Weakly adhesive suspension shows rate-dependence in oscillatory but not steady shear flows

Ge, Zhouyang; Martone, Raffaella; Brandt, Luca; Minale, Mario

doi:10.48550/arxiv.2006.04494

Cited by 2 publications

(3 citation statements)

References 30 publications

(43 reference statements)

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“…Although plausible, it is difficult to rigorously establish this argument in all scenarios. In fact, our simulations show that electrostatic repulsion causes shear thickening in OS, again contradicting the experimental results [31].…”

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confidence: 86%

Irreversibility and rate dependence in sheared adhesive suspensions

Ge¹,

Martone²,

Brandt³

et al. 2021

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Recent experiments report that slowly-sheared noncolloidal particle suspensions can exhibit unexpected rate(ω)-dependent complex viscosities in oscillatory shear, despite a constant relative viscosity in steady shear. Using a minimal hydrodynamic model, we show that a weak interparticle attraction reproduces this behavior. At volume fractions φ = 20 ∼ 50%, the complex viscosities in both experiments and simulations display power-law reductions in shear, with a φ-dependent exponent maximum at φ = 40%, resulting from the interplay between hydrodynamic, collision and adhesive interactions. Furthermore, this rate dependence is accompanied by diverging particle diffusivities and pronounced cluster formations even at small oscillation amplitudes γ0. Previous studies established that suspensions transition from reversible absorbing states to irreversible diffusing states when γ0 exceeds a φ-dependent critical value γ c 0,φ . Here, we show that a second transition to irreversibility occurs below an ω-dependent critical amplitude, γ c 0,ω ≤ γ c 0,φ , in the presence of weak attractions.

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confidence: 86%

Irreversibility and rate dependence in sheared adhesive suspensions

Ge¹,

Martone²,

Brandt³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…First, the models of the contributions adopted to simulate the particle-particle and the particle-flow interactions have been presented. The models mimic the ones already available in the literature, echoing in particular the implementation of Mari et al 23 and Ge et al 26,27 .…”

Section: Discussionmentioning

confidence: 84%

“…Following the work by Ge et al 26,27 , the governing equations (1) are advanced in time with the modified velocity-Verlet scheme 28 ,…”

Section: A Numerical Algorithmmentioning

confidence: 99%

A fast and efficient tool to study the rheology of dense suspensions

Monti,

Rathee,

Shen

et al. 2021

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Weakly adhesive suspension shows rate-dependence in oscillatory but not steady shear flows

Cited by 2 publications

References 30 publications

Irreversibility and rate dependence in sheared adhesive suspensions

Irreversibility and rate dependence in sheared adhesive suspensions

A fast and efficient tool to study the rheology of dense suspensions

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