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Type: Artigo de periódico
Title: Evaluation of a governing equation for the macroscopic dynamics of electrorheological fluids
Author: Neto, LBP
Arruda, ACF
Vieira, SL
Abstract: An analytical equation of motion is proposed to model the dynamics of change of electrorheological fluids under the influence of simultaneous shear (gamma) and electrostatic (E) fields of force. This is accomplished with the use of constitutive relations written down by Mason and collaborators [A. Okagawa, R. G. Cox, and S. G. Mason, J. Colloid Interface Sci. 47, 536 (1974)] for the electrostatic and hydrodynamic stresses developed in the fluid. The properties of the suspension are considered in a way that both the dielectric and conductive characters of particles and suspending fluid are comprised. From the model results an equation relating eta to E and gamma, a characteristic apparent viscosity, that is not restricted to a simple quadratic dependence with E, a usual degree of functional dependence from which more recent experimental results, thus far inexplicably, seem to deviate. Experimental results will be compared to the theoretical predictions. (C) 2001 American Institute of Physics.
Country: EUA
Editor: Amer Inst Physics
Citation: Journal Of Applied Physics. Amer Inst Physics, v. 89, n. 8, n. 4657, n. 4663, 2001.
Rights: aberto
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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