Scaling relationships between viscosity and diffusivity in shear-thickening suspensions

Singh, Abhinendra; Saitoh, Kuniyasu

doi:10.1039/d3sm00510k

Soft Matter

2023

DOI: 10.1039/d3sm00510k

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Scaling relationships between viscosity and diffusivity in shear-thickening suspensions

Abhinendra Singh¹,

Kuniyasu Saitoh²

Abstract: Dense suspensions often exhibit a dramatic response to large external deformation. The recent body of work has related this behavior to transition from an unconstrained lubricated to a constrained frictional...

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2024

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Cited by 2 publications

References 97 publications

(195 reference statements)

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Role of plasticity in the universal scaling of shear-thickening dense suspensions

Barik,

Mohanan,

Majumdar

2024

Rheol Acta

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Role of plasticity in the universal scaling of shear-thickening dense suspensions

Barik,

Mohanan,

Majumdar

2024

Rheol Acta

View full text Add to dashboard Cite

Frictional effects on shear-induced diffusion in suspensions of non-Brownian particles

Zhang,

Kopelevich,

Butler

2024

J. Fluid Mech.

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The shear-induced diffusivity of non-Brownian spheres in monodisperse suspensions undergoing viscous flow was calculated using simulations that account for particle roughness and friction as independent parameters. The diffusivity increases significantly as the friction coefficient is increased, and the effect is largest on rougher particles. Roughness reduces the transverse diffusivities relative to smoother particles for sufficiently concentrated suspensions of frictionless and low-friction particles. However, the diffusivity of roughened particles is larger than smoother ones at high values of the friction coefficient. The increase of the diffusivity with friction is associated with a significant broadening of the variance of the rotational velocities. The most prevalent observation, when correlating the microstructure to changes in diffusivity for frictionless particles, is that less diffusive systems, with larger roughness, form layers along the flow direction. These results confirm previous experimental and simulation results that roughness can decrease diffusivity at large concentrations using a more detailed model. Also, comparisons of the simulation results with previously published experimental measurements indicate that friction improves the alignment of the results with experiments.

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Scaling relationships between viscosity and diffusivity in shear-thickening suspensions

Abstract: Dense suspensions often exhibit a dramatic response to large external deformation. The recent body of work has related this behavior to transition from an unconstrained lubricated to a constrained frictional...

Cited by 2 publications

References 97 publications

Role of plasticity in the universal scaling of shear-thickening dense suspensions

Role of plasticity in the universal scaling of shear-thickening dense suspensions

Frictional effects on shear-induced diffusion in suspensions of non-Brownian particles

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