Heat Transfer and Friction Factor of Water and Ethylene Glycol Mixture Based TiO2 and Al2O3 Nanofluids Under Turbulent Flow

It has been a great challenge in heat transfer to provide efficient thermal fluids for cooling purposes especially in engineering practice. The concerns on various operating temperatures become the main concern in the present study to investigate the heat transfer and friction factor of titanium oxi...

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Main Authors:	Azmi, W. H., Khamisah, Abdul Hamid, Usri, N. A., R., Mamat, Mohd Sham, Mohamad
Format:	Article
Language:	English
Published:	Elsevier 2016
Subjects:	Q Science (General) TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/13299/ http://umpir.ump.edu.my/id/eprint/13299/ http://umpir.ump.edu.my/id/eprint/13299/ http://umpir.ump.edu.my/id/eprint/13299/1/Heat%20transfer%20and%20friction%20factor%20of%20water%20and%20ethylene%20glycol%20mixture%20based%20TiO2%20and%20Al2O3%20nanofluids%20under%20turbulent%20flow.pdf

id	ump-13299
recordtype	eprints
spelling	ump-132992019-10-17T08:07:03Z http://umpir.ump.edu.my/id/eprint/13299/ Heat Transfer and Friction Factor of Water and Ethylene Glycol Mixture Based TiO2 and Al2O3 Nanofluids Under Turbulent Flow Azmi, W. H. Khamisah, Abdul Hamid Usri, N. A. R., Mamat Mohd Sham, Mohamad Q Science (General) TJ Mechanical engineering and machinery It has been a great challenge in heat transfer to provide efficient thermal fluids for cooling purposes especially in engineering practice. The concerns on various operating temperatures become the main concern in the present study to investigate the heat transfer and friction factor of titanium oxide (TiO2) and aluminium oxide (Al2O3) under turbulent flow in a tube. The nanofluids were prepared using the two-step method and dilution process for volume concentrations of 0.5% to 1.0% in a mixture of water (W) and ethylene glycol (EG) at a volume ratio of 60:40 (W:EG). The convective heat transfer investigations were conducted at a constant heat flux boundary condition and operating temperatures of 30, 50 and 70 °C. The enhancement of thermal conductivity and viscosity of Al2O3 was found to be influenced by the temperature while the enhancement of the TiO2 nanofluid properties was observed to be independent of temperature. Both Al2O3 and TiO2 nanofluids were observed to have almost the same values of heat transfer coefficients for 1.0% concentration at 50 and 70 °C with an average enhancement of 24%. However, the heat transfer coefficients of Al2O3 nanofluids were found to be higher than TiO2 nanofluids at the operating temperature of 30 °C. The heat transfer concentrations increased with volume concentration and observed for both types of nanofluids at all operating temperatures. The friction factors for both TiO2 and Al2O3 nanofluids slightly increased with volume concentration. Elsevier 2016 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/13299/1/Heat%20transfer%20and%20friction%20factor%20of%20water%20and%20ethylene%20glycol%20mixture%20based%20TiO2%20and%20Al2O3%20nanofluids%20under%20turbulent%20flow.pdf Azmi, W. H. and Khamisah, Abdul Hamid and Usri, N. A. and R., Mamat and Mohd Sham, Mohamad (2016) Heat Transfer and Friction Factor of Water and Ethylene Glycol Mixture Based TiO2 and Al2O3 Nanofluids Under Turbulent Flow. International Communications in Heat and Mass Transfer, 76. pp. 24-32. ISSN 0735-1933 http://dx.doi.org/10.1016/j.icheatmasstransfer.2016.05.010 DOI: 10.1016/j.icheatmasstransfer.2016.05.010
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	Q Science (General) TJ Mechanical engineering and machinery
spellingShingle	Q Science (General) TJ Mechanical engineering and machinery Azmi, W. H. Khamisah, Abdul Hamid Usri, N. A. R., Mamat Mohd Sham, Mohamad Heat Transfer and Friction Factor of Water and Ethylene Glycol Mixture Based TiO2 and Al2O3 Nanofluids Under Turbulent Flow
description	It has been a great challenge in heat transfer to provide efficient thermal fluids for cooling purposes especially in engineering practice. The concerns on various operating temperatures become the main concern in the present study to investigate the heat transfer and friction factor of titanium oxide (TiO2) and aluminium oxide (Al2O3) under turbulent flow in a tube. The nanofluids were prepared using the two-step method and dilution process for volume concentrations of 0.5% to 1.0% in a mixture of water (W) and ethylene glycol (EG) at a volume ratio of 60:40 (W:EG). The convective heat transfer investigations were conducted at a constant heat flux boundary condition and operating temperatures of 30, 50 and 70 °C. The enhancement of thermal conductivity and viscosity of Al2O3 was found to be influenced by the temperature while the enhancement of the TiO2 nanofluid properties was observed to be independent of temperature. Both Al2O3 and TiO2 nanofluids were observed to have almost the same values of heat transfer coefficients for 1.0% concentration at 50 and 70 °C with an average enhancement of 24%. However, the heat transfer coefficients of Al2O3 nanofluids were found to be higher than TiO2 nanofluids at the operating temperature of 30 °C. The heat transfer concentrations increased with volume concentration and observed for both types of nanofluids at all operating temperatures. The friction factors for both TiO2 and Al2O3 nanofluids slightly increased with volume concentration.
format	Article
author	Azmi, W. H. Khamisah, Abdul Hamid Usri, N. A. R., Mamat Mohd Sham, Mohamad
author_facet	Azmi, W. H. Khamisah, Abdul Hamid Usri, N. A. R., Mamat Mohd Sham, Mohamad
author_sort	Azmi, W. H.
title	Heat Transfer and Friction Factor of Water and Ethylene Glycol Mixture Based TiO2 and Al2O3 Nanofluids Under Turbulent Flow
title_short	Heat Transfer and Friction Factor of Water and Ethylene Glycol Mixture Based TiO2 and Al2O3 Nanofluids Under Turbulent Flow
title_full	Heat Transfer and Friction Factor of Water and Ethylene Glycol Mixture Based TiO2 and Al2O3 Nanofluids Under Turbulent Flow
title_fullStr	Heat Transfer and Friction Factor of Water and Ethylene Glycol Mixture Based TiO2 and Al2O3 Nanofluids Under Turbulent Flow
title_full_unstemmed	Heat Transfer and Friction Factor of Water and Ethylene Glycol Mixture Based TiO2 and Al2O3 Nanofluids Under Turbulent Flow
title_sort	heat transfer and friction factor of water and ethylene glycol mixture based tio2 and al2o3 nanofluids under turbulent flow
publisher	Elsevier
publishDate	2016
url	http://umpir.ump.edu.my/id/eprint/13299/ http://umpir.ump.edu.my/id/eprint/13299/ http://umpir.ump.edu.my/id/eprint/13299/ http://umpir.ump.edu.my/id/eprint/13299/1/Heat%20transfer%20and%20friction%20factor%20of%20water%20and%20ethylene%20glycol%20mixture%20based%20TiO2%20and%20Al2O3%20nanofluids%20under%20turbulent%20flow.pdf
first_indexed	2023-09-18T22:15:46Z
last_indexed	2023-09-18T22:15:46Z
_version_	1777415326388977664

Heat Transfer and Friction Factor of Water and Ethylene Glycol Mixture Based TiO2 and Al2O3 Nanofluids Under Turbulent Flow

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