Successive instabilities of confined Leidenfrost puddles
1 PMMH, UMR 7636, ESPCI - 75005 Paris, France LadHyX, UMR 7646 École polytechnique - 91128 Palaiseau, France
Received: 24 July 2015
Accepted: 14 October 2015
A Leidenfrost drop confined between two hot plates is unstable, if large enough. After a short delay to build a central vapor pocket, it forms a ring which rapidly expands and eventually bursts. We analyze this sequence of instabilities theoretically, and show that the ring size increases in a non-linear manner as a function of time, in agreement with experiments.
PACS: 68.03.Cd – Surface tension and related phenomena / 68.03.Fg – Evaporation and condensation of liquids / 47.55.D- – Drops and bubbles
© EPLA, 2015