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General Information
    • ISSN: 1793-8198
    • Frequency: Quarterly
    • DOI: 10.18178/IJMMM
    • Editor-in-Chief: Prof. K. M. Gupta, Prof. Ian McAndrew
    • Executive Editor: Ms. Cherry L. Chen
    • Abstracting/Indexing: EI (INSPEC, IET), Chemical Abstracts Services (CAS), Engineering & Technology Digital Library,  ProQuest, Crossref, Ulrich's Periodicals Directory, DOAJ, and Electronic Journals Library .
    • E-mail ijmmm@ejournal.net
Editor-in-chief
Prof. Ian McAndrew
Embry Riddle Aeronautical University, UK.
It is my honor to be the editor-in-chief of IJMMM. I will do my best to help develop this journal better.

IJMMM 2016 Vol.4(4): 282-287 ISSN: 1793-8198
DOI: 10.18178/ijmmm.2016.4.4.272

The 3D-Computational Study of the Heat Transfer Enhancement by Using of the Longitudinal and Transversal Internal Fins in a Heated Horizontal Pipe

Sofiane Touahri and Toufik Boufendi
Abstract—In this work, we numerically study the three-dimensional mixed convection heat transfer in a horizontal pipe equipped by longitudinal and transversal attached fins on its internal surface for the solar application such as the water or air heating with solar panel. The pipe and fins are heated by an electrical intensity passing through their small thickness. The longitudinal fins studied number is: 2 vertical, 4 and 8 fins, while the number of transversal fins is 8 fins. The considered heights fin are H=0.12 cm and H=0.18 cm. The convection in the fluid domain is conjugated to thermal conduction in the pipe and fins solid thickness. The physical properties of the fluid are thermal dependant. The heat losses from the external pipe surface to the surrounding ambient are considered. The model equations of continuity, momenta and energy are numerically solved by a finite volume method with a second order spatiotemporal discretization. As expected for the longitudinal fins, the axial Nusselt number increase with increasing of number and height of fins. For Gr= 5.1 105, the average Nusselt number without fins is equal to 13.144. The introduce of longitudinal fins gives an average Nusselt number equal to 16.83, 22.523 and 32.066 for 2 vertical, 4 and 8 fins respectively. The participation of fins located in the lower part of the tube on the improvement of heat transfer is higher than the participation of the upper fins. On the other hand, the longitudinal fins participate directly on increase of the heat transfer; this is justified by the large local Nusselt number along the interface of the fins. This participation is moderate in the case of transverse fins, these latter are used to mix the fluid for increased the local Nusselt number to the interface in the cylindrical axial sections following the transversal fins.

Index Terms—Conjugate heat transfer, internal fins, mixed convection, numerical simulation.

The authors are with Energy Physics Laboratory, Physics Department, Mentouri Brothers University, Constantine, Algeria (e-mail: sofianetouahri04@yahoo.fr, boufendit@yahoo.fr).

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Cite: Sofiane Touahri and Toufik Boufendi, "The 3D-Computational Study of the Heat Transfer Enhancement by Using of the Longitudinal and Transversal Internal Fins in a Heated Horizontal Pipe," International Journal of Materials, Mechanics and Manufacturing vol. 4, no. 4, pp. 282-287, 2016.

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