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On the multi-scale description of micro-structured fluids composed of aggregating rods

Article dans une revue avec comité de lecture
Author
PEREZ, Marta
564849 ESI Group [ESI Group]
SCHEUER, Adrien
92863 Université Catholique de Louvain = Catholic University of Louvain [UCL]
564849 ESI Group [ESI Group]
ABISSET-CHAVANNE, Emmanuelle
564849 ESI Group [ESI Group]
AMMAR, Amine
211916 Laboratoire Angevin de Mécanique, Procédés et InnovAtion [LAMPA]
CHINESTA, Francisco
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
KEUNINGS, Roland
92863 Université Catholique de Louvain = Catholic University of Louvain [UCL]

URI
http://hdl.handle.net/10985/17967
DOI
10.1007/s00161-018-0659-1
Date
2019
Journal
Continuum Mechanics and Thermodynamics

Abstract

When addressing the flow of concentrated suspensions composed of rods, dense clusters are observed. Thus, the adequate modelling and simulation of such a flow requires addressing the kinematics of these dense clusters and their impact on the flow in which they are immersed. In a former work, we addressed a first modelling framework of these clusters, assumed so dense that they were considered rigid and their kinematics (flow-induced rotation) were totally defined by a symmetric tensor c with unit trace representing the cluster conformation. Then, the rigid nature of the clusters was relaxed, assuming them deformable, and a model giving the evolution of both the cluster shape and its microstructural orientation descriptor (the so-called shape and orientation tensors) was proposed. This paper compares the predictions coming from those models with finer-scale discrete simulations inspired from molecular dynamics modelling.

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