A structural viscosity model for magnetorheology

被引：43
作者：
Berli, Claudio L. A. [1 ]
de Vicente, Juan [2 ]
机构：
[1] INTEC UNL CONICET, RA-3000 Santa Fe, Argentina
[2] Univ Granada, Fac Sci, Dept Appl Phys, E-18071 Granada, Spain
来源：
APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 02期
关键词：
ELECTRORHEOLOGICAL FLUIDS; SHEAR-FLOW; RHEOLOGY; BEHAVIOR; SUSPENSIONS; ENERGY;
D O I：
10.1063/1.4734504
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A structural viscosity model is proposed, which describes the shear viscosity from the balance between build up (magnetic field-induced clustering) and breakdown (shear-induced breakup) of particle aggregates. The model accounts for typical deviations from Bingham model predictions that are extensively reported in the MR literature. More precisely, the model (i) provides a physical ground for the observed Casson-like shear flow behaviour, (ii) predicts the existence of a low shear plateau in weak MR fluids, and (iii) asymptotically recovers the typical Bingham-like behavior that is observed in (strong) conventional MR fluids at experimentally accessible times. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4734504]
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