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Licensed Unlicensed Requires Authentication Published by Oldenbourg Wissenschaftsverlag September 25, 2009

Floating criteria in three dimensions

  • Robert Finn and Thomas I. Vogel
From the journal


We extend to objects of general convex form an earlier criterion given by Finn for ensuring a local energy minimum corresponding to floating of a heavy horizontal cylinder on a liquid surface. We obtain a formal analogue of Finn´s criterion, and additionally a condition on interfacial surface energies under which an object of given shape with density exceeding that of the liquid must float if it is scaled to be sufficiently small. In analogy with Finn´s earlier work, we show also in the more physical case presently considered that if a body is lowered rigidly from a position above the undisturbed liquid surface to a position below the surface, the liquid configuration must change during the motion in a discontinuous way.

* Correspondence address: Stanford University , Mathematics Department, StanfordCA 94305-2125, U.S.A.,

Published Online: 2009-09-25
Published in Print: 2009-11

© by Oldenbourg Wissenschaftsverlag, München, Germany

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