Results 161 to 170 of about 3,761 (206)

Electrorheological fluids using bi-dispersed particles

Physica B: Condensed Matter, 1998
We report very large enhancement of static yield stress for electrorheological fluids by adding ferroelectric nanoparticles of lead zirconate titanate (PZT) or lead titanate (PbTiO3) to ER fluids consisting of 50 μm glass spheres. It is found that the enhancement peaks at certain nanoparticle/microparticle ratios for fixed solid/liquid volume fractions.
Tam, Wing Yim, Wen, Weijia, Sheng, Ping
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Transient response of compressed electrorheological fluid

Journal of Colloid and Interface Science, 2005
Transient behaviors of a compressed electrorheological (ER) fluid based on zeolite and silicone oil have been experimentally investigated. The ER fluid is purely compressed between two parallel plates. Compressive speed and voltage amplitude effects on the transient process and randomly applied on/off voltages have been studied.
Yu, Tian, Minliang, Zhang, Yonggang, Meng, Shizhu, Wen   +3 more
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MULTISCALE ANALYSIS OF ELECTRORHEOLOGICAL FLUIDS

International Journal of Modern Physics B, 2002
We 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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Electrorheological (ER) Fluids

2016
Electrorheological (ER) fluids, similar to the MR fluids, belong to the general class of smart materials whose rheological characteristics are identified by applying an electric field instead of magnetic field in MR fluids. In other words, the ER fluids consist of electrical polarizable particles dispersed in carrier fluid with surfactant complimentary,
Abdollah Hajalilou, Saiful Amri Mazlan, Hossein Lavvafi, Kamyar Shameli   +3 more
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Electrorheological-fluid-based microvalves

Applied Physics Letters, 2005
We present the successful design and fabrication of push-and-pull microvalves that use a giant electrorheological (GER) fluid. Our multilayer microvalves, including the GER fluid control channel, the electrode, the flow channel, and the flexible membrane, are fabricated with polydimethylsioxane-based materials by soft lithography techniques.
Niu, Xize, Wen, Weijia, Lee, Yi-Kuen
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ELECTRORHEOLOGICAL FLUIDS UNDER SHEAR

International Journal of Modern Physics B, 2000
The behavior of an electrorheological (ER) chain under a shear force is investigated theoretically and experimentally. Contrary to the conventional assumption that the ER chain under a shear force becomes slanted and breaks at the middle, we have found that there is symmetry breaking.
R. Tao, J. Zhang, Y. Shiroyanagi, X. Tang, X. Zhang   +4 more
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Pattern Formation in Flowing Electrorheological Fluids

Physical Review Letters, 2002
A two-fluid continuum model is developed to describe mass transport in electro- and magnetorheological suspensions. The particle flux is related to the field-induced stresses. Solutions of the resulting mass balance show column formation in the absence of flow, and stripe formation when a suspension is subjected simultaneously to an applied electric ...
Karl, von Pfeil, Michael D, Graham, Daniel J, Klingenberg, Jeffrey F, Morris   +3 more
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Onsager Principle and Electrorheological Fluid Dynamics

Progress of Theoretical Physics Supplement, 2008
The formulation of the fluid dynamics of an electrorheological medium is given based on the Onsager principle of minimum energy dissipation. The consideration of the energetics of dipole-dipole interaction among the solid particles immersed in the fluid -- the induced dipole-dipole interaction included -- is used to derive the hydrodynamic equations ...
Sheng, Ping, Zhang, Jianwei, Liu, Chun
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Electrorheological Fluids

Scientific American, 1993
Thomas C. Halsey, James E. Martin
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Ground state of an electrorheological fluid

Physical Review A, 1992
The ground state of an electrorheological fluid is examined for high dielectric contrast (∈ p /∈ f →∞). In contrast to the result of Tao and Sun (Phys. Rev. Lett. 67, 398 (1991)] for the dipole limit, three structures are found to be degenerate: face-centered cubic, hexagonal close packed, and body-centered tetragonal.
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