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EXPERIMENTAL INVESTIGATION OF NATURAL CONVECTION HEAT TRANSFER OF Fe3O4/ ETHYLENE GLYCOL NANOFLUID UNDER MAGNETIC FIELD

DOI: 10.1615/ICHMT.2011.TMNN-2011.380
page 8

Navid Naseri Borujeni
Department of Chemical Engineering Isfahan University of Technology

Nasrin Etesami
Department of Chemical Engineering, Isfahan University of Technology

Mohsen Nasr Esfahany
Department of Chemical Engineering, Isfahan University of Technology

Resumo

In this work natural convection heat transfer of Fe3O4/Ethylene Glycol nanofluid around a horizontal heated wire in the presence of vertical magnetic field is studied experimentally. The effects of the external magnetic field strength and its orientation on natural convection heat transfer of the magnetic nanofluid are analyzed. The experimental results show that the external magnetic field is a vital factor that affects the convective heat transfer performances of the magnetic fluids. The results show that the natural convection coefficient of magnetic fluid under magnetic field increases with volume concentration of nanoparticle up to 0.015%. The natural convection coefficient decreases with increasing in strength of magnetic field in both directions.

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