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dc.contributor.authorKúdelčík, Jozef
dc.contributor.authorBury, Peter
dc.contributor.authorDrga, Jozef
dc.contributor.authorKopčanský, Peter
dc.contributor.authorZávišová, Vlasta
dc.contributor.authorTimko, Milan
dc.date.accessioned2013-07-08T10:49:40Z
dc.date.available2013-07-08T10:49:40Z
dc.date.issued2013
dc.identifier.citationAdvances in electrical and electronic engineering. 2013, vol. 11, no. 2, p. 147-155 : ill.cs
dc.identifier.issn1804-3119
dc.identifier.issn1336-1376
dc.identifier.urihttp://hdl.handle.net/10084/100588
dc.description.abstractThe external magnetic field in transformer oil-based magnetic fluids leads to the aggregation of magnetic nanoparticles and formation of clusters. These aggregations are the result of the interaction between the external magnetic field and the magnetic moments of the nanoparticles occurs. However, the temperature of magnetic fluids has also very important influence on the structural changes because the mechanism of thermal motion acts against the cluster creation. The acoustic spectroscopy was used to study the anisotropy of transformer oil-based magnetic fluids upon the effect of an external magnetic field and temperature. In present the anisotropy of the magnetic fluids can be described by two theories. Taketomi theory assumes the existence of spherical clusters. These clusters form long chains, aligned in a magnetic field direction. Shliomis in his theory supposed that only nanoparticles formed chains. A comparison of the experimental results with the predictions of the Taketomi theory allowed a determination of the cluster radius and the number density of the colloidal particles. The proportions of the acoustic wave energy used for excitation of the translational and rotational motion were determined.cs
dc.format.extent777636 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoencs
dc.publisherVysoká škola báňská - Technická univerzita Ostravacs
dc.relation.ispartofseriesAdvances in electrical and electronic engineeringcs
dc.relation.urihttp://advances.utc.sk/index.php/AEEE/article/download/760/857cs
dc.rights© Vysoká škola báňská - Technická univerzita Ostrava
dc.rightsCreative Commons Attribution 3.0 Unported (CC BY 3.0)
dc.subjectacoustic attenuationcs
dc.subjectanisotropycs
dc.subjectclusterscs
dc.subjectmagnetic fluidcs
dc.subjectrotation and translation motioncs
dc.titleComparison of theories of anisotropy in transformer oil-based magnetic fluidscs
dc.typearticlecs
dc.rights.accessopenAccess
dc.type.versionpublishedVersioncs
dc.type.statusPeer-reviewedcs


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    Kolekce určená pro sklízení infrastrukturou OpenAIRE; obsahuje otevřeně přístupné publikace, případně další publikace, které jsou výsledkem projektů rámcových programů Evropské komise (7. RP, H2020).
  • AEEE. 2013, vol. 11 [58]

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