2001/02/04 by Y. L. Siu, Yuet-Lun Siu, Jones T. K. Wan +1
Engineering · Physics and Astronomy · #Seismic Performance and Analysis #Vibration Control and Rheological Fluids #cond-mat.soft #physics.comp-ph #physics.flu-dyn
paper · pdf · doi:10.1016/s0010-4655(01)00386-1
published as Comput. Phys. Comm. 142, 446 (2001) · Presented at Conference on Computational Physics (CCP2000), held at Gold Coast, Australia from 3-8, December 2000
arxiv created 2001/02/04 · openalex publication_date 2001/12/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We have developed a multiple image method to compute the interparticle force for a polydisperse electrorheological (ER) fluid. We apply the formalism to a pair of dielectric spheres of different dielectric constants and calculate the force as a function of the separation. The results show that the point-dipole (PD) approximation errs considerably because many-body and multipolar interactions are ignored. The PD approximation becomes even worse when the dielectric contrast between the particles and the host medium is large. From the results, we show that the dipole-induced-dipole (DID) model yields very good agreements with the multiple image results for a wide range of dielectric contrasts and polydispersity. The DID model accounts for multipolar interaction partially and is simple to use in computer simulation of polydisperse ER fluids.