Rheophysical classification of concentrated suspensions and granular pastes

Coussot, Philippe; Ancey, Christophe

doi:10.1103/physreve.59.4445

Cited by 218 publications

(173 citation statements)

References 93 publications

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“…It may be reasonable to consider that when the solid concentration increases across φ m , the suspension experiences a transition of rheological regime: the suspension rheology changes from being primarily determined by the liquid phase to exhibiting remarkably non-Newtonian behaviour with a yield stress [19,20,28,29,35]. In the latter regime, the rheology is much more complex than the former regime.…”

Section: Introductionmentioning

confidence: 99%

“…Experiments have been performed to study this relationship, and some models have been used to describe it [21][22][23][24][25][26]. However, a simple relationship may not exist because the particle in a suspending medium can Water 2017, 9, 474 2 of 14 be subject to hydrodynamic, Brownian, colloidal force and other effects, which are not easily modelled in a simple form [16,[27][28][29].…”

Section: Introductionmentioning

confidence: 99%

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Dependence of Sediment Suspension Viscosity on Solid Concentration: A Simple General Equation

Zhu

Wang

Peng

2017

Water

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Abstract:In this study, a simple and new parametric equation is proposed that describes the relative viscosity of a suspension as a function of suspended solid concentration, covering a range from very dilute to highly concentrated states, based on Costa (2005). The proposed viscosity law depends mainly on the solid volumetric concentration φ and maximum packing fraction φ m at which a regime transition occurs. Furthermore, the viscosity of dilute as well as a highly-concentrated kaolinite suspension (in excess of 40% and lower than 50%) was measured in a coaxial cylinder rheometer. The proposed formula shows a capability of fitting the measured bulk viscosity into the hyper-concentrated regime in the experiment. Finally, the proposed equation could also be found to show a good fitting relationship with published experimental results on partially crystallised Li 2 Si 2 O 5 melt and partially melted granite with solid contents from 75% to 95%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dependence of Sediment Suspension Viscosity on Solid Concentration: A Simple General Equation

Zhu

Wang

Peng

2017

Water

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“…Such dense suspensions do exhibit an intricate physics which is hitherto far from being understood completely. This complexity partly arises from the wide variety of interactions between particles : Brownian, colloidal, hydrodynamic, frictional or collisional (see Coussot & Ancey (1999) for a review on those different regimes) as well as from the physical properties of particles (roughness, shape, size distribution,...). Even the case of non-Brownian non-colloidal single-sized spherical particles embedded in a Newtonian fluid -which will be the system investigated in this study -is likely to show complex non-Newtonian behaviours (Stickel & Powell 2005;Morris 2009).…”

Section: Introductionmentioning

confidence: 99%

Rheology of sheared suspensions of rough frictional particles

et al. 2014

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This paper presents three-dimensional numerical simulations of non-Brownian concentrated suspensions in a Couette flow at zero Reynolds number using a fictitious domain method. Contacts between particles are modelled using a discrete element method (DEM)-like approach, which allows for a more physical description, including roughness and friction. This work emphasizes the effect of friction between particles and its role on rheological properties, especially on normal stress differences. Friction is shown to notably increase viscosity and second normal stress difference $\def \xmlpi #1{}\def \mathsfbi #1{\boldsymbol {\mathsf {#1}}}\let \le =\leqslant \let \leq =\leqslant \let \ge =\geqslant \let \geq =\geqslant \def \Pr {\mathit {Pr}}\def \Fr {\mathit {Fr}}\def \Rey {\mathit {Re}}|N_2|$ and decrease $|N_1|$, in better agreement with experiments. The hydrodynamic and contact contributions to the overall particle stress are particularly investigated. This shows that the effect of friction is mostly due to the additional contact stress since the hydrodynamic stress remains unaffected by friction. Simulation results are also compared with experiments, such as normal stresses or effective friction coefficient $\mu (I_v)$, and the agreement is improved when friction is accounted for. This suggests that friction is operative in actual suspensions.

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“…Like any thin fluid film between moving particles, the bridge generates a viscous force, which is repulsive when the particles approach or attractive when they separate, and whose magnitude increases with both liquid viscosity and interparticle velocity [124]. Moreover, the capillary force exerted by the bridge may increase the interparticle friction or decrease it, if the liquid viscosity or the deformation rate is high enough to prevent solid-solid contact [153,156,158]. Hence, there exists a complex interrelation between forces, which can be treated by means of the capillary number Ca = D/cos ( is the liquid viscosity and  is the rate) as the ratio of viscous to capillary forces [33].…”

Section: P-h Curvesmentioning

confidence: 99%

“…As expressed above, although dense particulate media are in general viscoplastic, dry materials show a rather frictional-dominated behavior while dense suspensions exhibit viscous-dominated response because of the viscosity of the interstitial liquid and the lubricated contacts between grains [158,159]. Interestingly, rheology of both systems can be described with a common framework by properly substituting the inertial time scale by a viscous time scale including the viscosity of the fluid phase [160].…”

Section: P-h Curvesmentioning

confidence: 99%

Colloidal crystals and water: Perspectives on liquid–solid nanoscale phenomena in wet particulate media

Gallego-Gómez

Morales‐Flórez

Morales

et al. 2016

Advances in Colloid and Interface Science

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Solid colloidal ensembles inherently contain water adsorbed from the ambient moisture. This water, confined in the porous network formed by the building submicron spheres, greatly affects the ensemble properties. Inversely, one can benefit from such influence on collective features to explore the water behavior in such nanoconfinements. Recently, novel approaches have been developed to investigate in-depth where and how water is placed in the nanometric pores of self-assembled colloidal crystals. Here we summarize these advances, along with new ones, that are linked to general interfacial water phenomena like adsorption, capillary forces and flow. Waterdependent structural properties of the colloidal crystal give clues to the interplay between nanoconfined water and solid fine particles that determines the behavior of ensembles. We elaborate on how the knowledge gained on water in colloidal crystals provides new opportunities for multidisciplinary study of interfacial and nanoconfined liquids and their essential role in the physics of utmost important systems such as particulate media.

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Rheophysical classification of concentrated suspensions and granular pastes

Cited by 218 publications

References 93 publications

Dependence of Sediment Suspension Viscosity on Solid Concentration: A Simple General Equation

Dependence of Sediment Suspension Viscosity on Solid Concentration: A Simple General Equation

Rheology of sheared suspensions of rough frictional particles

Colloidal crystals and water: Perspectives on liquid–solid nanoscale phenomena in wet particulate media

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