The kinetics of wetting: the dynamic contact angle

Bracke, Marianne Stowell; Voeght, F. De; Joos, P.

doi:10.1007/bfb0116200

Cited by 155 publications

(145 citation statements)

References 24 publications

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“…Over the last several decades, researchers have introduced various semi empirical correlations to describe the velocity-dependence of dynamic contact angle [12][13][14][15] . A proposed accurate empirical correlation is given by 13,16 cos cos cos ,…”

Section: Advancing Contact Anglementioning

confidence: 99%

Capillary Dynamics of Water/Ethanol Mixtures

Amador

Jia

Ding

2015

Ind. Eng. Chem. Res.

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Surface tension and contact angle play important roles in capillary dynamics during washing commission of spray-dried detergent powder where interaction between surface chemistry and liquid is concerned. An experimental study for the dynamics of water/ethanol mixtures in both hydrophilic and hydrophobic capillary tubes has been investigated. The combination of water/ethanol mixtures and Trimethylchlorosilane coating on capillaries provides a variety of liquid surface tension and contact angle for the penetrating system. Significant differences of penetrating speed on hydrophilic and hydrophobic tubes indicate that dynamic contact angle dominates hydrophobic surface while liquid surface tension plays a more important role on hydrophilic surface. The speed gradient of different liquids on hydrophilic surface is greater than hydrophobic surface, mainly due to the domination between hydrogen bonding 2 structures and water polarity while liquid moves on surfaces covered with different chemistry, physically absorbed water on silica capillaries or silanol groups covered capillaries.

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Section: Advancing Contact Anglementioning

confidence: 99%

Capillary Dynamics of Water/Ethanol Mixtures

Amador

Jia

Ding

2015

Ind. Eng. Chem. Res.

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“…(19) can be obtained from existing empirical correlations (e.g. [17,[46][47][48]). In most cases described in the literature, h app is a function of Ca and the equilibrium contact angle h e .…”

Section: A New Numerical Contact Angle Modelmentioning

confidence: 99%

A mesh-dependent model for applying dynamic contact angles to VOF simulations

Afkhami

Zaleski

Bussmann

2009

Journal of Computational Physics

222

178

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a b s t r a c tTypical VOF algorithms rely on an implicit slip that scales with mesh refinement, to allow contact lines to move along no-slip boundaries. As a result, solutions of contact line phenomena vary continuously with mesh spacing; this paper presents examples of that variation. A mesh-dependent dynamic contact angle model is then presented, that is based on fundamental hydrodynamics and serves as a more appropriate boundary condition at a moving contact line. This new boundary condition eliminates the stress singularity at the contact line; the resulting problem is thus well-posed and yields solutions that converge with mesh refinement. Numerical results are presented of a solid plate withdrawing from a fluid pool, and of spontaneous droplet spread at small capillary and Reynolds numbers.Published by Elsevier Inc.

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“…According to the dynamic contact angle models [22][23][24], the capillary number (Ca), equivalent to the group which represents the relative importance of the viscosity and the surface tension effects (Ψ = / ), was considered as an important dimensionless parameter in predicting the pressure drop. They obtained the appropriate values for the coefficient and the exponents in (12) for dry-plug flows with the polyurethane and Teflon tubes based on their current experiments.…”

Section: Literature Reviewmentioning

confidence: 99%

Modeling of Interfacial Component for Two-Phase Frictional Pressure Gradient at Microscales

Awad

Muzychka

2014

Advances in Mechanical Engineering

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A simple approach for calculating the interfacial component of frictional pressure gradient in two-phase flow at microscales is presented. This approach is developed using superposition of three pressure gradients: single-phase liquid, single-phase gas, and interfacial pressure gradient. The proposed model can be transformed in two different ways: first, two-phase interfacial multiplier for liquid flowing alone ( 2 , ) as a function of two-phase frictional multiplier for liquid flowing alone ( 2 ) and the LockhartMartinelli parameter, , and, second, two-phase interfacial multiplier for gas flowing alone ( 2 , ) as a function of two-phase frictional multiplier for gas flowing alone ( 2 ) and the Lockhart-Martinelli parameter, . This proposed model allows for the interfacial pressure gradient to be easily modeled. Comparisons of the proposed model with experimental data for microchannels and minichannels and existing correlations for both and versus are presented.

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The kinetics of wetting: the dynamic contact angle

Cited by 155 publications

References 24 publications

Capillary Dynamics of Water/Ethanol Mixtures

Capillary Dynamics of Water/Ethanol Mixtures

A mesh-dependent model for applying dynamic contact angles to VOF simulations

Modeling of Interfacial Component for Two-Phase Frictional Pressure Gradient at Microscales

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