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Main Title: Nonequilibrium Dynamics and Magnetoviscosity of Moderately Concentrated Magnetic Liquids: A dynamic Mean-field Study
Author(s): Ilg, Patrick
Hess, Siegfried
Type: Article
Language Code: en
Abstract: A mean-field Fokker-Planck equation approach to the dynamics of ferrofluids in the presence of a magnetic field and velocity gradients is proposed that incorporates magnetic dipole-dipole interactions of the colloidal particles. The model allows to study the combined effect of a magnetic field and dipolar interactions on the viscosity of the ferrofluid. It is found that dipolar interactions lead to additional non-Newtonian contributions to the stress tensor, which modify the behavior of the non-interacting system. The predictions of the present model are in qualitative agreement with experimental results, such as the enhancement as well as the different anisotropy of the magnetoviscous effect and the dependence on the symmetric velocity gradient.
Issue Date: 2003
Date Available: 2-Oct-2018
DDC Class: 530 Physik
Subject(s): hydrodynamics
magnetic liquids
rotational flow
Sponsor/Funder: DFG, SPP 1104, Kolloidale magnetische Flüssigkeiten: Grundlagen, Entwicklung und Anwendung neuartiger Ferrofluide
Journal Title: Zeitschrift für Naturforschung A
Publisher: De Gruyter
Publisher Place: Berlin
Volume: 58
Issue: 11
Publisher DOI: 10.1515/zna-2003-1101
Page Start: 589
Page End: 600
EISSN: 1865-7109
ISSN: 0932-0784
Appears in Collections:Inst. Theoretische Physik » Publications

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