Influences of geometry of particles on electrorheological fluids

Electrorheological (ER) fluids with microspheres and micro-rods as the component solid phase were examined experimentally to investigate the influences of particle geometry on ER performance. It is observed that for both dried and water-activated ER fluids, the shape of the constituent particles pla...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2002-09, Vol.35 (17), p.2231-2235, Article 322
Main Authors: Qi, Yabing, Wen, Weijia
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Electro- and magnetorheological fluids
Exact sciences and technology
Material types
Physics
Rheology
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Summary:Electrorheological (ER) fluids with microspheres and micro-rods as the component solid phase were examined experimentally to investigate the influences of particle geometry on ER performance. It is observed that for both dried and water-activated ER fluids, the shape of the constituent particles plays a significant role, i.e., for particles with same diameters, the microsphere-based ER fluids show better ER performance than micro-rod-based ER fluids. We found from experiments that the aspect ratio of particles is an important parameter for the ER activities. The tendency is that the ER effect decreases with the increase of the aspect ratio, while this phenomenon becomes much weaker in the case when dried particles were substituted for the ones with moisture. (Author)
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/35/17/322