par Sobac, Benjamin 
;Rednikov, Alexei ;Dorbolo, Stéphane;Colinet, Pierre
Référence Physical review. E, Statistical, nonlinear, and soft matter physics, 90, 053011
Publication Publié, 2014-11-21
;Rednikov, Alexei ;Dorbolo, Stéphane;Colinet, Pierre Référence Physical review. E, Statistical, nonlinear, and soft matter physics, 90, 053011
Publication Publié, 2014-11-21
Article révisé par les pairs
| Résumé : | We here present a simple fitting-parameter-free theory of the Leidenfrost effect (droplet levitation above a superheated plate) covering the full range of stable shapes, i.e. from small quasi-spherical droplets to larger puddles floating on a pocket-like vapor film. The geometry of this film is found to be in excellent quantitative agreement with the interferometric measurements of Burton et al. [Phys. Rev. Lett. 109, 074301 (2012)]. We also obtain new scalings generalizing classical ones derived by Biance et al. [Phys. Fluids 15, 1632 (2003)] as far as the effect of plate superheat is concerned, and highlight the relative role of evaporation, gravity and capillarity in the vapor film. To further substantiate these findings, a treatment of the problem by matched asymptotic expansions is also presented. |
