Concentrated suspensions rheology

Concentrated suspensions rheology


Concentrated suspensions rheology

Rhéologie des Suspensions Concentrées (RSC)

Creeping flows of non-Brownian suspensions are ubiquitous in Industry or in nature. Even when the suspending fluid is Newtonian, these suspensions exhibit a complex rheology especially when the solid fraction is large (shear-thinning, shear-thickening, normal stress differences, shear-induced migration…). We aim to identify and to understand the mechanisms involved at the particle scale that are responsible for these complex behaviours. To this purpose, we use cross-linked numerical and experimental approaches. We develop continuous flow computation based on Finite Volume Method as well as discrete simulations based on Force Coupling Method. Experimental studies are carried out using conventional or non conventional rheometry (suspension imaging, particle stress measurement). At last we are interested in applications (fresh concrete and propergol rheology, sediment transport).