Vortex motion in a weak background shear flow

DSpace/Manakin Repository

Open Research Exeter (ORE)

Vortex motion in a weak background shear flow

Show simple item record

dc.contributor.author Bajer, Konrad en_GB
dc.contributor.author Bassom, Andrew P. en_GB
dc.contributor.author Gilbert, Andrew D. en_GB
dc.date.accessioned 2009-03-17T14:52:02Z en_GB
dc.date.accessioned 2011-01-25T10:33:32Z en_US
dc.date.accessioned 2013-03-20T12:27:29Z
dc.date.issued 2004 en_GB
dc.description.abstract A point vortex is introduced into a weak background vorticity gradient at finite Reynolds number. As the vortex spreads viscously so the background vorticity becomes wrapped around it, leading to enhanced diffusion of vorticity, but also giving a feedback on the vortex and causing it to move. This is investigated in the linear approximation, using a similarity solution for the advection of weak vorticity around the vortex, at finite and infinite Reynolds number. A logarithmic divergence in the far field requires the introduction of an outer length scale $L$ and asymptotic matching. In this way results are obtained for the motion of a vortex in a weak vorticity field modulated on the large scale $L$ and these are confirmed by means of numerical simulations. en_GB
dc.identifier.citation Vol. 509, pp. 281-304 en_GB
dc.identifier.doi 10.1017/S0022112004009395 en_GB
dc.identifier.uri http://hdl.handle.net/10036/55954 en_GB
dc.language.iso en en_GB
dc.publisher Cambridge University Press en_GB
dc.relation.url http://dx.doi.org/10.1017/S0022112004009395 en_GB
dc.relation.url http://www.journals.cambridge.org/abstract_S0022112004009395 en_GB
dc.title Vortex motion in a weak background shear flow en_GB
dc.type Article en_GB
dc.date.available 2009-03-17T14:52:02Z en_GB
dc.date.available 2011-01-25T10:33:32Z en_US
dc.date.available 2013-03-20T12:27:29Z
dc.identifier.issn 0022-1120 en_GB
dc.identifier.issn 1469-7645 en_GB
dc.description Copyright © 2004 Cambridge University Press. Published version reproduced with the permission of the publisher. en_GB
dc.identifier.journal Journal of Fluid Mechanics en_GB


Files in this item

Files Size Format View
Vortex motion.pdf 284.9Kb PDF Thumbnail

This item appears in the following Collection(s)

Show simple item record

Browse

My Account

Local Links