Modeling and analysis of electrorheological suspensions in shear flow

Abstract

A new rheological model was applied to the analysis of the electrorheological behavior of a fluid containing silica nanoparticle-decorated polyaniline nanofibers. A model's predictions were compared with the experimental data, revealing that the proposed model correctly predicted the shear streb behavior both quantitatively and qualitatively. The shear streb data of the electrorheological fluid showing aligned fibers' structural reformation as a function of the shear rate agreed well with the new model which required fewer parameters than the CCJ (Cho-Choi-Jhon) model. The static yield streb was found to be quadratically dependent on the field strength, in agreement with the predictions of the polarization model. A scaling function was used to model the yield streb behavior of the electrorheological fluid over a range of electric fields, and it correctly predicted the static yield streb behavior both quantitatively and qualitatively. © 2015 AIP Publishing LLC.