Results 221 to 230 of about 24,680 (258)

Optimal Control of Shear-Thinning Fluids

SIAM Journal on Control and Optimization, 2012
The aim of this paper is to establish necessary optimality conditions for optimal control problems governed by steady, incompressible Navier--Stokes equations with shear-dependent viscosity. The main difficulty is related to the differentiability of the control-to-state mapping and is overcome by introducing a family of smooth approximate control ...
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Shear Thinning and Orientational Ordering of Wormlike Micelles

Physical Review Letters, 2005
Shear thinning and orientation of cylindrical surfactant and block copolymer micelles was investigated by rheo-SANS (small-angle neutron scattering) experiments. Shear thinning and orientation occur for shear rates (.)gamma tau(dis)>>1, where tau(dis) is the disentanglement time of the micelles.
S, Förster, M, Konrad, P, Lindner
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Shear thinning and thickening rheology

Journal of Colloid and Interface Science, 1977
Abstract Particles with radii 21–1010 nm, of methyl methacrylate homopolymer or copolymers with ethyl acrylate, were dispersed in high-boiling hydrocarbons. The stabilizer contained poly(12-hydroxystearic) acid. Viscosities at shear rates of 1–104 sec−1 were measured with cone and plate (Weissenberg rheogoniometer), becoming steady almost ...
Charles E Chaffey, Ian Wagstaff
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Mesoscale modeling of shear-thinning polymer solutions

The Journal of Chemical Physics, 2014
We simulate the linear and nonlinear rheology of two different viscoelastic polymer solutions, a polyisobutylene solution in pristane and an aqueous solution of hydroxypropylcellulose, using a highly coarse-grained approach known as Responsive Particle Dynamics (RaPiD) model.
I. S. Santos de Oliveira, B. W. Fitzgerald, W. K. den Otter, W. J. Briels   +3 more
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Shear thinning of colloidal dispersions

Journal of Rheology, 1998
In this paper we calculate numerically the shear induced distortion of the equilibrium microstructure in a dilute colloidal suspension. In the low density limit, our predictions both with and without hydrodynamic interactions follow the form of the Ree–Eyring equation for the shear rate dependence of the rheology.
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Shear-Thinning and Dilatant Rheologies

1994
The rheological properties of crowded suspensions and pastes of powders dispersed in liquids is of fundamental importance to the forming properties of any ceramic article formed by the wet process. This includes such diverse products as brick and tile, whitewares, many refractories, electronic ceramics, and high performance ceramics.
James E. Funk, Dennis R. Dinger
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A Modification of Murray's Law for Shear-Thinning Rheology

Journal of Biomechanical Engineering, 2015
This study reformulates Murray's well-known principle of minimum work as applied to the cardiovascular system to include the effects of the shear-thinning rheology of blood. The viscous behavior is described using the extended modified power law (EMPL), which is a time-independent, but shear-thinning rheological constitutive equation.
Patrick M, McGah, Massimo, Capobianchi
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Shear thickening-shear thinning and shear thinning-shear thickening transitions in polymeric systems

Caderno Pedagógico
This review explores the complex rheological behaviors of hydrogels, specifically focusing on shear thinning-shear thickening (PD) and the less common shear thickening-shear thinning (DP) transitions. While shear thinning (viscosity decrease with increasing shear rate) is widely utilized in applications like 3D printing and injectables, and shear ...
José Edilson Neves, Taynah Pereira Galdino, Antonio Gilson Barbosa de Lima, Marcus Vinicius Lia Fook, Rômulo Feitosa Navarro   +4 more
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Shear thinning near the critical point of xenon

Physical Review E, 2008
We measured shear thinning, a viscosity decrease ordinarily associated with complex liquids, near the critical point of xenon. The data span a wide range of reduced shear rate: 10(-3)
Robert F, Berg, Michael R, Moldover, Minwu, Yao, Gregory A, Zimmerli   +3 more
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Shear thinning in concentrated dispersions

Journal of Physics: Condensed Matter, 1996
A theory is presented to predict the effective shear viscosity of concentrated dispersions in steady state shear flow as a function of the volume fraction, particle size, interparticle interactions, and shear rate. Shear thinning has been qualitatively argued to be a result of shear-induced change in microstructure, which we shall discuss in terms of ...
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