Droplet evaporation in one-component fluids: Dynamic van der Waals theoryR. Teshigawara and A. Onuki
Department of Physics, Kyoto University - Kyoto 606-8502, Japan
received 15 June 2008; accepted in final form 18 September 2008; published November 2008
published online 17 October 2008
In a one-component fluid, we investigate evaporation of a small axysymmetric liquid droplet in the partial wetting condition on a heated wall at T~ 0.9Tc. In the dynamic van der Waals theory (Phys. Rev. E, 75 (2007) 036304), we take into account the latent-heat transport from liquid to gas upon evaporation. Along the gas-liquid interface, the temperature is nearly equal to the equilibrium coexisting temperature away from the substrate, but it rises sharply to the wall temperature close to the substrate. On an isothermal substrate, evaporation takes place mostly on a narrow interface region near the contact line in a late stage, which is a characteristic feature in one-component fluids.
68.03.Fg - Evaporation and condensation of liquids.
44.35.+c - Heat flow in multiphase systems.
61.46.-w - Structure of nanoscale materials.
© EPLA 2008