Anisotropic wetting of hydrophobic and hydrophilic surfaces - Modelling by Lattice Boltzmann Method

K. J. Kubiak; T. G. Mathia

doi:10.1016/j.proeng.2014.06.307

Anisotropic wetting of hydrophobic and hydrophilic surfaces - Modelling by Lattice Boltzmann Method

K. J. Kubiak, T. G. Mathia

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

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 (θ_s = 50-150°). Presented results suggests that anisotropic wetting on unidirectionally textured surfaces is governed by spreading along the grooves by capillary action and mainly is dominant inWenzel state on hydrophilic surfaces. Transition to Cassie-Baxter state on hydrophobic surfaces (θ_s > 90°) 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.

Original language	English
Pages (from-to)	45-48
Number of pages	4
Journal	Procedia Engineering
Volume	79
Early online date	15 Nov 2014
DOIs	https://doi.org/10.1016/j.proeng.2014.06.307
Publication status	Published - 15 Nov 2014
Externally published	Yes

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10.1016/j.proeng.2014.06.307Licence: CC BY-NC-ND

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title = "Anisotropic wetting of hydrophobic and hydrophilic surfaces - Modelling by Lattice Boltzmann Method",

abstract = "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 (θs = 50-150°). Presented results suggests that anisotropic wetting on unidirectionally textured surfaces is governed by spreading along the grooves by capillary action and mainly is dominant inWenzel state on hydrophilic surfaces. Transition to Cassie-Baxter state on hydrophobic surfaces (θs > 90°) 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.",

keywords = "Anisotropy, Lattice Boltzmann, Roughness, Wetting",

author = "Kubiak, {K. J.} and Mathia, {T. G.}",

year = "2014",

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AU - Kubiak, K. J.

AU - Mathia, T. G.

PY - 2014/11/15

Y1 - 2014/11/15

N2 - 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 (θs = 50-150°). Presented results suggests that anisotropic wetting on unidirectionally textured surfaces is governed by spreading along the grooves by capillary action and mainly is dominant inWenzel state on hydrophilic surfaces. Transition to Cassie-Baxter state on hydrophobic surfaces (θs > 90°) 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.

AB - 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 (θs = 50-150°). Presented results suggests that anisotropic wetting on unidirectionally textured surfaces is governed by spreading along the grooves by capillary action and mainly is dominant inWenzel state on hydrophilic surfaces. Transition to Cassie-Baxter state on hydrophobic surfaces (θs > 90°) 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.

KW - Anisotropy

KW - Lattice Boltzmann

KW - Roughness

KW - Wetting

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DO - 10.1016/j.proeng.2014.06.307

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VL - 79

SP - 45

EP - 48

JO - Procedia Engineering

JF - Procedia Engineering

SN - 1877-7058

ER -

Anisotropic wetting of hydrophobic and hydrophilic surfaces - Modelling by Lattice Boltzmann Method

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