We present an experimental study of the rheology and structure of a confined suspension of deformable particles flowing in a quasi-two-dimensional Poiseuille flow. Thanks to a precise microfluidic viscosimetry technique combined with measurements of concentration profiles, our study provides the first experimental confirmation with three-dimensional particles of a strong relationship between structuring effects and rheology, previously only reported in numerical simulations of purely two-dimensional systems. In conditions where strong structuring effects take place due to confinement, the evolution of the effective viscosity with particle concentration (here, red blood cells) shows a remarkable succession of ranges of rapid growth and plateaus that are associated with qualitative transitions in the structure of the suspension.
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April 2022
Research Article|
April 13 2022
Rheology and structure of a suspension of deformable particles in plane Poiseuille flow
Vassanti Audemar;
Vassanti Audemar
1
Université Grenoble Alpes, CNRS, LIPhy
, F-38000 Grenoble, France
2
Université Paris Saclay, I2BC
, Paris, France
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Thomas Podgorski
;
Thomas Podgorski
1
Université Grenoble Alpes, CNRS, LIPhy
, F-38000 Grenoble, France
3
Université Grenoble Alpes, CNRS, Grenoble INP, LRP
, F-38000 Grenoble, France
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Gwennou Coupier
Gwennou Coupier
a)
1
Université Grenoble Alpes, CNRS, LIPhy
, F-38000 Grenoble, France
a)Author to whom correspondence should be addressed: gwennou.coupier@univ-grenoble-alpes.fr
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a)Author to whom correspondence should be addressed: gwennou.coupier@univ-grenoble-alpes.fr
Physics of Fluids 34, 042013 (2022)
Article history
Received:
February 04 2022
Accepted:
March 28 2022
Citation
Vassanti Audemar, Thomas Podgorski, Gwennou Coupier; Rheology and structure of a suspension of deformable particles in plane Poiseuille flow. Physics of Fluids 1 April 2022; 34 (4): 042013. https://doi.org/10.1063/5.0087378
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