Anisotropic Wetting of Hydrophobic and Hydrophilic Surfaces - Modelling by Lattice Boltzmann Method

被引：35

作者：

Kubiak, K. J. ^{[1
]}

Mathia, T. G. ^{[2
]}

机构：

[1] Univ Liverpool, Sch Engn, Liverpool L69 3GH, Merseyside, England

[2] Ecole Cent Lyon, LTDS CNRS UMR 5513, F-69134 Ecully, France

来源：

37TH NATIONAL CONFERENCE ON THEORETICAL AND APPLIED MECHANICS (37TH NCTAM 2013) & THE 1ST INTERNATIONAL CONFERENCE ON MECHANICS (1ST ICM) | 2014年 / 79卷

关键词：

Wetting; Roughness; Anisotropy; Lattice Boltzmann;

D O I：

10.1016/j.proeng.2014.06.307

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Anisotropic wetting on unidirectionally textured surfaces was investigated by Lattice Boltzmann Method. Previously published experimental data were used to validate the numerical model. New analysis were carried out by changing static contact angle of grooved surfaces from hydrophilic to hydrophobic (theta(s) = 50 - 150 degrees). Presented results suggests that anisotropic wetting on unidirectionally textured surfaces is governed by spreading along the grooves by capillary action and mainly is dominant in Wenzel state on hydrophilic surfaces. Transition to Cassie-Baxter state on hydrophobic surfaces (theta(s) > 90 degrees) significantly reduces the effect of anisotropic wetting. Structured texture and/or chemical heterogeneity can be potentially used to manipulate droplets in case of hydrophobic surfaces. (C) 2014 Elsevier Ltd.

引用

页码：45 / 48

页数：4

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