## On the atmosphere of a moving body

Publication: ResearchConference abstract in proceedings – Annual report year: 2010

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 language English Bulletin of the American Physical Society 55/16 2010 BAPS.2010.DFD.LF.1 Published - 2010

### Conference

Conference 63rd Annual Meeting, American Physical Society, Division of Fluid Dynamics : November 21–23 63 Long Beach, California, USA 01/01/2010 → …
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