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Title:Analiza vpliva magnetnega polja na viskoznost in grelno moč magnetne tekočine : magistrsko delo
Authors:ID Vizjak, Jakob (Author)
ID Beković, Miloš (Mentor) More about this mentor... New window
ID Hamler, Anton (Comentor)
ID Kurečič, Manja (Comentor)
Files:.pdf MAG_Vizjak_Jakob_2019.pdf (4,32 MB)
MD5: E31DA7F3DF5520D13A1261C2FDF918AE
PID: 20.500.12556/dkum/a868f7c4-66b5-46d4-b7d0-ab6ffd33f5c0
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FERI - Faculty of Electrical Engineering and Computer Science
Abstract:Magnetne tekočine sodijo v kategorijo nanomaterialov zaradi velikostnega razreda suspendiranih magnetnih nanodelcev v nosilni tekočini. Njihova uporabnost se kaže na različnih področjih inženiringa, znanosti in medicine. Ena izmed pomembnejših lastnosti magnetne tekočine je viskoznost, ki je bila predmet opazovanja v magistrski nalogi. Vpliv viskoznosti smo preverili teoretično kot tudi eksperimentalno. V teoretičnem delu smo uporabili in prilagodili matematični model izračuna izgub magnetne tekočine v visokofrekvenčnem magnetnem polju ter raziskali vpliv različnih modelov viskoznosti suspenzije in različnih nosilnih tekočin. Za validacijo matematičnega modela izgub smo na izbranem vzorcu opravili serijo meritev izgub po kalorimetrični metodi, pri kateri se glede na temperaturni odziv merjenca ugotovi specifična stopnja absorpcije (SAR). V eksperimentalnem delu naloge smo opravili meritve viskoznosti možnih nosilnih tekočin po dveh različnih metodah, in sicer najprej s Hoepplerjevim in nato z rotacijskim viskozimetrom. V sklopu meritev z rotacijskim viskozimetrom smo sistematično skušali ugotoviti temperaturno odvisnost in dokazati pojav magnetoreologije.
Keywords:magnetne tekočine, specifična absorpcijska stopnja, viskoznost, magnetne izgube, magnetno polje
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[J. Vizjak]
Year of publishing:2019
Number of pages:XII, 71 str.
PID:20.500.12556/DKUM-74430 New window
UDC:621.313.5:537.633(043.2)
COBISS.SI-ID:22875670 New window
NUK URN:URN:SI:UM:DK:GVLFKUSH
Publication date in DKUM:22.11.2019
Views:1470
Downloads:148
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FERI
:
VIZJAK, Jakob, 2019, Analiza vpliva magnetnega polja na viskoznost in grelno moč magnetne tekočine : magistrsko delo [online]. Master’s thesis. Maribor : J. Vizjak. [Accessed 22 January 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=74430
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:27.08.2019

Secondary language

Language:English
Title:Analysis of the magnetic field impact on the viscosity and heating power of the magnetic fluid
Abstract:Magnetic fluids fall into a category of nanomaterials due to the size of magnetic nanoparticles suspended in the carrier fluid. They are used in various areas of engineering, science, and medicine. One of the most important properties of a magnetic fluid is its viscosity which was observed in this master thesis. Effects of viscosity on magnetic losses were tested both theoretically and experimentally. In the theoretical part, we used and adjusted a mathematical model for the calculation of magnetic fluid losses in a high-frequency magnetic field and studied the influence of different models of suspension viscosity and different carrier fluids. In order to validate the mathematical model, a series of measurements was performed on the sample, using the calorimetric method, which, based on the temperature response of the sample, determines the specific absorption rate (SAR). In the experimental part, we carried out viscosity measurements of different carrier fluids by two methods, first using a Hoeppler and then a rotational viscometer. As a part of the rotational viscometer measurements, we systematically tried to determine the temperature dependence and prove the phenomenon known as magnetoreology.
Keywords:magnetic fluids, specific absorption rate, viscosity, magnetic losses, magnetic field


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