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Characteristics and mechanisms of electrorheological fluids |
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| Authors: | Hans Conrad Arnold F. Sprecher |
| Affiliation: | (1) Materials Science and Engineering Department, North Carolina State University, 27695-7907 Raleigh, North Carolina |
| Abstract: | Electrorheological (ER) fluids consist of suspensions of fine polarizable particles in a dielectric medium, which upon application of an electric field take on the characteristics of a solid in times of the order of milliseconds and reversibly return to liquid behavior upon removal of the field. The rheology, electrical characteristics, and structure of typical ER fluids are here reviewed. The proposed mechanisms and their accord with experimental data are discussed. Some directions for future research are mentioned. |
| Keywords: | Electrorheology yield stress Bingham solid viscoelasticity dielectric constant electric field fibrous structure dipole moment suspension attractive force viscosity Mason number |
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