Viscous mechanism for Leidenfrost propulsion on a ratchet

Abstract : An evaporating drop placed on a ratchet self-propels, as discovered by Linke et al. in 2006. Sublimating platelets do the same, and we discuss here a possible viscous mechanism for these motions. We report that the flow of vapor below the levitating material is rectified by the asymmetric teeth of the ratchet, in the direction of descending slopes along each tooth. As a consequence, the resulting viscous stress can entrain the material in the same direction, and we discuss the resulting self-propelling force. © Europhysics Letters Association.
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EPL - Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2011, 96 (5), pp.58001. 〈10.1209/0295-5075/96/58001〉
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Soumis le : lundi 2 juin 2014 - 17:20:11
Dernière modification le : mercredi 25 avril 2018 - 10:45:03

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G. Dupeux, M. Le Merrer, G. Lagubeau, Christophe Clanet, S. Hardt, et al.. Viscous mechanism for Leidenfrost propulsion on a ratchet. EPL - Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2011, 96 (5), pp.58001. 〈10.1209/0295-5075/96/58001〉. 〈hal-00998004〉

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