| Autor: |
Mathieu Sellier, Carlos Alberto Perazzo, P. G. Correa, J. M. Gomba, Jonatan Raúl Mac Intyre |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
IUTAM Symposium on Recent Advances in Moving Boundary Problems in Mechanics ISBN: 9783030137199 |
| Popis: |
We study the behaviour of two-dimensional droplets of partially wetting liquids driven by thermocapillary forces. A sessile droplet over a non-uniformly heated surface undergoes a shear stress along the surface of the liquid that moves the droplet from warmer to colder regions. By means of a two-term disjoining pressure model with a single stable energy minimum, we introduce the effect of a non-zero contact angle and two different models are compared. Polar liquids are modelled using London–van der Waals and ionic-electrostatics molecular interactions and, non-polar fluids with long- and short-range molecular forces. The droplet dynamics model is based on the lubrication approximation and the resulting partial differential equation is solved in the Finite Element package COMSOL Multiphysics. As a result of a parametric study on the contact angle, we characterize three different regimes. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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