Relaxation of polydisperse electrorheological suspensions
作者:
K. H. Ahn,
D. J. Klingenberg,
期刊:
Journal of Rheology
(AIP Available online 1994)
卷期:
Volume 38,
issue 3
页码: 713-741
ISSN:0148-6055
年代: 1994
DOI:10.1122/1.550482
出版商: The Society of Rheology
关键词: SUSPENSIONS;ELECTROHYDRODYNAMICS;SHEAR FLOW;RELAXATION TIME;POLARIZATION;PERTURBATION THEORY;ELECTRIC FIELD EFFECTS;STRESSES
数据来源: AIP
摘要:
Relaxation of monodisperse and polydisperse electrorheological (ER) suspensions under linear deformation is investigated. The electrostatic polarization model is employed to describe ER suspensions, and solutions to the equations of motion are obtained by dynamic simulation and regular perturbation methods. Sources of relaxation events are identified by examining partial rheological functions that are defined in the text. Relaxation of both monodisperse and polydisperse suspensions is found to be confined to approximately the same limited range of relaxation times, although polydisperse suspensions may produce relaxation events over a very broad range of relaxation times. Events occurring at large relaxation times arise from relatively weak forces that do not significantly influence the extent of relaxation. Other relaxation mechanisms and potential sources of dispersion broadening are also discussed.
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