Enhancing Yield Stress Of Electrorheological Fluids With Liquid Crystal Additive
The enhancement of yield stress of NaY/insulating oil electrorheological (ER) fluid is found by adding a liquid crystal additive with a higher dielectric constant than that of the carrier fluid. The yield stress increases with additive's concentration and saturates at high concentrations. A polarization model has been suggested to understand the role of the additives. The theoretical calculations agree with our experiments very well. We show that adding a small amount of additive with a high dielectric constant can drastically improve the yield stress even in a `dry' ER fluid if the conductivity or dielectric constant of the additive is still much smaller than that of the dispersed particles.
Journal of Physics D: Applied Physics
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Duan, Xiaodong; Chen, Hong; and He, Yuanjin, "Enhancing Yield Stress Of Electrorheological Fluids With Liquid Crystal Additive" (2000). Scopus Export 2000s. 865.