Rheology of dense suspensions of non-colloidal spheres in yield-stress fluids

Dagois-Bohy, Simon; Hormozi, Sarah; Guazzelli, Élisabeth; Pouliquen, Olivier

doi:10.1017/jfm.2015.329

Cited by 75 publications

(70 citation statements)

References 15 publications

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“…as was done by Dagois-Bohy et al (2015). The red curve in figure 6(c) shows the result, with µ s = 0.47, α = 2.44 and β = 10.20.…”

Section: Constitutive Lawsmentioning

confidence: 87%

“…Using a custom rheometer (Boyer et al 2011;Dagois-Bohy et al 2015), we have performed pressure-and volume-imposed measurements of the rheology of non-colloidal rigid fibres suspended in a Newtonian fluid. Measurements for the shear stress and particle pressure have been obtained in the dense regime and for aspect ratios between 3 and 15, and the volume fraction at which the rheology diverges has been characterised as a function of the aspect ratio.…”

Section: Discussionmentioning

confidence: 99%

“…The rheometer (Boyer, Guazzelli & Pouliquen 2011;Dagois-Bohy et al 2015) measures the stresses in both a pressure-imposed configuration and a volume-imposed one. The measurements indicate the presence of yield stresses in the tested suspensions, but also a viscous scaling wherein the stress grows linearly with the rate of shear.…”

Section: F Tapia S Shaikh J E Butler O Pouliquen and é Guazzmentioning

confidence: 99%

“…The experiments were conducted using a custom rheometer that was originally constructed by Boyer et al (2011) and then modified by Dagois-Bohy et al (2015). This rheometer, sketched in figure 1(a), provides measurements of both shear and normal stresses.…”

Section: Experimental Techniquesmentioning

confidence: 99%

“…The bottom annulus was rotated at a rate Ω by an asynchronous motor (Parvalux SD18) regulated by a frequency controller (Omron MX2 0.4 kW), while the torque exerted on the top plate was measured by a torque transducer (TEI-CFF401). The shear stress τ was deduced from these torque measurements after calibration with a pure fluid to subtract undesired contributions resulting from the friction at the central axis and the shear in the thin gap between the top plate and the cell walls; the calibration method is described by Dagois-Bohy et al (2015). A precision scale (Mettler-Toledo XS6002S) was placed on a vertical translation stage driven by a LabVIEW code in order to measure the apparent weight of the top plate.…”

Section: Experimental Techniquesmentioning

confidence: 99%

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Rheology of concentrated suspensions of non-colloidal rigid fibres

et al. 2017

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Pressure-and volume-imposed rheology is used to study suspensions of non-colloidal, rigid fibres in the concentrated regime for aspect ratios ranging from 3 to 15. The suspensions exhibit yield stresses. Subtracting these apparent yield stresses reveals a viscous scaling for both the shear and normal stresses. The variation in aspect ratio does not affect the friction coefficient (ratio of shear and normal stresses), but increasing the aspect ratio lowers the maximum volume fraction at which the suspension flows. Constitutive laws are proposed for the viscosities and the friction coefficient close to the jamming transition.

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“…as was done by Dagois-Bohy et al (2015). The red curve in figure 6(c) shows the result, with µ s = 0.47, α = 2.44 and β = 10.20.…”

Section: Constitutive Lawsmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: F Tapia S Shaikh J E Butler O Pouliquen and é Guazzmentioning

confidence: 99%

Section: Experimental Techniquesmentioning

confidence: 99%

Section: Experimental Techniquesmentioning

confidence: 99%

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Rheology of concentrated suspensions of non-colloidal rigid fibres

et al. 2017

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Shear‐induced migration and axial development of particles in channel flows of non‐Brownian suspensions

et al. 2020

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We present an experimental study on the shear-induced migration and axial development of particles in the channel flows of non-Brownian suspensions. The suspending fluid is Newtonian. We investigate fracturing flows with a Hele-Shaw type scaling through building a unique channel setup and an advanced optical system. The local particle concentration profiles are measured via the refractive-index matching technique for a wide range of bulk volume fraction, that is, 0:1 ≤ ϕ b ≤ 0:5. Simultaneously, the particle image velocimetry is performed to determine the velocity profile of the particle phase. We compare our experimental results with the available two-phase continuum frameworks and show discrepancies and similarities in the fully developed and axial development of the solid volume fraction profiles. We discuss directions in which the continuum frameworks require improvements.

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Computational modeling of multiphase viscoelastic and elastoviscoplastic flows

Izbassarov

Rosti

Ardekani

et al. 2018

Numerical Methods in Fluids

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Summary In this paper, a three‐dimensional numerical solver is developed for suspensions of rigid and soft particles and droplets in viscoelastic and elastoviscoplastic (EVP) fluids. The presented algorithm is designed to allow for the first time three‐dimensional simulations of inertial and turbulent EVP fluids with a large number particles and droplets. This is achieved by combining fast and highly scalable methods such as an FFT‐based pressure solver, with the evolution equation for non‐Newtonian (including EVP) stresses. In this flexible computational framework, the fluid can be modeled by either Oldroyd‐B, neo‐Hookean, FENE‐P, or Saramito EVP models, and the additional equations for the non‐Newtonian stresses are fully coupled with the flow. The rigid particles are discretized on a moving Lagrangian grid, whereas the flow equations are solved on a fixed Eulerian grid. The solid particles are represented by an immersed boundary method with a computationally efficient direct forcing method, allowing simulations of a large numbers of particles. The immersed boundary force is computed at the particle surface and then included in the momentum equations as a body force. The droplets and soft particles on the other hand are simulated in a fully Eulerian framework, the former with a level‐set method to capture the moving interface and the latter with an indicator function. The solver is first validated for various benchmark single‐phase and two‐phase EVP flow problems through comparison with data from the literature. Finally, we present new results on the dynamics of a buoyancy‐driven drop in an EVP fluid.

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Rheology of dense suspensions of non-colloidal spheres in yield-stress fluids

Cited by 75 publications

References 15 publications

Rheology of concentrated suspensions of non-colloidal rigid fibres

Rheology of concentrated suspensions of non-colloidal rigid fibres

Shear‐induced migration and axial development of particles in channel flows of non‐Brownian suspensions

Computational modeling of multiphase viscoelastic and elastoviscoplastic flows

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