Relaxation of surface charge on rotating dielectric spheres: Implications on dynamic electrorheological effects

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dc.creatorWan, Jones T. K.
dc.creatorYu, K. W.
dc.creatorGu, G. Q.
dc.date2001-09-12
dc.date.accessioned2026-07-07T02:42:42Z
dc.date.available2026-07-07T02:42:42Z
dc.descriptionWe have examined the effect of an oscillatory rotation of a polarized dielectric particle. The rotational motion leads to a re-distribution of the polarization charge on the surface of the particle. We show that the time averaged steady-state dipole moment is along the field direction, but its magnitude is reduced by a factor which depends on the angular velocity of rotation. As a result, the rotational motion of the particle reduces the electrorheological effect. We further assume that the relaxation of polarized charge is arised from a finite conductivity of the particle or host medium. We calculate the relaxation time based on the Maxwell-Wagner theory, suitably generalized to include the rotational motion. Analytic expressions for the reduction factor and the relaxation time are given and their dependence on the angular velocity of rotation will be discussed.
dc.descriptionAccepted for publications by Phys. Rev. E
dc.identifierhttps://arxiv.org/abs/cond-mat/0109206
dc.identifierhttp://arxiv.org/abs/cond-mat/0109206
dc.identifierPhys. Rev. E 64, 061501 (2001).
dc.identifierdoi:10.1103/PhysRevE.64.061501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/18245
dc.subjectSoft Condensed Matter
dc.subjectMaterials Science
dc.titleRelaxation of surface charge on rotating dielectric spheres: Implications on dynamic electrorheological effects
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