Results 141 to 150 of about 754 (161)
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Study on Electrorheological Characteristics of Polythiophene-based Electrorheological Fluid
Electromagnetic Materials, 2005Electrorheological (ER) fluids are typically composed of polarizable particles dispersed in a nonconducting fluid. Upon the application of an electric field, chain-like or fibrillar aggregates of the suspended particles are oriented along the direction of the electric field, thereby inducing viscoelasticity and a drastic increase in viscosity.
Datchanee Chotpattananont +2 more
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Negative electrorheological fluids
Journal of Rheology, 2013Electrorheological (ER) fluids are electroresponsive materials that have been extensively investigated for several decades. Despite negative ER fluids being one of the most promising new class of candidate materials for various potential applications, only positive ER fluids have been widely used thus far.
Young Gun Ko, Ung Su Choi
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Analysis of giant electrorheological fluids
Journal of Colloid and Interface Science, 2013The yield stress dependence on electric field strength for giant electrorheological (GER) fluids over the full range of electric fields was examined using Seo's scaling function which incorporated both the polarization and the conductivity models. If a proper scaling was applied to the yield stress data to collapse them onto a single curve, the Seo's ...
Youngwook P, Seo, Yongsok, Seo
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Boundary effect in electrorheological fluids
Physical Review E, 2011The effect of the boundary friction coefficient on the rheological properties of the electrorheological (ER) fluids in quasistatic and dynamic states is investigated by computer simulation. The relation between the shear stress and the boundary friction coefficient in quasistatic and dynamic states is discussed qualitatively and quantitatively, and the
X L, Gong +5 more
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Conductivity in Electrorheology
International Journal of Modern Physics B, 1999Analytical models for the quasi-static ER behavior of suspensions have been developed which take into consideration both the conductivity and dielectric mismatches between the components and the supra-ohmic behavior of the host liquid. Included are models for: (a) slightly conducting particles, (b) insulating particles with a conducting film and (c ...
H. Conrad, C. W. Wu, X. Tang
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Electrorheological fluids: structures and mechanisms
Soft Matter, 2008Electrorheology denotes the control of a colloid's flow properties through an electric field. We delineate the basic characteristics of electrorheological (ER) fluids, and show that the use of an effective dielectric constant concept can yield quantitative predictions.
Wen, Weijia +2 more
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Electro-osmosis of electrorheological fluids
Physical Review E, 2013Electrorheological fluids are suspensions that are characterized by a strong functional dependence of the constitutive behavior of the fluids on the electric field. In this work, we consider electro-osmosis of an electrorheological fluid through a channel where a transverse, nonuniform electric field is spontaneously induced due to the presence of an ...
Jayabrata, Dhar +2 more
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Continuum modelling of electrorheological fluids
Electrorheological Fluids and Magnetorheological Suspensions, 2002A thermodynamical continuum modelling is proposed for electrorheological fluids. This theormodynamical approach tries to describe the response of an electrorheological fluid in the solid phase (which means with an applied adequate electric field) under mechanical solicitations. Thermodynamic formulations distinguish the contributions due to reversible
DROUOT R, NAPOLI, Gaetano, RACINEUX G.
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Electrorheological Properties of Micro Balloons
IEEE Industry Applications Magazine, 1995In this article, the relation between the densities of particles in electrorheological (ER) fluids and the electrorheological effects was investigated. Micro balloons, used as particles, were dispersed in silicon oil, which was used as the base fluid.
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MULTISCALE ANALYSIS OF ELECTRORHEOLOGICAL FLUIDS
International Journal of Modern Physics B, 2002We construct a microscale model for a rigid particle suspension in a viscous fluid that includes Maxwell electrostatic forces. Via homogenization techniques we characterize the properties the material exhibits at the macroscale. The change in the effective constitutive equations is due to the highly oscillating electrostatic forces.
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