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Abstract
The results of free convection heat transfer investigation from a horizontal, uniformly heated tube immersed in a nanofluid are presented. Experiments were performed with five base fluids, i.e., ethylene glycol (EG), distilled water (W) and the mixtures of EG and water with the ratios of 60/40, 50/50, 40/60 by volume, so the Rayleigh (Ra) number range was 3 104 Ra 1.3 106 and the Prandtl (Pr) number varied from 4.4 to 176. Alumina (Al2O3) nanoparticles were tested at the mass concentrations of 0.01, 0.1 and 1%. Enhancement as well as deterioration of heat transfer performance compared to the base fluids were detected depending on the composition of the nanofluid. Based on the experimental results obtained, a correlation equation that describes the dependence of the average Nusselt (Nu) number on the Ra number, Pr number and concentration of nanoparticles is proposed.
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Authors (3)
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Dorota Sawicka mgr
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Slawomir Smolen
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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ENERGIES
no. 14,
ISSN: 1996-1073 - Language:
- English
- Publication year:
- 2021
- Bibliographic description:
- Sawicka D., Cieśliński J., Smolen S.: Experimental Investigation of Free Convection Heat Transfer from Horizontal Cylinder to Nanofluids// ENERGIES -Vol. 14,iss. 10 (2021), s.2909-
- DOI:
- Digital Object Identifier (open in new tab) 10.3390/en14102909
- Verified by:
- Gdańsk University of Technology
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