Leidenfrost films
David Quéré
Physique et Méchanique des Milieux Hétérogènes
Laboratoire Hydrodynamique et Mécanique Physique de l'ESPCI
ParisTech
Abstract:
In 1756, Leidenfrost discovered how drops can levitate on hot solids, owing to the formation of a vapor cushion. After discussing the characteristics of this film, we present less classical features:
1) how a Leidenfrost liquid (and even solid!) are likely to self-propel on a ratchet;
2) how a kind of dynamic Leidenfrost situation can arise from the shock of a liquid on itself.
Other contributors:
1) A.L. Biance, C. Clanet, G. Lagubeau & M. Le Merrer;
2) E. Lorenceau and E. Reyssat.