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Pré-Publication, Document De Travail Année : 2017

A new rate-independent tensorial model for suspensions of non-colloidal rigid particles in Newtonian fluids

Résumé

We propose a new tensorial model to describe the rheology of non-colloidal suspensions. Qualitatively, this model proves capable of reproducing all the main non-Newtonian trends exhibited by concentrated suspensions: anisotropic and fore-aft asymmetric microstructure in simple shear and transient relaxation of the microstructure towards its stationary state. The model includes only few constitutive parameters, with clear physical meaning, that can be identified for comparisons with experimental data. Hence, quantitative predictions of the complex transient evolution of apparent viscosity observed after shear reversals are reproduced for a large range of volume fractions. Comparisons with micro-structural data shows that not only the depletion angle, but the pair distribution function, are well predicted. To our knowledge, it is the first time that a microstructure-based rheological model is successfully compared to such a wide experimental dataset.
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Dates et versions

hal-01528817 , version 1 (29-05-2017)
hal-01528817 , version 2 (13-07-2017)
hal-01528817 , version 3 (02-11-2017)
hal-01528817 , version 4 (19-12-2017)
hal-01528817 , version 5 (20-03-2018)
hal-01528817 , version 6 (24-04-2018)

Identifiants

  • HAL Id : hal-01528817 , version 3

Citer

Olivier Ozenda, Pierre Saramito, Guillaume Chambon. A new rate-independent tensorial model for suspensions of non-colloidal rigid particles in Newtonian fluids . 2017. ⟨hal-01528817v3⟩
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