Droplet evaporation in one-component fluids: Dynamic van der Waals theory

Abstract

In a one-component fluid, we investigate evaporation of a small axysymmetric liquid droplet in the partial wetting condition on a heated wall at $T\sim 0.9T_c$. In the dynamic van der Waals theory (Phys. Rev. E {\bf 75}, 036304 (2007)), 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.

6 pages, 6 figures

References in corpus (3)

• High-speed observation of the piston effect near the gas-liquid critical point
• Growth of a dry spot under a vapor bubble at high heat flux and high pressure
• Thermoacoustic effects in supercritical fluids near the critical point: Resonance, piston effect, and acoustic emission and reflection

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• Pre-dewetting transition on a hydrophobic wall: Statics and dynamics
• Density functional theory of gas-liquid phase separation in dilute binary mixtures