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Viscous properties and structure of ferro-fluids and magneto-rheological fluids. Non-equilibrium molecular dynamics (NEMD) studies of simple model systems.
S. Hess1 - T. Weider1 - M. Kröger1,2
1 Institut f. Theoretische Physik, TU Berlin, Hardenbergstr. 36, 10623 Berlin, Germany }
2 Polymerphysik, Institut f. Polymere, ETH Zürich, Sonneggstr. 3, 8092 Zürich, Schweiz
Abstract
A simple model is introduced for the theoretical treatment of ferro-fluids and magneto-rheological (MR) fluids. Results from analytic calculations and from non-equilibrium molecular dynamics (NEMD)computer simulations are presented for the anisotropy of the viscosity and for shear--induced structural changes in fluids containing particles with perfectly oriented magnetic moments. Furthermore, the rheological behavior of fluids containing chains of particles is discussed. Tables 1, Figs 4, Refs 41.