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Wetting and spreading
| Content Provider | Semantic Scholar |
|---|---|
| Author | Bonn, Daniel Eggers, Jens Indekeu, Joseph O. Meunier, Jacques Rolley, Etienne |
| Copyright Year | 2008 |
| Abstract | Wetting phenomena are ubiquitous in nature and technology. A solid substrate exposed to the environment is almost invariably covered by a layer of fluid material. In this review, we first consider the surface forces that lead to wetting, and the equilibrium surface coverage of a substrate in contact with a drop of liquid. Depending on the nature of the surface forces involved, different scenarios for wetting phase transitions are possible; we show that recent progress allows to relate the critical exponents directly to the nature of surface forces which lead to the different wetting scenarios. Thermal fluctuation effects, which can be greatly enhanced for wetting of geometrically or chemically structured substrates, or are much stronger in colloidal suspensions, modify the adsorption singularities. Macroscopic descriptions and microscopic theories have been developed to understand and predict wetting behavior relevant to microand nanofluidics applications. The second part of the paper deals with the dynamics of wetting. A drop placed on a substrate which it wets, spreads out to form a film. Conversely, a non-wetted substrate previously covered by a film dewets upon an appropriate change of system parameters. The hydrodynamics of both wetting and dewetting is influenced profoundly by the presence of the three-phase contact line separating “wet” regions from those which are either dry or covered by a microscopic film only. We review recent theoretical, experimental, and numerical progress in the description of moving contact line dynamics, and explore its relation to the thermodynamics of wetting. In addition we survey recent progress on rough surfaces. We explore in detail the anchoring of contact lines and contact angle hysteresis, resulting from surface inhomogeneities. Further, we discuss new ways to mold wetting characteristics according to technological constraints, e.g., the use of patterned surfaces, surfactants or complex fluids. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.docum-enter.com/get/0UU8R7HlBJk_Kx2oVRsJYTO0santc7Twf3r9nCLm1os,/Wetting-and-spreading-Bristol.pdf |
| Alternate Webpage(s) | https://people.maths.bris.ac.uk/~majge/rmp.pdf |
| Alternate Webpage(s) | https://www.utwente.nl/en/tnw/pcf/education/j.m.burgerscentrum_research_school_for_fluid_mechanics/Articles/jacco_snoeijer/rmpwetting2009.pdf |
| Alternate Webpage(s) | http://www.maths.bris.ac.uk/~majge/rmp.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Description Filamentous fungus Hydrodynamics Hysteresis Kind of quantity - Equilibrium Liquid substance Numerical analysis Phase Transition Quantum fluctuation Rough set Substrate (electronics) Suspensions Thermodynamics |
| Content Type | Text |
| Resource Type | Article |
