Kurtoğlu, Evrim and Kaya, Alihan and Gözüaçık, Devrim and Acar, Funda Yağcı and Koşar, Ali (2014) Experimental study on convective heat transfer performance of iron oxide based ferrofluids in microtubes. Journal of Thermal Science and Engineering Applications, 6 (3). ISSN 1948-5085 (Print) 1948-5093 (Online)
This is the latest version of this item.
Official URL: http://dx.doi.org/10.1115/1.4026490
Abstract
Ferrofluids are colloidal suspensions, in which the solid phase material is composed of magnetic nanoparticles, while the base fluid can potentially be any fluid. The solid particles are held in suspension by weak intermolecular forces and may be made of materials with different magnetic properties. Magnetite is one of the materials used for its natural ferromagnetic properties. Heat transfer performance of ferrofluids should be carefully analyzed and considered for their potential of their use in wide range of applications. In this study, convective heat transfer experiments were conducted in order to characterize convective heat transfer enhancements with Lauric acid coated ironoxide (Fe3O4) nanoparticle based ferrofluids, which have volumetric fractions varying from 0% to ~5% and average particle diameter of 25 nm, in a hypodermic stainless steel microtube with an inner diameter of 514 Hm, an outer diameter of 819 Hm, and a heated length of 2.5 cm. Heat fluxes up to 184 W/cm2 were applied to the system at three different flow rates (1ml/s, 0.62ml/s and 0.36 ml/s). A decrease of around 100% in the maximum surface temperature (measured at the exit of the microtube) with the ferrofluid compared to the pure base fluid at significant heat fluxes (>100 W/cm2) was observed. Moreover, the enhancement in heat transfer increased with nanoparticle concentration, and there was no clue for saturation in heat transfer coefficient profiles with increasing volume fraction over the volume fraction range in this study (0%-5%). The promising results obtained from the experiments suggest that the use of ferrofluids for heat transfer, drug delivery, and biological applications can be advantageous and a viable alternative as new generation coolants and futuristic drug carriers.
Item Type: | Article |
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Additional Information: | Article number: 034501 |
Subjects: | T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery Q Science > QD Chemistry Q Science > QC Physics |
Divisions: | Faculty of Engineering and Natural Sciences > Academic programs > Biological Sciences & Bio Eng. Faculty of Engineering and Natural Sciences > Academic programs > Mechatronics Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng. Faculty of Engineering and Natural Sciences |
Depositing User: | Ali Koşar |
Date Deposited: | 18 Jun 2014 10:55 |
Last Modified: | 02 Aug 2019 10:02 |
URI: | https://research.sabanciuniv.edu/id/eprint/24067 |
Available Versions of this Item
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Experimental study on heat transfer performance of iron oxide based ferrofluids to be used as new generation coolants and drug delivery agents. (deposited 30 Nov 2012 21:17)
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Experimental study on heat transfer performance of iron oxide based ferrofluids to be used as new generation coolants and drug delivery agents. (deposited 14 Jan 2014 16:18)
- Experimental study on convective heat transfer performance of iron oxide based ferrofluids in microtubes. (deposited 18 Jun 2014 10:55) [Currently Displayed]
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Experimental study on heat transfer performance of iron oxide based ferrofluids to be used as new generation coolants and drug delivery agents. (deposited 14 Jan 2014 16:18)