Inertial collapse of liquid rings

Abstract : Liquid rings can be generated in the Leidenfrost state using liquid oxygen of low boiling point (-183 degrees C) and high magnetic susceptibility, allowing one to 'sculpt' the liquid into a ring shape using an annular magnet. When the magnetic field is turned off, the ring shrinks back into a puddle with a constant acceleration. A potential flow approach accurately describes the dynamics of closure with an equation reminiscent of the Rayleigh-Plesset equation for the collapse of transient cavities.
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Baptiste Darbois Texier, Keyvan Piroird, David Quéré, Christophe Clanet. Inertial collapse of liquid rings. Journal of Fluid Mechanics, Cambridge University Press (CUP), 2013, 717, pp.R3. ⟨10.1017/jfm.2013.15⟩. ⟨hal-00996421⟩

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