Multiscale simulations of sliding droplets

J. J. Derksen; A. E. Komrakova

doi:10.1007/s00707-018-2264-6

Multiscale simulations of sliding droplets

J. J. Derksen^* (Corresponding Author), A. E. Komrakova

^*Corresponding author for this work

Engineering

University of Alberta

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

4 Citations (Scopus)

8 Downloads (Pure)

Abstract

We study – through numerical simulations – a droplet sliding over a solid substrate as a result of a simple shear flow. We use a free-energy lattice-Boltzmann (LB) scheme and compare its results with those of molecular dynamics (MD) simulations. According to the MD, at sufficiently low Reynolds and capillary numbers, the dimensionless sliding speed is a unique function of the equilibrium contact angle. Reproducing the MD results with LB simulations requires the use of a non-equilibrium boundary condition at the substrate and tuning a free parameter in the boundary condition.

Original language	English
Pages (from-to)	657-666
Number of pages	10
Journal	Acta Mechanica
Volume	230
Issue number	2
Early online date	30 Oct 2018
DOIs	https://doi.org/10.1007/s00707-018-2264-6
Publication status	Published - Feb 2019

Bibliographical note

Open access via Springer Compact Agreement

Keywords

wetting
immiscible liquids
interfacial tension
moving contact lines
molecular dynamics
free-energy lattice-Boltzmann method

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10.1007/s00707-018-2264-6Licence: CC BY

Multiscale simulations of sliding droplets
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Final published version, 1.58 MBLicence: CC BY

Cite this

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abstract = "We study – through numerical simulations – a droplet sliding over a solid substrate as a result of a simple shear flow. We use a free-energy lattice-Boltzmann (LB) scheme and compare its results with those of molecular dynamics (MD) simulations. According to the MD, at sufficiently low Reynolds and capillary numbers, the dimensionless sliding speed is a unique function of the equilibrium contact angle. Reproducing the MD results with LB simulations requires the use of a non-equilibrium boundary condition at the substrate and tuning a free parameter in the boundary condition. ",

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N2 - We study – through numerical simulations – a droplet sliding over a solid substrate as a result of a simple shear flow. We use a free-energy lattice-Boltzmann (LB) scheme and compare its results with those of molecular dynamics (MD) simulations. According to the MD, at sufficiently low Reynolds and capillary numbers, the dimensionless sliding speed is a unique function of the equilibrium contact angle. Reproducing the MD results with LB simulations requires the use of a non-equilibrium boundary condition at the substrate and tuning a free parameter in the boundary condition.

AB - We study – through numerical simulations – a droplet sliding over a solid substrate as a result of a simple shear flow. We use a free-energy lattice-Boltzmann (LB) scheme and compare its results with those of molecular dynamics (MD) simulations. According to the MD, at sufficiently low Reynolds and capillary numbers, the dimensionless sliding speed is a unique function of the equilibrium contact angle. Reproducing the MD results with LB simulations requires the use of a non-equilibrium boundary condition at the substrate and tuning a free parameter in the boundary condition.

KW - wetting

KW - immiscible liquids

KW - interfacial tension

KW - moving contact lines

KW - molecular dynamics

KW - free-energy lattice-Boltzmann method

UR - http://www.mendeley.com/research/multiscale-simulations-sliding-droplets

U2 - 10.1007/s00707-018-2264-6

DO - 10.1007/s00707-018-2264-6

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SN - 0001-5970

VL - 230

SP - 657

EP - 666

JO - Acta Mechanica

JF - Acta Mechanica

IS - 2

ER -

Multiscale simulations of sliding droplets

Abstract

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Keywords

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