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thickening of the suspension

  • (PDF) Shear thickening of cornstarch suspensions

    We study two well-known shear-thickening suspensions: a cornstarch suspension in water and salt (3,19,22,24, 25) and monodisperse suspension of polyvinyl chloride (PVC) particles in a Newtonian

  • (PDF) Shear thickening of cornstarch suspensions Daniel

    Academia.edu is a platform for academics to share research papers.

  • Shear Thickening of Concentrated Suspensions: Recent

    Shear thickening is the increase of the apparent viscosity as shear rate or shear stress increases. This phenomenon is pronounced in concentrated (dense) suspensions of both colloidal-scale and larger particles, with an abrupt form, known as discontinuous shear thickening, observed as the maximum flowable solid fraction is approached.

  • The role of dilation and confining stresses in shear

    Because the above features of Discontinuous Shear Thickening are similar in both the suspension and colloid regimes, we refer to data in both regimes even though the domi-nant forces may be different. DILATION AND CONFINING STRESS IN SUSPENSIONS 877.

  • Stress Components and Shear Thickening of Concentrated

    Sep 23, 2000· Continuous shear thickening was measured for the sample with 0.54 volume fraction while the samples with volume fractions 0.59 and 0.63 showed discontinuous shear thickening. Shear thickening in these concentrated suspensions was related to the effect of particle clustering increasing the effective volume fraction above maximum packing fraction.

  • Discontinuous shear thickening in Brownian suspensions by

    Dec 15, 2015· Colloidal shear thickening is a phenomenon by which a dense mixture (or suspension) of sub–micrometer-sized particles in a fluid becomes more viscous when strained. It has important (mostly negative) consequences as dense suspensions are found in many industrial processes. Its origin is a long-standing unsolved problem in soft-matter physics.

  • Two-Step Discontinuous Shear Thickening of Dilute Inertial

    Although its simpleness, the suspension model with this potential exhibits complex rheology.16–18) Kawasaki et al.17) used this model for denser cases, and they reported that the flow curve shows the shear thinning, shear thickening, and again shear thinning behaviors as the shear rate increases when the density is lower than the jamming

  • Microscopic mechanism for the shear-thickening of non

    Microscopic mechanism for the shear-thickening of non-Brownian suspensions Nicolas Fernandez,1 Roman Mani,2 David Rinaldi,3 Dirk Kadau,2 Martin Mosquet,3 H´elene Lombois-Burger,3 Juliette Cayer-Barrioz,4 Hans J. Herrmann,2 Nicholas D. Spencer,1 and Lucio Isa1,∗ 1Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich, Switzerland 2Computational Physics for

  • (PDF) Dynamic properties of shear thickening colloidal

    For a suspension of monodisperse spheres suspended in a low viscosity fluid (1–10 mPa⋅s), the onset of shear thickening is very dependent on the sphere diameter, approximately according to an

  • Anisotropic Nanoparticles Contributing to Shear-Thickening

    The fumed silica suspension’s shear-thickening process can be explained by considering the formation of shear-induced hydroclusters. MWNTs or GONPs in fumed silica suspensions influence rheological responses and hydrocluster formation. Nanotubes disentangle and start to orient in the flow direction with increasing shear rates.

  • Two-Step Discontinuous Shear Thickening of Dilute Inertial

    Although its simpleness, the suspension model with this potential exhibits complex rheology.16–18) Kawasaki et al.17) used this model for denser cases, and they reported that the flow curve shows the shear thinning, shear thickening, and again shear thinning behaviors as the shear rate increases when the density is lower than the jamming

  • THICKENING OF SOY PROTEIN SUSPENSIONS WITH CALCIUM

    The established optimum thickening conditions leading to a stable homogenous suspension involved addition of 12.5 mM CaCI, to 5% protein suspension preheated at 8OoC for 30 min. 1. Introduction Modifications of rheological properties are often desired in the fabrication of soy protein based foods.

  • Microstructure and thickening of dense suspensions under

    Dense suspensions are non-Newtonian fluids that exhibit strong shear thickening and normal stress differences. Using numerical simulation of extensional and shear flows, we investigate how rheological properties are determined by the microstructure that is built under flows and

  • Shear thickening of suspensions of porous silica

    Jun 17, 2015· In this work, shear thickening (ST) performance of a novel suspension of porous silica nanoparticles was systematically studied. The porous silica nanoparticles which were synthesized by using CTAB as a pore-forming agent were dispersed into ethylene glycol to form shear thickening fluid (STF). Both the steady and oscillatory shear rheological properties of the STF were characterized.

  • Shear Thickening of Cornstarch Suspensions

    We thus propose that the discontinuous shear thickening of cornstarch suspensions is a consequence of dilatancy: the system under flow attempts to dilate but instead undergoes a jamming transition because it is confined. This proposition is confirmed by an independent measurement of the dilation of the suspension as a function of the shear rate.

  • Shear thickening of stone starch suspensions: Does

    Apr 15, 2013· A suspension of stone starch particles in water is the most well-known example of a shear thickening system. The unparalleled combination of fluid and solid-like behavior displayed by stone starch suspensions has allowed people to perform the seemingly impossible feat of “walking on water”.

  • Revealing the frictional transition in shear-thickening

    May 16, 2017· The striking result is that, under the same flowing conditions, the shear-thickening suspension of potato starch particles yields a much lower avalanche angle (picture in Fig. 1B, Right and data in Fig. 1C, Right). The suspension can flow steadily with an angle of avalanche as small as θ

  • Dilation and confining stresses in shear thickening of

    shear thickening is often called Continuous Shear Thick-ening. If the stress/shear-rate relation in the shear thick-ening regime is expressed τ ∼ γ˙α, we can thus identify shear thickening in a suspension as Discontinuous if an α>2 can be observed at high packing fractions and αin-creases with packing fraction, and Continuous if α≤ 2 at

  • Dilatant Wikipedia

    Shear thickening behavior is typically observed in suspensions of small, solid particulates, indicating that the particle-particle Hamaker attraction is the dominant force. Therefore, stabilizing a suspension is dependent upon introducing a counteractive repulsive force. Hamaker theory describes the attraction between bodies, such as particulates.

  • Thickening agent Wikipedia

    A thickening agent or thickener is a substance which can increase the viscosity of a liquid without substantially changing its other properties. Edible thickeners are commonly used to thicken sauces, soups, and puddings without altering their taste; thickeners are also used in paints, inks, explosives, and cosmetics.. Thickeners may also improve the suspension of other ingredients or emulsions

  • Shear thickening of dense suspensions: The role of

    Oct 16, 2019· Shear thickening of particle suspensions is caused by a transition between lubricated and frictional contacts between the particles. Using three-dimensional (3D) numerical simulations, we study how the interparticle friction coefficient (μ m) influences the effective macroscopic friction coefficient (μ) and hence the microstructure and rheology of dense shear thickening suspensions.

  • Tunable shear thickening in suspensions PNAS

    Sep 27, 2016· When a concentrated suspension is strained, its viscosity can increase radically. This behavior, known as shear thickening, can be very useful to technological applications or highly problematic in industrial processes. Suspension flow properties are typically specified at the formulation stage, meaning that they are fixed in advance rather than controlled in situ during application.

  • Shear-Thickening Response of Fumed Silica Suspensions

    In this study, we report the shear-thickening as well as tration in the suspension was varied between 3 and 10% (w/ strain-thickening behavior of nonflocculated fumed silica w basis). suspensions. Fumed silica is an amorphous, nonporous silica Rheological experiments were carried out on a Rheome-prepared by a flame hydrolysis process (15, 16).

  • Microscopic mechanism for the shear-thickening of non

    Microscopic mechanism for the shear-thickening of non-Brownian suspensions Nicolas Fernandez,1 Roman Mani,2 David Rinaldi,3 Dirk Kadau,2 Martin Mosquet,3 H´elene Lombois-Burger,3 Juliette Cayer-Barrioz,4 Hans J. Herrmann,2 Nicholas D. Spencer,1 and Lucio Isa1,∗ 1Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich, Switzerland 2Computational Physics for

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