Ilg Patrick, Kröger Martin, Hess Siegfried
Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2005 May;71(5 Pt 1):051201. doi: 10.1103/PhysRevE.71.051201. Epub 2005 May 26.
The anisotropy of the magnetoviscous effect in ferrofluids subjected to weak planar Couette flow is investigated by extensive molecular simulations. The field and concentration dependence of the viscosity coefficients are found to depend on the relative orientation of the magnetic field with respect to the flow geometry. Comparison with dynamical mean-field models shows satisfactory agreement for moderate interaction strengths. In the semidilute regime it is found that the anisotropy contains valuable information on particle interaction.