General equation of wettability: A tool to calculate the contact angle for a rough surface
| Autor: | Anne-Marie Kietzig, Anjishnu Sarkar |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Work (thermodynamics)
Chemistry General Physics and Astronomy State (functional analysis) Mechanics Surface finish Energy minimization Condensed Matter::Soft Condensed Matter Physics::Fluid Dynamics Contact angle Wetting transition Computational chemistry Intermediate state Wetting Physical and Theoretical Chemistry Physics::Atmospheric and Oceanic Physics |
| Zdroj: | Chemical Physics Letters. 574:106-111 |
| ISSN: | 0009-2614 |
| DOI: | 10.1016/j.cplett.2013.04.055 |
| Popis: | This work introduces a mathematical tool, namely general equation of wettability, which simplifies the determination of the contact angle for rough surfaces. A free energy minimization method is applied to an intermediate wetting state with partial liquid penetration into roughness valleys in addition to the well-known states of Wenzel and Cassie wetting. A wetting parameter is coined, which stands out as a fingerprint of a particular wetting state of a surface topology. Substitution of the appropriate wetting parameter returns the Cassie and Wenzel equations, while an implicit solution is presented for the intermediate state, which is consistent with energy minimization. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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