On the atmosphere of a moving body

Johan Rønby Pedersen, Hassan Aref

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearch

Abstract

We have explored whether a rigid body moving freely with no circulation around it in a two-dimensional ideal fluid can carry a fluid ``atmosphere'' with it in its motion. Somewhat surprisingly, the answer appears to be ``yes''. When the body is elongated and the motion is dominated by rotation, we demonstrate numerically that, indeed, regions of fluid follow the body in its motion. Since there is a double-island structure for the case of pure rotation, as already found by Morton and Darwin many years ago, we see the existence of an atmosphere for the moving body as an example of the stability of Kolmogorov-Arnold-Moser tori. Our observations were reported in {\it Physics of Fluids} {\bf 22} (2010) 057103. The presentation will include animations not published with the paper and some indications of further work.
Original languageEnglish
Title of host publicationBulletin of the American Physical Society
Volume55/16
Publication date2010
PagesBAPS.2010.DFD.LF.1
Publication statusPublished - 2010
Event63rd Annual Meeting, American Physical Society, Division of Fluid Dynamics : November 21–23 - Long Beach, California, USA
Duration: 1 Jan 2010 → …
Conference number: 63

Conference

Conference63rd Annual Meeting, American Physical Society, Division of Fluid Dynamics : November 21–23
Number63
CityLong Beach, California, USA
Period01/01/2010 → …

Cite this

Pedersen, J. R., & Aref, H. (2010). On the atmosphere of a moving body. In Bulletin of the American Physical Society (Vol. 55/16, pp. BAPS.2010.DFD.LF.1) http://meetings.aps.org/link/BAPS.2010.DFD.LF.1