Physics of Fluids - Publications

Two-dimensional lattice Boltzmann simulations of vesicles with viscosity contrast

RHEOLOGICA ACTA 55, 465–475 (2015)

Authors

	Badr Kaoui
	Jens Harting

BibTeΧ

@Article{Kaoui2016,
author="Kaoui, Badr
and Harting, Jens",
title="Two-dimensional lattice Boltzmann simulations of vesicles with viscosity contrast",
journal="Rheologica Acta",
year="2016",
volume="55",
number="6",
pages="465--475",
abstract="We present a numerical approach to simulate the dynamics of viscous vesicles (their internal and external fluids have different viscosities). The flow is computed using the lattice Boltzmann method and the fluid-vesicle two-way coupling is achieved using the immersed boundary method. The viscosity contrast (defined as the ratio of the internal to the external viscosities) is included using a geometrical algorithm that detects if a fluid node is either located inside or outside a vesicle. Our two-dimensional simulations successfully reproduce the tank-treading and tumbling dynamical states known for a viscous vesicle when it is subjected to simple shear flow. A good qualitative agreement between our simulation results and literature data is obtained. Moreover, we quantitatively analyze how inertia influences the dynamics of a vesicle and as an outlook we present an application of our method to the flow of multiple viscous vesicles in a microfluidic constriction.",
issn="1435-1528",
doi="10.1007/s00397-015-0867-6",
url="http://dx.doi.org/10.1007/s00397-015-0867-6"
}