Dynamic dielectric response of electrorheological fluids in drag flow

B. Horváth, I. Szalai

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We have determined the response time of dilute electrorheological fluids (ER) in drag flow from the dynamic dielectric response. On the basis of a kinetic rate equation a new formula was derived to approximate the experimental time-dependent dielectric permittivity during the temporal evolution of the microstructure. The dielectric response time was compared to the standard rheological response time extracted from the time-dependent shear stress, and a good agreement was obtained. We found that the dielectric method is more sensitive to detect any transient during the chain formation process. The experimental saturation value of the dielectric permittivity corresponding to the equilibrium microstructure was estimated on the basis of formulas derived from the Clausius-Mossotti equation.

Original languageEnglish
Article number042308
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume92
Issue number4
DOIs
Publication statusPublished - Oct 15 2015

    Fingerprint

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

Cite this