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Lattice Boltzmann simulations on the tumbling to tank-treading transition: effects of membrane viscosity

Citation

Guglietta, Fabio et al. (2021), Lattice Boltzmann simulations on the tumbling to tank-treading transition: effects of membrane viscosity, Dryad, Dataset, https://doi.org/10.5061/dryad.zpc866t7h

Abstract

The tumbling to tank-treading (TB-TT) transition for red blood cells (RBCs) has been widely investigated, with a main focus on the effects of the viscosity ratio λ (i.e., the ratio between the viscosities of the fluids inside and outside the membrane) and the shear rate γ ̇ applied to the RBC. However, the membrane viscosity μm plays a major role in a realistic description of RBC’s dynamics, and only a few works have systematically focused on its effects on the TB-TT transition. In this work, we provide a parametric investigation on the effect of membrane viscosity μm on the TB- TT transition, for a single RBC. It is found that, at fixed viscosity ratios λ, larger values of μm lead to an increased range of values of capillary number at which the TB-TT transition occurs. We systematically quantify such an increase by means of mesoscale numerical simulations based on the lattice Boltzmann models.

Funding

Università degli Studi di Roma Tor Vergata, Award: E84I19002470005

H2020 Marie Skłodowska-Curie Actions, Award: 765048