Leidenfrost Dynamics

• David Quéré ^[1]
  1. [1] Physique et Mécanique des Milieux Hétérogènes, CNRS UMR 7636, ESPCI, France
• Localización: Annual review of fluid mechanics, ISSN 0066-4189, Nº. 45, 2013, págs. 197-215
• Idioma: inglés
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• Resumen

  • This review discusses how drops can levitate on a cushion of vapor when brought in contact with a hot solid. This is the so-called Leidenfrost phenomenon, a dynamical and transient effect, as vapor is injected below the liquid and pressed by the drop weight. The absence of solid/liquid contact provides unique mobility for the levitating liquid, contrasting with the usual situations in which contact lines induce adhesion and enhanced friction: hence a frictionless motion, and the possibility of bouncing after impact. All these characteristics can be combined to create devices in which self-propulsion is obtained, using asymmetric textures on the hot solid surface.