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Heat Transfer Modification within the Porous Layer of a Partially Filled Pipe at High Reynolds Number including Dispersion Effects
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics. Department of Mechanical Engineering, Tarbiat Modares University, P.O. Box 14115-143, Tehran, Iran.ORCID iD: 0000-0002-4627-2760
Faculty of Engineering, Amol University of Special Modern Technologies, Amol, Iran.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0002-1033-0244
Faculty of Food Industry and Agriculture, Standard Research Institute, Iranian National Standards Organization, Karaj, Iran.
2020 (English)In: Journal of Porous Media, ISSN 1091-028X, E-ISSN 1934-0508, Vol. 23, no 11, p. 1101-1121Article in journal (Refereed) Published
Abstract [en]

The present study deals with the fluid flow and heat transfer in a pipe partially filled with porous media at a high Reynolds number. In addition to turbulence effects in this situation, interstitial fluid mixing within the pores plays an important role, causing significant thermal dispersion. The aim of the present study is to evaluate and compare the effects of these phenomena on the heat transfer rate in a pipe partially filled with porous media at the core and over the wall. The parameters studied are Darcy number, solid/fluid conductivity ratio, Reynolds number, Prandtl number, and porous layer thickness. The results showed that dispersion effects increase with the increase of Darcy number, porous layer thickness, and Prandtl number. A similar trend is also observed for the variation of turbulence effects with these parameters except for Darcy number. It was also found that the heat transfer rate in a pipe partially filled with a porous layer over the wall is mainly affected by thermal dispersion and turbulence effects inside the porous media, while the Nusselt number is not affected by these phenomena when the porous media is inserted at the core.

Place, publisher, year, edition, pages
BEGELL HOUSE INC , 2020. Vol. 23, no 11, p. 1101-1121
Keywords [en]
turbulence, heat transfer, partially filled pipe, dispersion effects, boundary and central arrangements
National Category
Fluid Mechanics
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-81414DOI: 10.1615/JPorMedia.2020026212ISI: 000581910100004Scopus ID: 2-s2.0-85096127524OAI: oai:DiVA.org:ltu-81414DiVA, id: diva2:1501112
Note

Validerad;2020;Nivå 2;2020-11-16 (johcin)

Available from: 2020-11-16 Created: 2020-11-16 Last updated: 2025-02-09Bibliographically approved

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Fallahjoybari, NimaLundström, Staffan

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