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Heat transfer enhancement in a corrugated-trapezoidal channel using winglet vortex generators

In this study, heat transfer rates and flow behavior of water inside corrugated channel with a new configuration of winglet longitudinal vortex-generators have been numerically carried out. In general, the main objective of using the winglet longitudinal vortex-generators with the corrugated surface...

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Main Authors: Nfawa S.R., Talib A.R.A., Masuri S.U., Basri A.A., Hasini H.
Other Authors: 57204145914
Format: Article
Published: Penerbit Akademia Baru 2023
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spelling my.uniten.dspace-249012023-05-29T15:28:31Z Heat transfer enhancement in a corrugated-trapezoidal channel using winglet vortex generators Nfawa S.R. Talib A.R.A. Masuri S.U. Basri A.A. Hasini H. 57204145914 21741790100 24437439900 56572643700 6507435998 In this study, heat transfer rates and flow behavior of water inside corrugated channel with a new configuration of winglet longitudinal vortex-generators have been numerically carried out. In general, the main objective of using the winglet longitudinal vortex-generators with the corrugated surfaces is to obtain an increase in the rate of heat exchange by generating vortex and reverse flow which in turn increases the efficiency of the thermal process, leading to save operating costs. To achieve this purpose, four amplitude heights are introduced: a = 1, 2, 3 and 4 mm. Furthermore, the arrangement of winglet longitudinal vortex-generator is placed at the entrance of each wave existing with the same as the slant angle of the waves in the trapezoidal channel. A constant heat flux is adopted to be the thermal condition for the lower and upper corrugated walls while the Reynolds numbers (Re) rate is in the range of 5,000 to 17,500. The effects of the trapezoidal amplitude heights with winglets longitudinal vortex-generator are studied and compared using the non-dimensional parameter performance evaluation criteria (PEC). Thermal and flow characteristics are explored with the help of the stream wise velocity and isotherms contours for trapezoidal-corrugated channels with winglet inserts and different amplitudes. Nusselt number (Nu), skin friction coefficient and PEC are substantial factors that studied at turbulent flow. According to the results obtained, the winglet longitudinal in corrugated duct has showed a significant improvement of the Nu but accompanied by increased of skin friction coefficient over those of a plane duct. Consequently, winglet longitudinal vortex-generator with corrugated channel might be favorable in several heat transfer applications. � 2019 PENERBIT AKADEMIA BARU - All rights reserved. Final 2023-05-29T07:28:31Z 2023-05-29T07:28:31Z 2019 Article 2-s2.0-85076444152 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85076444152&partnerID=40&md5=ac551f233439df15a725546fff5d374c https://irepository.uniten.edu.my/handle/123456789/24901 11 10 69 80 Penerbit Akademia Baru Scopus
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
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description In this study, heat transfer rates and flow behavior of water inside corrugated channel with a new configuration of winglet longitudinal vortex-generators have been numerically carried out. In general, the main objective of using the winglet longitudinal vortex-generators with the corrugated surfaces is to obtain an increase in the rate of heat exchange by generating vortex and reverse flow which in turn increases the efficiency of the thermal process, leading to save operating costs. To achieve this purpose, four amplitude heights are introduced: a = 1, 2, 3 and 4 mm. Furthermore, the arrangement of winglet longitudinal vortex-generator is placed at the entrance of each wave existing with the same as the slant angle of the waves in the trapezoidal channel. A constant heat flux is adopted to be the thermal condition for the lower and upper corrugated walls while the Reynolds numbers (Re) rate is in the range of 5,000 to 17,500. The effects of the trapezoidal amplitude heights with winglets longitudinal vortex-generator are studied and compared using the non-dimensional parameter performance evaluation criteria (PEC). Thermal and flow characteristics are explored with the help of the stream wise velocity and isotherms contours for trapezoidal-corrugated channels with winglet inserts and different amplitudes. Nusselt number (Nu), skin friction coefficient and PEC are substantial factors that studied at turbulent flow. According to the results obtained, the winglet longitudinal in corrugated duct has showed a significant improvement of the Nu but accompanied by increased of skin friction coefficient over those of a plane duct. Consequently, winglet longitudinal vortex-generator with corrugated channel might be favorable in several heat transfer applications. � 2019 PENERBIT AKADEMIA BARU - All rights reserved.
author2 57204145914
author_facet 57204145914
Nfawa S.R.
Talib A.R.A.
Masuri S.U.
Basri A.A.
Hasini H.
format Article
author Nfawa S.R.
Talib A.R.A.
Masuri S.U.
Basri A.A.
Hasini H.
spellingShingle Nfawa S.R.
Talib A.R.A.
Masuri S.U.
Basri A.A.
Hasini H.
Heat transfer enhancement in a corrugated-trapezoidal channel using winglet vortex generators
author_sort Nfawa S.R.
title Heat transfer enhancement in a corrugated-trapezoidal channel using winglet vortex generators
title_short Heat transfer enhancement in a corrugated-trapezoidal channel using winglet vortex generators
title_full Heat transfer enhancement in a corrugated-trapezoidal channel using winglet vortex generators
title_fullStr Heat transfer enhancement in a corrugated-trapezoidal channel using winglet vortex generators
title_full_unstemmed Heat transfer enhancement in a corrugated-trapezoidal channel using winglet vortex generators
title_sort heat transfer enhancement in a corrugated-trapezoidal channel using winglet vortex generators
publisher Penerbit Akademia Baru
publishDate 2023
_version_ 1806424175599943680
score 13.211869

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