Rheological properties of magnetic suspensions

Abstract

We present results of a theoretical study of the magnetorheological viscosity η of a suspension versus the applied magnetic field H and shear rate . It is supposed that the macroscopic rheological effects are provided by linear chain-like aggregates. Unlike in traditional models, the natural statistical distribution of the chains over the number of particles in them is taken into account. The results obtained explain important features of the rheological η versus law, which has been detected in experiments but qualitatively contradicts known theories of rheological properties of magnetic suspensions. © 2008 IOP Publishing Ltd.