Near-critical spreading of droplets - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Nature Communications Année : 2022

Near-critical spreading of droplets

Résumé

We study the spreading of droplets in a near-critical phase-separated liquid mixture, using a combination of experiments, lubrication theory and finite-element numerical simulations. The classical Tanner's law describing the spreading of viscous droplets is robustly verified when the critical temperature is neared. Furthermore, the microscopic cut-off length scale emerging in this law is obtained as a single free parameter for each given temperature. In total-wetting conditions, this length is interpreted as the thickness of the thin precursor film present ahead of the apparent contact line. The collapse of the different evolutions onto a single Tanner-like master curve demonstrates the universality of viscous spreading before entering in the fluctuation-dominated regime. Finally, our results reveal a counter-intuitive and sharp thinning of the precursor film when approaching the critical temperature, which is attributed to the vanishing spreading parameter at the critical point.
Fichier principal
Vignette du fichier
Saiseau2022.pdf (2.08 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03739843 , version 1 (28-07-2022)
hal-03739843 , version 2 (07-10-2022)

Identifiants

Citer

Raphael Saiseau, Christian Pedersen, Anwar Benjana, Andreas Carlson, Ulysse Delabre, et al.. Near-critical spreading of droplets. Nature Communications, 2022, 13, pp.7442. ⟨hal-03739843v2⟩

Collections

CNRS LOMA ANR
73 Consultations
30 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More