Continuous Shear Thickening and Colloid Surfaces

Melrose, J. R.; Vliet, J.H. van; Ball, Robin C.

doi:10.1103/physrevlett.77.4660

Cited by 87 publications

(42 citation statements)

References 18 publications

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“…Their study revealed that the alignment of particles is highly complex at the high shear rate because of the increased viscosity between the particles. Melrose et al, 1996 supported the Maranzano's theory Maranzano and Wagner, 2002 by collapsing the interparticle gap under high shear rates. This phenomenon was also observed in the experiments by Chow Chow and Zukoski, 1995. Thus, hydroclusters (random collection of particles) are easily formed under high shear rate and these clusters impede the flow causing stress level to rise.…”

Section: Discussionmentioning

confidence: 90%

“…These materials are solidified by cross-linking process which induces covalent bonds in chemical gels and hydrogen or ionic bonds in physical gels Baumberger et al, 2006. We find two major mechanisms for thickening behavior at high rates: (i) internal energy dissipation Baumberger et al, 2006;Seitz et al, 2009;Tanaka et al, 2000;Furukawa et al, 2008 and (ii) hydrocluster formation Carvalho and Djabourov, 1997;Frith et al, 1996;Bossis and Brady, 1989;Lee et al, 2002;Bender and Wagner, 1995;Maranzano and Wagner, 2002;Melrose et al, 1996;Chow and Zukoski, 1995;Catherall et al, 2000. The first argument is based on bond-structure of gelatin while the second is based on the microstructure of gelatin.…”

Section: Discussionmentioning

confidence: 95%

“…The thickening behavior of the colloidal suspension arises from a reorganization of the polymer chains and their interaction as a function of shear rate Frith et al, 1996. Numerous researchers Frith et al, 1996Bossis and Brady, 1989;Lee et al, 2002;Bender and Wagner, 1995;Maranzano and Wagner, 2002;Melrose et al, 1996;Chow and Zukoski, 1995;Catherall et al, 2000 have investigated the shearthickening behavior of colloidal suspension. Lee et al, 2002 argued that the shear-thickening behavior can be explained by hydrocluster formation, an argument supported by other researchers Bossis and Brady, 1989;Bender and Wagner, 1995. Under high shear-rate deformation, permeated rearrangement of particles across macroscopic dimensions can cause an increase in the size of hydroclusters and the frequency of collisions between the particles.…”

Section: Discussionmentioning

confidence: 98%

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Compressive strain rate sensitivity of ballistic gelatin

Kwon¹,

Subhash²

2010

Journal of Biomechanics

103

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 98%

See 1 more Smart Citation

Compressive strain rate sensitivity of ballistic gelatin

Kwon¹,

Subhash²

2010

Journal of Biomechanics

103

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“…Phenomenological shear thickening models have shown stress distributions that are similar to those of force chains in jammed systems [6,10]. However, the mild shear thickening behavior found in simulations [10,26,27,28] so far cannot reproduce the dramatic increases in viscosity with shear rate observed in many experiments. As a result, the connection between shear thickening and the onset of jamming has been qualitative and many details of the relationship remain unresolved.…”

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confidence: 98%

Dynamic Jamming Point for Shear Thickening Suspensions

2009

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We report on rheometry measurements to characterize critical behavior in two model shear thickening suspensions: cornstarch in water and glass spheres in oil. The slope of the shear thickening part of the viscosity curve is found to increase dramatically with packing fraction and diverge at a critical packing fraction φc. The magnitude of the viscosity and the yield stress are also found to have scalings that diverge at φc. We observe shear thickening as long as the yield stress is less than the stress at the viscosity maximum. Above this point the suspensions transition to purely shear thinning. Based on these data we present a dynamic jamming phase diagram for suspensions and show that a limiting case of shear thickening corresponds to a jammed state.In Newtonian fluids the viscosity does not change with applied shear rate, while non-Newtonian fluids usually show a decrease of viscosity when sheared faster, i. e., they shear thin. The opposite behavior, shear thickening, is less common but can be quite dramatic: beyond a certain shear rate the viscosity increases potentially by orders of magnitude. This behavior is reversible so the stress relaxes when the shear is removed. Reported shear thickening fluids are usually densely packed colloids or suspensions [1,2,3]. Strong shear thickening can be observed for example with cornstarch in water. Shear thickening is a concern across a range of industrial processes [1,4] and is of interest for the ability to absorb energy from impacts [5].It has been suggested [3,6,7,8,9,10,11,12,13,14,15,16,17] that shear thickening is related to the phenomenon of jamming. The concept of a jamming transition, however, applies to the limit of vanishing shear rate and is exemplified by the onset of glassy behavior with a seemingly diverging viscosity in molecular liquids, dense packings of colloids, or macroscopic granular materials, leading to the appearance of a yield stress below which there is no flow [18,19,20]. Shear thickening, on the other hand, occurs at non-zero shear rate. While a yield stress has been measured in some shear thickening fluids [8], no linkage has been established between such yield stress and the observed shear thickening behavior. Dense shear thickening fluids have been reported to exhibit seemingly discontinuous jumps in stress with increasing shear rate [7,14,17,21,22,23,24,25]. However, this discontinuity has not yet been characterized quantitatively. Phenomenological shear thickening models have shown stress distributions that are similar to those of force chains in jammed systems [6,10]. However, the mild shear thickening behavior found in simulations [10,26,27,28] so far cannot reproduce the dramatic increases in viscosity with shear rate observed in many experiments. As a result, the connection between shear thickening and the onset of jamming has been qualitative and many details of the relationship remain unresolved.Here we characterize the stress-shear rate discontinuity and the relationship to the yield stress through rheological measurements. T...

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“…28 The remaining sodium pyrophosphate and citrate slips displayed initial shear thinning flow profiles at low shear rates, followed by shear thickening flow profiles at higher shear rates. The microstructural origins of why thickening takes place are not resolved, 29 although two explanations have been proposed: Hoffman's order-disorder transition (ODT) 30,31 and the "cluster formation" mechanism. [32][33][34][35][36] From the observed results, the ODT theory was favoured to explain the reasons for shear thickening taking place since the phenomenon was only observed in ordered, stable slips.…”

Section: Rheological Characterisationmentioning

confidence: 99%