Effects of nonmagnetic interparticle forces on magnetorheological fluids

被引：31
|
作者：
Klingenberg, D. J. [1 ,2 ]
Olk, C. H. [3 ]
Golden, M. A. [3 ]
Ulicny, J. C. [3 ]
机构：
[1] Univ Wisconsin, Chem & Biol Engn Dept, Madison, WI 53706 USA
[2] Univ Wisconsin, Rheol Res Ctr, Madison, WI 53706 USA
[3] Gen Motors R&D & Planning, Warren, MI 48090 USA
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2010年 / 22卷 / 32期
关键词：
SHEAR-FLOW;
D O I：
10.1088/0953-8984/22/32/324101
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Effects of nonmagnetic interparticle forces on the on- and off-state behavior of magnetorheological fluids are investigated experimentally and with particle-level simulations. Suspensions of iron particles in an aliphatic oil are modified by surface-active species. The modifications significantly alter the off-state properties, but have little impact on the field-induced stresses. Simulations show similar behavior. Off-state rheological properties are strongly influenced by van der Waals forces and modifications of the short-range repulsive forces. Field-induced stresses are less sensitive to the nonmagnetic forces.
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页数：4
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