Kinetic effects regularize the mass-flux singularity at the contact line of a thin evaporating drop.

ABSTRACT: We consider the transport of vapour caused by the evaporation of a thin, axisymmetric, partially wetting drop into an inert gas. We take kinetic effects into account through a linear constitutive law that states that the mass flux through the drop surface is proportional to the difference between the vapour concentration in equilibrium and that at the interface. Provided that the vapour concentration is finite, our model leads to a finite mass flux in contrast to the contact-line singularity in the mass flux that is observed in more standard models that neglect kinetic effects. We perform a local analysis near the contact line to investigate the way in which kinetic effects regularize the mass-flux singularity at the contact line. An explicit expression is derived for the mass flux through

SUBMITTER: Saxton MA 

PROVIDER: S-EPMC6961504 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature