Results 111 to 120 of about 24,927 (159)

Shear Thinning of Noncolloidal Suspensions

Physical Review Letters, 2016
Shear thinning-a reduction in suspension viscosity with increasing shear rates-is understood to arise in colloidal systems from a decrease in the relative contribution of entropic forces. The shear-thinning phenomenon has also been often reported in experiments with noncolloidal systems at high volume fractions.
Marco Ellero, Adolfo Vázquez-Quesada, Roger Tanner   +2 more
exaly   +5 more sources

Shear thinning of nanoparticle suspensions

Physical Review E, 2009
Results of large scale nonequilibrium molecular dynamics simulations are presented for nanoparticles in an explicit solvent. The nanoparticles are modeled as a uniform distribution of Lennard-Jones particles, while the solvent is represented by standard Lennard-Jones particles.
Pieter J, In 't Veld, Matt K, Petersen, Gary S, Grest   +2 more
openaire   +2 more sources

Structuring Sedimentation in a Shear-Thinning Fluid

Physical Review Letters, 2005
We study the sedimentation of suspensions of monodisperse non-Brownian particles in a shear-thinning polymeric fluid. We observe the formation of particle-rich structures and show that they are associated with a well-defined flow pattern. The results suggest that the observed structuring is a consequence of particle aggregation that amplifies ...
Mora, S., Talini, L., Allain, C.
openaire   +2 more sources

Discontinuous shear thinning in ordered suspensions

Physical Review Letters, 1990
The flow properties of concentrated suspensions having crystalline order at rest are reported. The suspensions contain charge stabilized particles and the softness of particle interaction is altered by varying the suspending phase ionic strength. The suspensions display a yield stress ${\mathrm{\ensuremath{\tau}}}_{\mathit{y}}$, and for stresses larger
, Chen, , Zukoski
openaire   +2 more sources

Viscoelasticity and shear thinning of nanoconfined water

Physical Review E, 2014
Understanding flow properties and phase behavior of water confined to nanometer-sized pores and slits is central to a wide range of problems in science, such as percolation in geology, lubrication of future nano-machines, self-assembly and interactions of biomolecules, and transport through porous media in filtration processes.
Karan, Kapoor, , Amandeep, Shivprasad, Patil   +2 more
openaire   +2 more sources

Shear thinning in non-Brownian suspensions

Soft Matter, 2018
We study the flow of suspensions of non-Brownian particles dispersed in a Newtonian solvent.
Chatté, Guillaume, Comtet, Jean, Niguès, Antoine, Bocquet, Lydéric, Siria, Alessandro, Ducouret, Guylaine, Lequeux, François, Lenoir, Nicolas, Ovarlez, Guillaume, Colin, Annie   +9 more
openaire   +4 more sources

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
openaire   +1 more source

Shear-thinning of polydisperse suspensions

Journal of Physics D: Applied Physics, 2008
The effects of the polydispersivity of the particle phase on the rheology of suspensions are studied with falling-ball rheometry. The model suspensions consist of large, neutrally buoyant spheres in a viscous Newtonian suspending fluid. The experiments determine the average velocity of the settling particle along the centreline or axis of the ...
P T Reardon, S Feng, A L Graham, V Chawla, R S Admuthe, J Abbott   +5 more
openaire   +1 more source

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
openaire   +1 more source

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 ...
openaire   +1 more source