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Self-similar collapse of three vortices in the generalised Euler and quasi-geostrophic equations
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dc.contributor.author | Reinaud, Jean Noel | |
dc.contributor.author | Dritschel, David Gerard | |
dc.contributor.author | Scott, Richard Kirkness | |
dc.date.accessioned | 2022-06-07T14:30:08Z | |
dc.date.available | 2022-06-07T14:30:08Z | |
dc.date.issued | 2022-06 | |
dc.identifier | 278102031 | |
dc.identifier | a906a950-2d60-420d-a8a8-4115a40e1045 | |
dc.identifier | 85126609365 | |
dc.identifier | 000791226600013 | |
dc.identifier.citation | Reinaud , J N , Dritschel , D G & Scott , R K 2022 , ' Self-similar collapse of three vortices in the generalised Euler and quasi-geostrophic equations ' , Physica D: Nonlinear Phenomena , vol. 434 , 133226 . https://doi.org/10.1016/j.physd.2022.133226 | en |
dc.identifier.issn | 0167-2789 | |
dc.identifier.other | ORCID: /0000-0001-5624-5128/work/110131480 | |
dc.identifier.other | ORCID: /0000-0001-5449-6628/work/110131499 | |
dc.identifier.other | ORCID: /0000-0001-6489-3395/work/110131510 | |
dc.identifier.uri | https://hdl.handle.net/10023/25501 | |
dc.description.abstract | We revisit the classical problem of the self-similar, finite-time collapse of three vortices. We extend the study to the generalised two-dimensional Euler equations as well as the generalised three-dimensional quasi-geostrophic equations. In both these situations, the flow is fully controlled by a materially-conserved field of a generalised vorticity (or potential vorticity) related to the streamfunction by a modified Poisson’s equation, in which the standard Laplacian is replaced by a fractional Laplacian. We first determine the conditions for the self-similar collapse of three point vortices, as well as the collapse time in a broad parameter space. We then consider the evolution of finite-core, two-dimensional and three-dimensional vortices under initial conditions corresponding to the collapse of equivalent point vortices. We show that the interaction precipitates the merger of the two like-signed vortices in the vortex triad. | |
dc.format.extent | 28 | |
dc.format.extent | 1866672 | |
dc.language.iso | eng | |
dc.relation.ispartof | Physica D: Nonlinear Phenomena | en |
dc.subject | Vortex dynamics | en |
dc.subject | Point vortices | en |
dc.subject | Vortex collapse | en |
dc.subject | Generalised Euler equations | en |
dc.subject | QA Mathematics | en |
dc.subject | QC Physics | en |
dc.subject | T-NDAS | en |
dc.subject.lcc | QA | en |
dc.subject.lcc | QC | en |
dc.title | Self-similar collapse of three vortices in the generalised Euler and quasi-geostrophic equations | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. Scottish Oceans Institute | en |
dc.contributor.institution | University of St Andrews. Applied Mathematics | en |
dc.contributor.institution | University of St Andrews. Marine Alliance for Science & Technology Scotland | en |
dc.identifier.doi | 10.1016/j.physd.2022.133226 | |
dc.description.status | Peer reviewed | en |
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