GIDITURI, Harinadha; WÜRGER, Alois; STRATFORD, Kevin; LINTUVUORI, Juho

doi:10.1063/5.0047530

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GIDITURI, Harinadha
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

WÜRGER, Alois
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

STRATFORD, Kevin

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Physics of Fluids. 2021-05-11

American Institute of Physics

Resumen en inglés

We study the dynamics of a spherical colloidal particle pulled along the fluid-fluid interface using lattice Boltzmann (LB) simulations. We consider an interface with a finite width and include both the effects of the thermodynamics of the interface and the particle wetting, characterized by the contact angle h between the particle surface and the interface, in addition to the viscosity ratio k between the two fluids. We characterize the particle dynamics by applying a constant pulling force along the interface and measure both the translational and the rotational dynamics as a function of the contact angle and the viscosity ratio. We observe that the hydrodynamic drag is reduced and the particle rotation is increased when the particle resides more in the low viscosity fluid, in agreement with previous hydrodynamic theories. We also study the case where the particle rotation is suppressed, and find an overall increase of the drag coefficient.< Leer menos

Palabras clave en inglés

Colloidal particle

contact angle

wetting

Lattice-Boltzmann Method (LBM)

drag force

torque

DOI

http://dx.doi.org/10.1063/5.0047530

Proyecto ANR

Electrodynamical diffuse layers - ANR-19-CE30-0012
Guidage des particules artificielles auto-propulsées - ANR-19-CE06-0012

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Centros de investigación

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798