Field-Controllable Fluids
The two major classes of field-controllable fluids are electrorheological (ER) and magnetorheological (MR) fluids, which involve suspensions or slurries of solid particulates in liquids. The response of these fluids to an applied field is the familiar chaining of the particles in the field direction and the resulting solidification or increase in the apparent viscosity of the fluids, Figure 1. In ER fluids, a high electric field (~ 1 kV/mm) is required to produce this response, while in MR fluids a high magnetic field (~ 100 kA/m) is necessary. These dramatic and reversible field-induced rheological changes permit the construction of many novel electromechanical devices that are of potential utility in the automotive, aerospace, medical and other industries. Therefore, the main aim of this research is directed towards the exploitation of commercial potential of these fluids particularly the development of a novel form of semi-active devices for adaptive control of mechanical and structural disturbances, which can replace the conventional passive dampers.
Papers
- El Wahed, A. K., Sproston, J. L. and R. Stanway, "The rheological characteristics of electrorheological fluids in dynamic squeeze", Journal of Intelligent Material Systems and Structures, Vol. 13, No. 10, pp. 655-660, 2002
- El Wahed, A. K., Stanway, R. and Sproston, J. L., "The influence of mechanical input amplitude on the dynamic response of an electrorheological fluid in squeeze flow", Int. Journal Vehicle Design, Vol. 33, Nos. 1-3, pp. 153-170, 2003 .
- El Wahed, A. K., Sproston, J. L., R. Stanway and Williams, W., "An improved model of ER fluids in squeeze-flow through model updating of the estimated yield stress", Journal of Sound and Vibration, Vol. 268, pp. 581-599, 2003 .
Contact
- Dr Ali El Wahed (a.elwahed@dundee.ac.uk)
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