A coaxial vortex ring model for vortex breakdown

Document Type

Article

Publication Date

11-15-2008

Abstract

A simple-yet plausible-model for B-type vortex breakdown flows is postulated; one that is based on the immersion of a pair of slender coaxial vortex rings in a swirling flow of an ideal fluid rotating around the axis of symmetry of the rings. It is shown that this model exhibits in the advection of passive fluid particles (kinematics) just about all of the characteristics that have been observed in what is now a substantial body of published research on the phenomenon of vortex breakdown. Moreover, it is demonstrated how the very nature of the fluid dynamics in axisymmetric breakdown flows can be predicted and controlled by the choice of the initial ring configurations and their vortex strengths. The dynamic intricacies produced by the two ring + swirl model are illustrated with several numerical experiments. © 2008 Elsevier B.V. All rights reserved.

Identifier

53249113439 (Scopus)

Publication Title

Physica D Nonlinear Phenomena

External Full Text Location

https://doi.org/10.1016/j.physd.2008.05.012

ISSN

01672789

First Page

2817

Last Page

2844

Issue

22

Volume

237

Fund Ref

V. Kann Rasmussen Foundation

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