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Vortex Pairs and Di...
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Gustafsson, Björn,1947-KTH,Matematik (Avd.)
(author)
Vortex Pairs and Dipoles on Closed Surfaces
- Article/chapterEnglish2022
Publisher, publication year, extent ...
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2022-07-01
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Springer Nature,2022
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Numbers
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LIBRIS-ID:oai:DiVA.org:kth-315724
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-315724URI
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https://doi.org/10.1007/s00332-022-09822-9DOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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QC 20220715
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We set up general equations of motion for point vortex systems on closed Riemannian surfaces, allowing for the case that the sum of vorticities is not zero and there hence must be counter-vorticity present. The dynamics of global circulations which is coupled to the dynamics of the vortices is carefully taken into account. Much emphasis is put to the study of vortex pairs, having the Kimura conjecture in focus. This says that vortex pairs move, in the dipole limit, along geodesic curves, and proofs for it have previously been given by S. Boatto and J. Koiller by using Gaussian geodesic coordinates. In the present paper, we reach the same conclusion by following a slightly different route, leading directly to the geodesic equation with a reparametrized time variable. In a final section, we explain how vortex motion in planar domains can be seen as a special case of vortex motion on closed surfaces.
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KTHMatematik (Avd.)
(creator_code:org_t)
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In:Journal of nonlinear science: Springer Nature32:50938-89741432-1467
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