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Dynamic response times of electrorheological fluids in steady shear

Wang, Z., Lin, Z. F., Fang, H. P. and Tao, R. B. (1998) Dynamic response times of electrorheological fluids in steady shear. Journal of Applied Physics, 83 (2). pp. 1125-1131. ISSN 0021-8979

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To link to this item DOI: 10.1063/1.366804


Transient responses of electrorheological fluids to square-wave electric fields in steady shear are investigated by computational simulation method. The structure responses of the fluids to the field with high frequency are found to be very similar to that to the field with very low frequency or the sudden applied direct current field. The stress rise processes are also similar in both cases and can be described by an exponential expression. The characteristic time tau of the stress response is found to decrease with the increase of the shear rate (gamma) over dot and the area fraction of the particles phi(2). The relation between them can be roughly expressed as tau proportional to(gamma) over dot(-3/4)phi(2)(-3/2). The simulation results are compared with experimental measurements. The aggregation kinetics of the particles in steady shear is also discussed according to these results.

Item Type:Article
Divisions:Science > School of Mathematical, Physical and Computational Sciences > Department of Mathematics and Statistics
ID Code:38029
Publisher:American Institue of Physics

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