group
关键词: Viscous fluids;vortices;exact solutions;numerical study. Chaplygin-Lamb vortices;vortex interaction;vortex stability
数据来源: Taylor
摘要:
Evolution of the vortices of monopole and dipole types in a viscous fluid is considered numerically. Theory and numerical results are compared for some particular exact solutions. A good agreement is obtained for the dipole vortices (viscous Chaplygin-Lamb vortices) moving with variable velocities due to viscosity. For the monopole type vortices, the agreement is more or less good only at an initial stage of their evolution; while in the long-lime asymptotics the law of vorticity decay other than the theoretical one is discovered. The reason for such a discrepancy is discussed. The interactions of dipole vortices with each other and with rigid boundaries are studied too. The stability of dipole vortices with complex internal structures is considered briefly.
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