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@ARTICLE{Dasanna:892734,
author = {Dasanna, Anil K. and Mauer, Johannes and Gompper, Gerhard
and Fedosov, Dmitry A.},
title = {{I}mportance of {V}iscosity {C}ontrast for the {M}otion of
{E}rythrocytes in {M}icrocapillaries},
journal = {Frontiers in physics},
volume = {9},
issn = {2296-424X},
address = {Lausanne},
publisher = {Frontiers Media},
reportid = {FZJ-2021-02295},
pages = {666913},
year = {2021},
abstract = {The dynamics and deformation of red blood cells (RBCs) in
microcirculation affect the flow resistance and transport
properties of whole blood. One of the key properties that
can alter RBC dynamics in flow is the contrast λ (or ratio)
of viscosities between RBC cytosol and blood plasma. Here,
we study the dependence of RBC shape and dynamics on the
viscosity contrast in tube flow, using mesoscopic
hydrodynamics simulations. State diagrams of different RBC
dynamical states, including tumbling cells, parachutes, and
tank-treading slippers, are constructed for various
viscosity contrasts and wide ranges of flow rates and tube
diameters (or RBC confinements). Despite similarities in the
classification of RBC behavior for different viscosity
contrasts, there are notable differences in the
corresponding state diagrams. In particular, the region of
parachutes is significantly larger for λ = 1 in comparison
to λ = 5. Furthermore, the viscosity contrast strongly
affects the tumbling-to-slipper transition, thus modifying
the regions of occurrence of these states as a function of
flow rate and RBC confinement. Also, an increase in cytosol
viscosity leads to a reduction in membrane tension induced
by flow stresses. Physical mechanisms that determine these
differences in RBC dynamical states as a function of λ are
discussed.},
cin = {IBI-5},
ddc = {530},
cid = {I:(DE-Juel1)IBI-5-20200312},
pnm = {524 - Molecular and Cellular Information Processing
(POF4-524)},
pid = {G:(DE-HGF)POF4-524},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000653645500001},
doi = {10.3389/fphy.2021.666913},
url = {https://juser.fz-juelich.de/record/892734},
}