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_GB |
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_GB |
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 |