Journal ArticleDOI
Utilization of the magnetogranulometric analysis to estimate the thermal conductivity of magnetic fluids
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TLDR
In this article, a semi-empirical equation for the effective thermal conductivity of the Holotescu-Stoian model was applied to a set of four dilutions of a transformer oil based magnetic fluid with magnetite nanoparticles as magnetic phase, followed by a comparison with the measured values of the hot ball method.About:
This article is published in Journal of Magnetism and Magnetic Materials.The article was published on 2011-05-01. It has received 9 citations till now. The article focuses on the topics: Thermal conductivity.read more
Citations
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Journal ArticleDOI
Heat transfer enhancement by magnetic nanofluids—A review
Innocent Nkurikiyimfura,Innocent Nkurikiyimfura,Yanmin Wang,Yanmin Wang,Zhidong Pan,Zhidong Pan +5 more
TL;DR: Magnetic nanofluids (MNFs) constitute a special class of materials that exhibit both magnetic and fluid properties as discussed by the authors, and the interest in the use of MNFs as a heat transfer medium stem from a possibility of controlling its flow and heat transfer process via an external magnetic field.
Journal ArticleDOI
Transformer oil-based magnetic nanofluid with high dielectric losses tested for cooling of a model transformer
Michal Rajnak,Milan Timko,Peter Kopcansky,K. Paulovičová,Jozef Kuchta,Marek Franko,Juraj Kurimsky,Bystrík Dolník,Roman Cimbala +8 more
TL;DR: In this paper, an experimental study of dielectric permittivity and dissipation factor of transformer oil-based magnetic nanofluid is reported, which consists of a commercial transformer oil and iron oxide nanoparticles coated with oleic acid as a stabilizing agent.
Journal ArticleDOI
Controlled assembly and alignment of CNTs in ferrofluid: Application in tunable heat transfer
TL;DR: In this paper, a water-based nanofluid of Fe3O4/MWNTs was studied and its thermal conductivity was measured for the situations in which temperature gradient and magnetic field were either parallel or perpendicular.
Book ChapterDOI
Nanofluid with Colloidal Magnetic Fe3O4 Nanoparticles and Its Applications in Electrical Engineering
TL;DR: In this article, a new type of cooling agent based on magnetic nanofluid was proposed for replacing the classical cooling fluids in electrical power transformers, where magnetite (Fe3O4) nanoparticles were synthesized by the co-precipitation method from an aqueous medium of salts FeCl3x6H 2O and FeSO4x7H2O in the molar ratio Fe /Fe = 2:1.
Journal ArticleDOI
Magnetodielectric Properties of Transformer Oil Based Magnetic Fluids
Milan Timko,Peter Kopcansky,Matus Molcan,L. Tomčo,K. Marton,S. Molokac,P. Rybar,Floriana D. Stoian,Sorin Holotescu,Alina Taculescu +9 more
TL;DR: This paper presents a meta-analyses of Magnetic Fluids of Kosice using a high-resolution 3D image format and shows the structure of the molecule as well as its transition state under various experimental conditions.
References
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Book
A Treatise on Electricity and Magnetism
TL;DR: The most influential nineteenth-century scientist for twentieth-century physics, James Clerk Maxwell (1831-1879) demonstrated that electricity, magnetism and light are all manifestations of the same phenomenon: the electromagnetic field as discussed by the authors.
Journal ArticleDOI
Measurements of particle size distribution parameters in ferrofluids
TL;DR: In this article, a method is presented by means of which (for a ferrofluid with a lognormal distribution of particle size) it is possible to determine the standard deviation and median particle diameter (D v ) from the room temperature magnetisation curve.
Book
Nanofluids : science and technology
TL;DR: Theoretical modeling of thermal conductivity of nanofluids has been studied in this article, where the authors present a theoretical model for thermal conductivities of nano-fluids.
Magnetic Fluids and Applications Handbook
V. Bashtovoy,B. M. Berkovsky +1 more
TL;DR: The concepts and basic principles of magnetic fluids have been explained in a simple manner, but the significance fully described; and sufficient examples are presented in regard to the use of the theory in practical situations.
Journal ArticleDOI
Magnetic properties of polydisperse ferrofluids: a critical comparison between experiment, theory, and computer simulation.
Alexey O. Ivanov,Sofia S. Kantorovich,Evgeniy N. Reznikov,Christian Holm,A.F. Pshenichnikov,A.V. Lebedev,Alexandros Chremos,Philip J. Camp +7 more
TL;DR: It is shown that the majority of available theories yield results that depend strongly on the ferrofluid concentration, even though the magnetic composition should be fixed, while the second-order modified mean-field (MMF2) theory provides excellent predictions for the initial susceptibility measured in simulations.
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F. Walter Jones,Florica Pascal +1 more