Dynamics of complete wetting liquid under evaporation

Chi-Tuong Pham (1) , Guillaume Berteloot (2) , Francois Lequeux (3) , Laurent Limat (2)

1 LIMSI - Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur
2 MSC - Matière et Systèmes Complexes
3 PPMD - Laboratoire de Physico-Chimie des Polymères et des Milieux Dispersés

The dynamics of a contact line under evaporation and total wetting conditions is studied taking into account the divergent nature of evaporation near the border of the liquid, as evidenced by Deegan et al. [Nature 389, 827 (1997)]. Complete wetting is assumed to be due to Van der Waals interactions. The existence of a precursor film at the edge of the liquid is shown analytically and numerically. The length of the precursor film is controlled by Hamacker constant and evaporative flux. Past the precursor film, Tanner's law is generalized accounting for evaporative effects.

Domaines: Matière Molle [cond-mat.soft]; Mécanique des fluides [physics.class-ph]; Milieux fluides et réactifs

Chi-Tuong Pham, Guillaume Berteloot, Francois Lequeux, Laurent Limat. Dynamics of complete wetting liquid under evaporation. EPL - Europhysics Letters, 2010, 92 (5), pp.54005. ⟨10.1209/0295-5075/92/54005⟩. ⟨hal-02377513⟩