Radial flow velocity profiles of a yield stress fluid between smooth parallel disks

Shamu, Tafadzwa John; Zou, Liangchao; Kotze, Reinhardt; Wiklund, Johan; Håkansson, Ulf

doi:10.1007/s00397-020-01203-x

Cited by 11 publications

(3 citation statements)

References 62 publications

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“…loading of a Couette rheometer Leighton & Acrivos 1987), radial source flow (Shamu et al. 2020) or in devices involving the flow of a suspension through a confined geometry such as powder injection molding (Lam et al. 2003).…”

Section: Discussionmentioning

confidence: 99%

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A macrotransport equation for the Hele-Shaw flow of a concentrated suspension

Chakraborty

Ramachandran

2021

J. Fluid Mech.

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Section: Discussionmentioning

confidence: 99%

“…2019) or in the testing of the spreading properties of cement grout in rock fractures (Shamu et al. 2020). In the Hele-Shaw geometry, the shear stresses vanish at the centreplane between the two Hele-Shaw plates to leading order, and this can lead to complexities in the numerical solution of the suspension balance model.…”

Section: Introductionmentioning

confidence: 99%

A macrotransport equation for the Hele-Shaw flow of a concentrated suspension

Chakraborty

Ramachandran

2021

J. Fluid Mech.

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“…Lavrov [27] provided a comprehensive overview of non-Newtonian flow in fractures. Shamu [28] presented an analysis of the radial velocity profile between parallel plates in the flow of non-Newtonian fluids within fractures, along with numerical solutions. Consequently, there has been extensive research by numerous scholars on non-Newtonian fluids in this field.…”

Section: Introductorymentioning

confidence: 99%

Infiltration Grouting Mechanism of Bingham Fluids in Porous Media with Different Particle Size Distributions

Xu,

Zhang,

Yin

et al. 2023

Applied Sciences

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Although permeation grouting technology has been widely used in engineering practice, there has not been sufficient research on how the distribution of pore sizes in porous media affects the diffusion of grout. In this study, based on the fractal theory of porous media and the Bingham fluid rheological equation, a Bingham fluid permeation grouting mechanism considering the distribution of pore sizes in porous media is proposed. The mechanism is validated through laboratory experiments and numerical simulations using COMSOL 6.0. During the experiments, parallel electrical resistance imaging is employed to monitor the diffusion range of the grout. Furthermore, the effects of grouting pressure, porosity, and water–cement ratio on the diffusion radius of the grout are analyzed. The results show that the Bingham fluid grout diffuses in a semi-spherical shape in the gravel. Additionally, parallel electrical resistance imaging can analyze the diffusion range of the grout in the gravel. The diffusion radius of the Bingham fluid grout in the gravel is smaller than the diffusion radius obtained by considering the particle size distribution theory, with an average difference of 31.8%. Compared to the diffusion radius obtained without considering the particle size distribution theory, the diffusion radius obtained by considering the distribution of pore sizes is closer to the experimental results. The numerically simulated program, which was developed for this study, can effectively simulate the diffusion law of the Bingham fluid in the gravel. So far, the Bingham fluid seepage grouting model considering the different particle size distribution of porous media has been built. The findings of this study can provide theoretical support and technical reference for practical grouting projects.

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An alternative approach for measuring yield stress and its application in Carbopol microgel

et al. 2021

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An innovative experimental apparatus for the direct measurement of yield stress was conceived and realized. It is based on a torsion pendulum equipped with a magnetic dipole and a rotating cylinder immersed in the material to be investigated. The pendulum equilibrium state depends on the mechanical torque applied due to an external magnetic induction field, elastic reaction of the suspension wire, and shear yield stress. Experimental results are reported showing that the behavior of the pendulum rotation angle, in different equilibrium conditions, provides evidence of the yield stress presence and enables its evaluation by equilibrium equations. The dependence on time of the equilibrium approach was also studied, contributing to shed light on the relaxation effect in the transition from a fluid-like to solid-like behavior, as well as on the eventual thixotropic effects in non-Newtonian fluids. The validity of the proposed technique and related experimental apparatus was tested in aqueous Carbopol solutions, with different weight percentages. The linear procedure, combined with the effectiveness and reliability of the proposed experimental method, candidates it to be used for the study of peculiar behaviors of other yield stress complex fluid such as blood, crude waxy oils, ice slurries, and coating layer used in the food industry and also for fault sliding in geodynamics.

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Radial flow velocity profiles of a yield stress fluid between smooth parallel disks

Cited by 11 publications

References 62 publications

A macrotransport equation for the Hele-Shaw flow of a concentrated suspension

A macrotransport equation for the Hele-Shaw flow of a concentrated suspension

Infiltration Grouting Mechanism of Bingham Fluids in Porous Media with Different Particle Size Distributions

An alternative approach for measuring yield stress and its application in Carbopol microgel

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