Dewetting
Sign in to saveIn fluid mechanics, dewetting is one of the processes that can occur at a solid–liquid, solid–solid, or liquid–liquid interface. Generally, dewetting describes the process of retraction of a fluid from a non-wettable surface it was forced to cover. The opposite process—spreading of a liquid on a substrate—is called wetting. The factor determining the spontaneous spreading and dewetting for a drop of liquid placed on a solid substrate with ambient gas, is the so-called spreading coefficient : thumb|right|Surface tension diagram of a liquid droplet on a solid substrate. The surface of the liqui
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In fluid mechanics, dewetting is one of the processes that can occur at a solid–liquid, solid–solid, or liquid–liquid interface. Generally, dewetting describes the process of retraction of a fluid from a non-wettable surface it was forced to cover. The opposite process—spreading of a liquid on a substrate—is called wetting. The factor determining the spontaneous spreading and dewetting for a drop of liquid placed on a solid substrate with ambient gas, is the so-called spreading coefficient : thumb|right|Surface tension diagram of a liquid droplet on a solid substrate. The surface of the liquid has the shape of a spherical cap, due to [[Laplace pressure]] S\ = \gamma_\text{SG} - \gamma_\text{SL} - \gamma_\text{LG}
where is the solid-gas surface tension, is the solid-liquid surface tension and is the liquid-gas surface tension (measured for the mediums before they are brought in contact with each other).