Experimental Investigation of Natural Convection Heat Transfer through Rectangular Enclosure Filled with TiO2-Water Nanofluid.
Abou Elenein, A., Sultan, A., Mostafa, H., Hegazi, A. (2020). Experimental Investigation of Natural Convection Heat Transfer through Rectangular Enclosure Filled with TiO2-Water Nanofluid.. EKB Journal Management System, 39(1), 39-48. doi: 10.21608/bfemu.2020.103097
Amro Abou Elenein; Ahmed A. Sultan; Hesham M. Mostafa; Ahmed Hegazi. "Experimental Investigation of Natural Convection Heat Transfer through Rectangular Enclosure Filled with TiO2-Water Nanofluid.". EKB Journal Management System, 39, 1, 2020, 39-48. doi: 10.21608/bfemu.2020.103097
Abou Elenein, A., Sultan, A., Mostafa, H., Hegazi, A. (2020). 'Experimental Investigation of Natural Convection Heat Transfer through Rectangular Enclosure Filled with TiO2-Water Nanofluid.', EKB Journal Management System, 39(1), pp. 39-48. doi: 10.21608/bfemu.2020.103097
Abou Elenein, A., Sultan, A., Mostafa, H., Hegazi, A. Experimental Investigation of Natural Convection Heat Transfer through Rectangular Enclosure Filled with TiO2-Water Nanofluid.. EKB Journal Management System, 2020; 39(1): 39-48. doi: 10.21608/bfemu.2020.103097

Experimental Investigation of Natural Convection Heat Transfer through Rectangular Enclosure Filled with TiO2-Water Nanofluid.

MEJ- Mansoura Engineering Journal
Article 6, Volume 39, Issue 1, March 2014, Page 39-48  XML PDF (1.08 MB)
Document Type: Research Studies
DOI: 10.21608/bfemu.2020.103097
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Authors
Amro Abou Elenein* 1; Ahmed A. Sultan2; Hesham M. Mostafa3; Ahmed Hegazi4
1Researcher at Mechanical Power Engineering Department., Faculty of Engineering., Mansoura.
2Professor of Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.
3Mechanical Power Engineering Department., Higher Technological Institute., Tenth of Ramadan City., Egypt.
4Associate Professor., Mechanical Engineering Department., El-Mansoura University., CO 35516., Egypt.
Abstract
Experimental investigations on natural convection heat transfer have been carried out inside rectangular enclosures filled with TiO2- water nanofluid. Two enclosures are used with two different aspect ratios of 1 and 2 and the modified Rayleigh number based on the enclosure height in the range . The bottom surface of the enclosure is heated using a constant heat flux in the range from 40 to 6600 W/m2 while the upper surface is cooled by forced air stream, and side walls are insulated. The heat transfer rate for aspect ratio, AR=2, is higher than that for the aspect ratio A= 1. The average temperature of hot surface decreases with the increase of   nanoparticles volume concentration, , up to minimum values at   =0.8 % and then increases with further increase in . The average hot surface temperature increases with the increase in the modified Rayleigh number. The heat transfer rate increases with the increase of   the modified Rayleigh number up to maximum values of about and then decreases with further increase in . The highest value of the average Nusselt number is located at = 0.8%. A general correlation is obtained for calculating the average heat transfer rate as a function of modified Rayleigh number and nanoparticles volume concentration.
Keywords
Heat transfer; Rectangular enclosure; Experimental analyses; TiO2– water nanofluid
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