 | Nanotech 2002 Vol. 1
Technical Proceedings of the 2002 International Conference on Modeling and Simulation of Microsystems
Chapter 2: Micro and Nano Fluidic Systems |
| | Numerical Simulation of Droplet Shapes on Rough Surfaces |
| Authors: | N.A. Patankar and Y. Chen |
| Affilation: | Northwestern University, USA |
| Pages: | 116 - 119 |
| Keywords: | superhydrophobicity, contact angle, roughness, drop, numerical simulation |
| Abstract: | It has been demonstrated that surface roughness causes superhydrophobicity. Our objective is to develop a numerical tool and study the relationship between the roughness characteristics and the apparent contact angle and motion of liquid drops on rough surfaces. As a first step we consider a stationary drop on a substrate with a simple geometry of horizontal grooves. A public domain software is modified to numerically investigate the 3D equilibrium drop shapes on a rough surface. We observe that a drop of given volume and actual contact angle attains different equilibrium positions on a rough substrate. The energies and the apparent contact angles of each equilibrium state are different. The actual contact angle in our simulations was 90o. It was also seen that for higher values of actual contact angles the liquid tends to move out of the grooves thus leading to the formation of a composite surface of contact on the substrate. |
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| ISBN: | 0-9708275-7-1 |
| Pages: | 764 |
| Hardcopy: | $100.00 |
| Special: | 3 CD Set — 15% off with Free Shipping |
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