Thermodynamic analysis of radiating nanofluids mixed convection within concentric pipes filled with a porous medium

• Autorzy: Makinde Oluwole Daniel , Mabood Fazle , Khan Waqar Ahmed , Makinde Anuoluwa Esther

Identyfikatory

DOI

10.24423/EngTrans.2249.20230601

• Języki publikacji: EN

Abstrakty

EN

In this study, the entropy generation resulting from heat and mass transfer of waterbased nanofluid through an annulus within two concentric vertical pipes filled with a porous medium is investigated. This study considers the effects of thermal radiation, viscous dissipation, thermal buoyancy, and axial pressure gradient in addition to heat and mass transfer. Brownian motion and thermophoresis have been introduced through the Buongiorno model. The similarity solution was used to solve nonlinear ordinary differential equations. The RungeKutta-Fehlberg method is used to solve these equations with the related boundary conditions. The effects of pertinent parameters such as pressure gradient, thermal radiation, viscosity parameter, thermophoretic parameter, Brownian motion parameter, and Eckert number are investigated numerically. This study found that the Bejan number increases as the viscosity parameter increases and decreases as the other active parameters increase. As the radiation parameter, thermophoretic parameter, Brownian parameter, and Eckert number increase, the Nusselt number decreases. The total entropy generation rate is found to increase with the fluid viscosity rate, Grashof number, thermal Biot number, and variable pressure gradient. However, the Bejan number is found to decrease with these parameters, as well as the Prandtl number.

Słowa kluczowe

EN

nanofluid; concentric pipes; mixed convection; thermal radiation; porous medium; entropy analysis

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Engineering Transactions
• Rocznik: 2023
• Tom: Vol. 71, iss. 3
• Strony: 419--438
• Opis fizyczny: Bibliogr. 31 poz., rys., wykr.

Twórcy

autor

Makinde Oluwole Daniel

• Faculty of Military Science, Stellenbosch University Private Bag X2, Saldanha 7395, South Africa

autor

Mabood Fazle

• Department of Information Technology, Fanshawe College London ON, Canada

autor

Khan Waqar Ahmed

• Department of Mechanical Engineering, College of Engineering, Prince Mohammad Bin Fahd University Al Khobar 31952, Kingdom of Saudi Arabia

autor

Makinde Anuoluwa Esther

• Faculty of Engineering, Stellenbosch University Private Bag X1, Matieland 7602, South Africa

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).