Results 211 to 220 of about 5,056 (258)
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Electrorheological effects of polyaniline‐type electrorheological fluids
Journal of Applied Polymer Science, 2002AbstractThree kinds of particles—polyaniline (PANI), poly(o‐toludine) (POT), and brominated polyaniline (Br‐PANI)—were synthesized. With chlorinated paraffin as a disperse oil, their electrorheological (ER) effects were determined so that the influence of the phenyl substitute group on the ER effects could be considered.
Liucheng Zhang, Kai Su, Xiucuo Li
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Electrorheological fluids using bi-dispersed particles
Physica B: Condensed Matter, 1998We 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, 2005Transient 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 +3 more
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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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Electrorheological (ER) Fluids
2016Electrorheological (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 +3 more
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Electrorheological-fluid-based microvalves
Applied Physics Letters, 2005We 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, 2000The 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 +4 more
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Pattern Formation in Flowing Electrorheological Fluids
Physical Review Letters, 2002A 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 +3 more
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Onsager Principle and Electrorheological Fluid Dynamics
Progress of Theoretical Physics Supplement, 2008The 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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