Numerical modelling of magnetic shielding by a cylindrical ferrofluid layer

A coupled method of finite differences and boundary elements is applied to solve a nonlinear transmission problem of magnetostatics. The problem describes an interaction of a uniform magnetic field with a cylindrical ferrofluid layer. Ferrofluid magnetisations, based on expansions over the Langevin...

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Bibliographic Details
Published inMathematical modelling and analysis Vol. 24; no. 2; pp. 155 - 170
Main Authors Lavrova, Olga, Polevikov, Viktor, Polevikov, Sergei
Format Journal Article
LanguageEnglish
Published Vilnius Vilnius Gediminas Technical University 05.02.2019
Subjects
boundary element method
Composite materials
Electromagnetic fields
Electromagnetism
Electrons
Ferroalloys
Ferrofluids
finite difference method
Magnetic fields
magnetic fluid
Magnetic shielding
Magnetism
Magnetostatics
Mathematical models
Observations
Properties
shielding
Thickness
transmission magnetostatics problem
magnetic fluid
shielding
boundary element method
finite difference method
transmission magnetostatics problem
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ISSN1392-6292
1648-3510
DOI10.3846/mma.2019.011

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Summary:A coupled method of finite differences and boundary elements is applied to solve a nonlinear transmission problem of magnetostatics. The problem describes an interaction of a uniform magnetic field with a cylindrical ferrofluid layer. Ferrofluid magnetisations, based on expansions over the Langevin law, are considered to model ferrofluids with a different concentration of ferroparticles. The shielding effectiveness factor of the cylindrical thick-walled ferrofluid layer is calculated depending on intensities of the uniform magnetic field and on thickness of the ferrofluid layer.
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ISSN:1392-6292
1648-3510
DOI:10.3846/mma.2019.011