The origin of interparticle potential of electrorheological fluids

D. Boda, M. Valiskó, I. Szalai

Research output: Contribution to journalArticle


The particles of electrorheological fluids can be modelled as dielectric spheres (DS) immersed in a continuum dielectric.When an external field is applied, polarization charges are induced on the surfaces of the spheres and can be represented as point dipoles placed in the centres of the spheres. When the DSs are close to each other, the induced charge distributions are distorted by the electric field of the neighbouring DSs. This is the origin of the interaction potential between the DSs. The calculation of this energy is very time consuming, therefore, the DS model cannot be used in molecular simulations. In this paper, we show that the interaction between the point dipoles appropriately approximates the interaction of DSs. The polarizable point dipole model provides better results, but this model is not pair-wise additive, so it is not that practical in particle simulations.

Original languageEnglish
Article number43002
JournalCondensed Matter Physics
Issue number4
Publication statusPublished - Dec 30 2013


  • Electrorheological fluids
  • Interparticle potential
  • Simulation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)

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