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Abdoulaye Fall
Researcher at École des ponts ParisTech
Publications - 43
Citations - 1763
Abdoulaye Fall is an academic researcher from École des ponts ParisTech. The author has contributed to research in topics: Rheology & Shear rate. The author has an hindex of 16, co-authored 38 publications receiving 1529 citations. Previous affiliations of Abdoulaye Fall include University of Amsterdam & University of Paris.
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An attempt to categorize yield stress fluid behaviour
TL;DR: It is shown that true yield stress materials indeed exist, and in addition, it is accounted for shear banding that is generically observed in yield stress fluids.
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Shear thickening of cornstarch suspensions as a reentrant jamming transition.
TL;DR: Shear thickening can be interpreted as the consequence of dilatancy: the system under flow wants to dilate but instead undergoes a jamming transition because it is confined, as confirmed by measurement of the dilation of the suspension as a function of the shear rate.
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Origin of apparent viscosity in yield stress fluids below yielding
TL;DR: In this paper, it was shown that the low-stress Newtonian viscosity is an artifact that arises in non-steady state experiments, and that the value of the "Newtonian viscoity" increases indefinitely.
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Shear Thickening and Migration in Granular Suspensions
Abdoulaye Fall,Abdoulaye Fall,Anaël Lemaître,François Bertrand,Daniel Bonn,Daniel Bonn,Guillaume Ovarlez +6 more
TL;DR: In this article, the emergence of shear thickening in dense suspensions of non-Brownian particles was studied using magnetic resonance imaging with macroscopic rheometry experiments, and it was observed that the material is heterogeneous, and that the local rheology presents a continuous transition at low shear rate from a viscous to a shear-thickening, Bagnoldian, behavior with shear stresses proportional to the shear rates squared.
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Shear thickening of cornstarch suspensions
TL;DR: In this paper, the authors studied the rheology of cornstarch suspensions, a non-Brownian particle system that exhibits discontinuous shear thickening, and found that the shear region of a nonflowing region seems to prevent or delay shear thinning.