Effect of Rayleigh number on internal eccentricity in a heated horizontal elliptical cylinder to its coaxial square enclosure

• Autorzy: Bouras Abdelkrim , Taloub Djedid , Driss Zied

Identyfikatory

DOI

10.2478/ijame-2020-0032

• Języki publikacji: EN

Abstrakty

EN

This paper deals with numerical investigation of a natural convective flow in a horizontal annular space between a heated square inner cylinder and a cold elliptical outer cylinder with a Newtonian fluid. Uniform temperatures are imposed along walls of the enclosure. The governing equations of the problem were solved numerically by the commercial code Fluent, based on the finite volume method and the Boussinesq approximation. The effects of Geometry Ratio GR and Rayleigh numbers on fluid flow and heat transfer performance are investigated. The Rayleigh number is varied from 103 to 106. Throughout the study the relevant results are presented in terms of isotherms, and streamlines. From the results, we found that the increase in the Geometry Ratio B leads to an increase of the heat transfer coefficient. The heat transfer rate in the annulus is translated in terms of the average Nusselt numbers along the enclosure's sides. Tecplot 7 program was used to plot the curves which cleared these relations and isotherms and streamlines which illustrate the behavior of air through the channel and its variation with other parameters. The results for the streamlines, isotherms, local and average Nusselt numbers average Nusselt numbers are compared with previous works and show good agreement.

Słowa kluczowe

EN

natural convection; newtonian fluid; geometry ratio; Rayleigh number; elliptical cylinder

PL

konwekcja naturalna; płyn Newtona; liczba Rayleigha

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2020
• Tom: Vol. 25, no. 3
• Strony: 17--29
• Opis fizyczny: Bibliogr. 18 poz., rys., tab., wykr.

Twórcy

autor

Bouras Abdelkrim

• Department of Physics, Faculty of Sciences University Mohamed Boudiaf of M’sila M’sila, ALGERIA
• Laboratory of Energetic Physics, University Frères Mentouri Constantine 1 Constantine, ALGERIA

autor

Taloub Djedid

• Department of Physics, Faculty of Sciences University Mohamed Boudiaf of M’sila M’sila, ALGERIA
• Laboratory of Renewable Energy and Sustainable Development (LRESD) University Frères Mentouri Constantine1 Constantine, ALGERIA

autor

Driss Zied

• Laboratory of Electromechanical Systems (LASEM) National School of Engineers of Sfax (ENIS), University of Sfax Sfax, TUNISIA

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)