Article
Article
Fluid coating
Article By:
Quéré, David Physique de la Matiere Condensee, College de France, Paris, France.
Last reviewed:June 2020
DOI:https://doi.org/10.1036/1097-8542.802110
The operation of depositing a liquid film on a solid, due to a relative motion between them (Fig. 1). It occurs in many situations of everyday life as well as in numerous industrial processes. Examples include a water drop sliding on a window and leaving behind a trail; an object or a person coming out wet from a bath; or the emptying of a solid full of liquid (such as a glass containing water or a porous medium filled with oil), leaving some liquid inside the solid. In all these cases, an important practical question is the thickness of the film adhering to the solid. It may be desirable to control the thickness for coating purposes, or conversely to avoid a film altogether to keep the solid dry. To achieve this control, it is important to understand the parameters affecting the existence of such a film, and the laws of deposition.
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