| Extensive molecular simulations on a model ferrofluid are performed in order to study magnetoviscous and viscoelastic phenomena in semi-dilute ferrofluids. Simulation results of the nonequilibrium magnetization, shear viscosity and normal stress differences are presented. Rotational and configurational contributions to the shear viscosity are analyzed and their influence on the magnetoviscous effect is discussed. The simplified model of non-interacting magnetic dipoles describes the nonequilibrium magnetization and the rotational viscosity, but does not account for configurational viscosity contributions and normal stress differences. Improved mean-field models that overcome these limitations show good agreement with the simulation results for weak dipolar interactions where the models should apply. Comparisons to simulation results for various interaction strengths allows to determine the range of validity of the mean-field models.
for LaTeX users @article{PIlg2005-71,
author = {P. Ilg and M. Kr\"oger and S. Hess},
title = {Magnetoviscosity of semidilute ferrofluids and the role of dipolar interactions: Comparison of molecular simulation and dynamical mean-field theory},
journal = {Phys. Rev. E},
volume = {71},
pages = {031205},
year = {2005}
}
\bibitem{PIlg2005-71} P. Ilg, M. Kr\"oger, S. Hess,
Magnetoviscosity of semidilute ferrofluids and the role of dipolar interactions: Comparison of molecular simulation and dynamical mean-field theory,
Phys. Rev. E {\bf 71} (2005) 031205 (11 pages).PIlg2005-71
P. Ilg, M. Kr\"oger, S. Hess
Magnetoviscosity of semidilute ferrofluids and the role of dipolar interactions: Comparison of molecular simulation and dynamical mean-field theory
Phys. Rev. E,71,2005,031205 (11 pages) |
mk@mat.ethz.ch
1 out of 810 entries requested
[H-factor to-date: > 0]
