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How can vorticity be produced in irrotationally forced flows?
Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Stockholm University, Faculty of Science, Department of Astronomy.
2010 (English)In: Proceedings of the International Astronomical Union, ISSN 1743-9213, E-ISSN 1743-9221, Vol. 6, 373-375 p.Article in journal (Refereed) Published
Abstract [en]

A spherical hydrodynamical expansion flow can be described as the gradient of a potential. In that case no vorticity should be produced, but several additional mechanisms can drive its production. Here we analyze the effects of baroclinicity, rotation and shear in the case of a viscous fluid. Those flows resemble what happens in the interstellar medium. In fact in this astrophysical environment supernovae explosion are the dominant flows and, in a first approximation, they can be seen as spherical. One of the main difference is that in our numerical study we examine only weakly supersonic flows, while supernovae explosions are strongly supersonic.

Place, publisher, year, edition, pages
2010. Vol. 6, 373-375 p.
Keyword [en]
Galaxies: magnetic fields, ISM: bubbles
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-70503DOI: 10.1017/S1743921311007307OAI: oai:DiVA.org:su-70503DiVA: diva2:481692
Note
Advances in Plasma Astrophysics, ed. Proc. IAU, Vol. 6, IAU Symp. S274, A. Bonanno, E. de Gouveia dal Pino, & A. KosovichevAvailable from: 2012-01-22 Created: 2012-01-22 Last updated: 2017-12-08Bibliographically approved

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Sordo, Fabio DelBrandenburg, Axel
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