Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2010-05-05
Physics
Condensed Matter
Soft Condensed Matter
12 pages, 14 figures
Scientific paper
We investigate the dynamics of spreading of a small liquid droplet in gas in a one-component simple fluid, where the temperature is inhomogeneous around 0.9Tc and latent heat is released or generated at the interface upon evaporation or condensation (with Tc being the critical temperature). In the scheme of the dynamic van der Waals theory, the hydrodynamic equations containing the gradient stress are solved in the axisymmetric geometry. We assume that the substrate has a finite thickness and its temperature obeys the thermal diffusion equation. A precursor film then spreads ahead of the bulk droplet itself in the complete wetting condition. Cooling the substrate enhances condensation of gas onto the advancing film, which mostly takes place near the film edge and can be the dominant mechanism of the film growth in a late stage. The generated latent heat produces a temperature peak or a hot spot in the gas region near the film edge. On the other hand, heating the substrate induces evaporation all over the interface. For weak heating, a steady-state circular thin film can be formed on the substrate. For stronger heating, evaporation dominates over condensation, leading to eventual disappearance of the liquid region.
Onuki Akira
Teshigawara Ryohei
No associations
LandOfFree
Spreading with evaporation and condensation in one-component fluids does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spreading with evaporation and condensation in one-component fluids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spreading with evaporation and condensation in one-component fluids will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-438096