(255j) Dynamic Simulations and Rheological Studies of Suspensions of Magnetic Particles

The rheological properties of magnetorheological (MR) fluids can vary significantly when they are subject to external magnetic fields. The coarsening of magnetic particles can generate complicated microstructures that render enhanced rheological properties. To model the dynamics and to predict the rheological properties under different external fields, an accurate description of both the hydrodynamic interactions and the magnetic interactions is required. In this study, Stokesian dynamics is utilized to calculate the hydrodynamic interactions, while the magnetic interactions are calculated in an analogous form by splitting the interactions into a far-field many-body part and a near-field two-body part. To obtain the rheological properties in an infinite system, both interactions are calculated by using the particle-mesh-Ewald (PME) method to accelerate the computation of large-scale systems.