Localization of Electromagnetic Force Based on Material Models

Various candidates are known for electromagnetic stress in material media that all coincide in free space with the Maxwell's stress tensor. Although the situation provides various total force computation methods it leaves ambiguous the concept of electromagnetic force density. Instead of consid...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2012-01, Vol.48 (1), p.13-17
Main Authors: Kovanen, Tuomas, Tarhasaari, Timo, Kettunen, Lauri
Format: Article
Language:English
Subjects:
Computation
Computational modeling
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Cross-disciplinary physics: materials science
rheology
Density
Dipole models
Electromagnetic forces
Exact sciences and technology
Force
force density
Localization
Magnetic fields
Magnetic resonance imaging
Magnetic separation
Magnetism
Magnetization
Materials
Materials science
Mathematical models
Other topics in materials science
Physics
Position (location)
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Description
Summary:Various candidates are known for electromagnetic stress in material media that all coincide in free space with the Maxwell's stress tensor. Although the situation provides various total force computation methods it leaves ambiguous the concept of electromagnetic force density. Instead of considering electromagnetic force per unit of volume we restrict the localization to subvolumes of material bodies. This way classical dipole models for the basic material elements yields uniquely defined local electromagnetic force. The approach is demonstrated by computing the magnetic force on a ferromagnetic body in contact with a permanent magnet.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2011.2164260