On the persistence of non-axisymmetric vortices in inviscid two-dimensional flows
UNSPECIFIED (1998) On the persistence of non-axisymmetric vortices in inviscid two-dimensional flows. JOURNAL OF FLUID MECHANICS, 371 . pp. 141-155. ISSN 0022-1120Full text not available from this repository.
Previous research has suggested that isolated, initially non-axisymmetric vortices in two-dimensional flows tend to become axisymmetric, in a coarse-grained sense, by purely inviscid mechanisms. That research, however, considered only vortices with broadly distributed vorticity. In this paper, it is shown that vortices with sufficiently steep edge gradients behave in a radically different way; in particular they can remain non-axisymmetric, apparently indefinitely. Such vortices, it is argued, are more typical in inviscid two-dimensional flows than the broadly distributed vortices previously considered, and hence the tendency for vortices to become axisymmetric is not generic to these flows.
|Item Type:||Journal Article|
|Subjects:||T Technology > TJ Mechanical engineering and machinery
Q Science > QC Physics
|Journal or Publication Title:||JOURNAL OF FLUID MECHANICS|
|Publisher:||CAMBRIDGE UNIV PRESS|
|Date:||25 September 1998|
|Number of Pages:||15|
|Page Range:||pp. 141-155|
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