Numerical simulation of three dimensional turbulent flow structure and heat transfer in ribbed-straight, divergent and convergent ducts

Article

Etminan, Amin, Harun, Zambri and Sharifian, Ahmad. 2016. "Numerical simulation of three dimensional turbulent flow structure and heat transfer in ribbed-straight, divergent and convergent ducts." International Journal of Mechanics. 10, pp. 362-367.
Article Title

Numerical simulation of three dimensional turbulent flow structure and heat transfer in ribbed-straight, divergent and convergent ducts

ERA Journal ID39606
Article CategoryArticle
AuthorsEtminan, Amin (Author), Harun, Zambri (Author) and Sharifian, Ahmad (Author)
Journal TitleInternational Journal of Mechanics
Journal Citation10, pp. 362-367
Number of Pages6
Year2016
Place of PublicationGreece
ISSN1998-4448
Web Address (URL)http://naun.org/cms.action?id=12113
Abstract

Turbulent heat transfer and flow structure inside straight, divergent and convergent ducts with square ribs has been investigated for Reynolds number varying from 7000 to 100000 numerically. The simulations have been employed using the one and two turbulent models in particular Re-normalization group (RNG) as the most efficient model. The impact of divergence or convergence on thermal efficiency of ducts during cooling process is explored in two and three dimensional flow regimes. Results reveal that divergent channel transfers higher amount of heat in comparison to other kinds of channels. Furthermore, divergent channel records less pressure loss and higher thermal efficiency where fully developed flow can be seen just through the straight duct. Computational data show a good agreement with experimental results available in the literature.

Keywordsnumerical simulation; heat transfer enhancement; square rib; vortex generator; straight/convergent/divergent ducts
ANZSRC Field of Research 2020401201. Aerodynamics (excl. hypersonic aerodynamics)
401703. Energy generation, conversion and storage (excl. chemical and electrical)
401799. Mechanical engineering not elsewhere classified
401706. Numerical modelling and mechanical characterisation
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Byline AffiliationsNational University of Malaysia
Department of Mechanical and Mechatronic Engineering
Institution of OriginUniversity of Southern Queensland
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