RHEOLOGY OF ELECTRORHEOLOGICAL FLUIDS

被引:143
作者
HALSEY, TC
MARTIN, JE
ADOLF, D
机构
[1] UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637
[2] SANDIA NATL LABS,ALBUQUERQUE,NM 87185
关键词
D O I
10.1103/PhysRevLett.68.1519
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We present experimental and theoretical results on the shear thinning of electrorheological fluids. Rheological measurements on a model fluid consisting of monodisperse silica spheres immersed in a dielectric liquid show a power-law dependence-mu is-proportional-to gamma(-DELTA) of the apparent viscosity-mu on the strain rate-gamma, with DELTA in the range DELTA = 0.68-0.93. We present a theoretical treatment of steady-state cluster formation in applied electric and shear fields, which correctly predicts the observed power-law shear thinning, albeit with an exponent DELTA = 2/3 . We observe no true yield stress in this material.
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页码:1519 / 1522
页数:4
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