Bi-Gaussian Stratified Wetting Model on Rough Surfaces
نویسندگان
چکیده
منابع مشابه
Anisotropy in the wetting of rough surfaces.
Surface roughness amplifies the water-repellency of hydrophobic materials. If the roughness geometry is, on average, isotropic then the shape of a sessile drop is almost spherical and the apparent contact angle of the drop on the rough surface is nearly uniform along the contact line. If the roughness geometry is not isotropic, e.g., parallel grooves, then the apparent contact angle is no longe...
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The contact angle of a drop in equilibrium on a solid is strongly affected by the roughness of the surface on which it rests. We study the roughness-induced enhancement of the hydrophobic or hydrophilic properties of a solid surface through homogenization theory. By relying on a variational formulation of the problem, we show that the macroscopic contact angle is associated with the solution of...
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The wetting properties of solid substrates with customary (i.e., macroscopic) random roughness are considered as a function of the microscopic contact angle of the wetting liquid and its partial pressure in the surrounding gas phase. Analytic expressions are derived which allow for any given lateral correlation function and height distribution of the roughness to calculate the wetting phase dia...
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We study a stationary wetting problem on rough and inhomogeneous solid surfaces. We derive a new formula for the apparent contact angle by asymptotic two-scale homogenization method. The formula is reduced to a modified Wenzel equation for geometrically rough surfaces and a modified Cassie equation for chemically inhomogeneous surfaces. Unlike the classical Wenzel and Cassie equations, the modi...
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After a brief presentation of the classical laws of wetting, we review di(erent phenomenological descriptions of rough wetting, i.e., show how these classical laws must be modi*ed on rough solids. This introduces the questions of hemi-wicking (can a *lm propagate inside the texture of a solid ?), rough *lms (is it possible for a liquid *lm to follow the roughness of a solid ?) and super-hydroph...
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ژورنال
عنوان ژورنال: Langmuir
سال: 2019
ISSN: 0743-7463,1520-5827
DOI: 10.1021/acs.langmuir.9b00107