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Heat transfer enhancement for combined convection flow of nanofluids in a vertical rectangular duct considering radiation effects

In this paper, combined convective heat transfer and nanofluids flow characteristics in a vertical rectangular duct are numerically investigated. This investigation covers Rayleigh numbers in the range of 2 × 106 ≤ Ra ≤ 2 × 107 and Reynolds numbers in the range of 200 ≤ Re ≤ 1000. Pure water and fiv...

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Main Authors: Mohammed, H.A., Om, N.I., Shuaib, N.H., Saidur, Rahman
格式: Article
出版: Heat Transfer - Asian Research 2011
主题:
TA Engineering (General). Civil engineering (General)
TJ Mechanical engineering and machinery
在线阅读:http://eprints.um.edu.my/6689/
http://www.scopus.com/inward/record.url?eid=2-s2.0-79959269326&partnerID=40&md5=0e4140adb80081ca4b7f7576f9deebae
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spelling my.um.eprints.66892019-10-25T06:17:25Z http://eprints.um.edu.my/6689/ Heat transfer enhancement for combined convection flow of nanofluids in a vertical rectangular duct considering radiation effects Mohammed, H.A. Om, N.I. Shuaib, N.H. Saidur, Rahman TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery In this paper, combined convective heat transfer and nanofluids flow characteristics in a vertical rectangular duct are numerically investigated. This investigation covers Rayleigh numbers in the range of 2 × 106 ≤ Ra ≤ 2 × 107 and Reynolds numbers in the range of 200 ≤ Re ≤ 1000. Pure water and five different types of nanofluids such as Ag, Au, CuO, diamond, and SiO2 with a volume fraction range of 0.5% ≤ φ ≤ 3% are used. The three-dimensional steady, laminar flow, and heat transfer governing equations are solved using finite volume method (FVM). The effects of Rayleigh number, Reynolds number, nanofluids type, nanoparticle volume fraction of nano- fluids, and effect of radiation on the thermal and flow fields are examined. It is found that the heat transfer is enhanced using nanofluids by 47% when compared with water. The Nusselt number increases as the Reynolds number and Rayleigh number increase and aspect ratio decreases. A SiO2 nanofluid has the highest Nusselt number and highest wall shear stress while the Au nanofluid has the lowest Nusselt number and lowest wall shear stress. The results also revealed that the wall shear stress increases as Reynolds number increases, aspect ratio decreases, and nanoparticle volume fraction increases. Heat Transfer - Asian Research 2011 Article PeerReviewed Mohammed, H.A. and Om, N.I. and Shuaib, N.H. and Saidur, Rahman (2011) Heat transfer enhancement for combined convection flow of nanofluids in a vertical rectangular duct considering radiation effects. Heat Transfer - Asian Research, 40 (5). pp. 448-463. ISSN 10992871 http://www.scopus.com/inward/record.url?eid=2-s2.0-79959269326&partnerID=40&md5=0e4140adb80081ca4b7f7576f9deebae 10.1002/htj.20354
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic TA Engineering (General). Civil engineering (General)
TJ Mechanical engineering and machinery
spellingShingle TA Engineering (General). Civil engineering (General)
TJ Mechanical engineering and machinery
Mohammed, H.A.
Om, N.I.
Shuaib, N.H.
Saidur, Rahman
Heat transfer enhancement for combined convection flow of nanofluids in a vertical rectangular duct considering radiation effects
description In this paper, combined convective heat transfer and nanofluids flow characteristics in a vertical rectangular duct are numerically investigated. This investigation covers Rayleigh numbers in the range of 2 × 106 ≤ Ra ≤ 2 × 107 and Reynolds numbers in the range of 200 ≤ Re ≤ 1000. Pure water and five different types of nanofluids such as Ag, Au, CuO, diamond, and SiO2 with a volume fraction range of 0.5% ≤ φ ≤ 3% are used. The three-dimensional steady, laminar flow, and heat transfer governing equations are solved using finite volume method (FVM). The effects of Rayleigh number, Reynolds number, nanofluids type, nanoparticle volume fraction of nano- fluids, and effect of radiation on the thermal and flow fields are examined. It is found that the heat transfer is enhanced using nanofluids by 47% when compared with water. The Nusselt number increases as the Reynolds number and Rayleigh number increase and aspect ratio decreases. A SiO2 nanofluid has the highest Nusselt number and highest wall shear stress while the Au nanofluid has the lowest Nusselt number and lowest wall shear stress. The results also revealed that the wall shear stress increases as Reynolds number increases, aspect ratio decreases, and nanoparticle volume fraction increases.
format Article
author Mohammed, H.A.
Om, N.I.
Shuaib, N.H.
Saidur, Rahman
author_facet Mohammed, H.A.
Om, N.I.
Shuaib, N.H.
Saidur, Rahman
author_sort Mohammed, H.A.
title Heat transfer enhancement for combined convection flow of nanofluids in a vertical rectangular duct considering radiation effects
title_short Heat transfer enhancement for combined convection flow of nanofluids in a vertical rectangular duct considering radiation effects
title_full Heat transfer enhancement for combined convection flow of nanofluids in a vertical rectangular duct considering radiation effects
title_fullStr Heat transfer enhancement for combined convection flow of nanofluids in a vertical rectangular duct considering radiation effects
title_full_unstemmed Heat transfer enhancement for combined convection flow of nanofluids in a vertical rectangular duct considering radiation effects
title_sort heat transfer enhancement for combined convection flow of nanofluids in a vertical rectangular duct considering radiation effects
publisher Heat Transfer - Asian Research
publishDate 2011
url http://eprints.um.edu.my/6689/
http://www.scopus.com/inward/record.url?eid=2-s2.0-79959269326&partnerID=40&md5=0e4140adb80081ca4b7f7576f9deebae
_version_ 1648736056403558400
score 13.251813

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