Numerical simulation of buoyancy-induced heat transfer and entropy generation in 3D C-shaped cavity filled with CNT–Al<sub>2</sub>O<sub>3</sub>/water hybrid nanofluid-Reference-Cited by-同舟云学术

Numerical simulation of buoyancy-induced heat transfer and entropy generation in 3D C-shaped cavity filled with CNT–Al₂O₃/water hybrid nanofluid

Published:2022-02-02 Issue:0 Volume:0 Page:
ISSN:2191-0294
Container-title:International Journal of Nonlinear Sciences and Numerical Simulation
language:en
Short-container-title:

Author:

Aich Walid¹²,Chaabane Raoudha³,Öztop Hakan⁴⁵,Almeshaal Mohammed A.⁶,Maatki Chemseddine⁶⁷,Kahouli Omar⁸⁹,Kolsi Lioua¹⁷

Affiliation:

1. Mechanical Engineering Department, College of Engineering , University of Ha’il , Ha’il City , Saudi Arabia

2. Materials, Energy and Renewable Energies Research Unit, Faculty of Sciences , University of Gafsa , Gafsa 2112 , Tunisia

3. Laboratoire d’Etudes des Systèmes Thermiques et Energétiques , Ecole Nationale d’Ingénieurs de Monastir , Avenue Ibn El Jazzar, 5019 , Monastir , Tunisie

4. Department of Mechanical Engineering , Fırat University , Elazig TR-23119 , Turkey

5. Department of Medical Research , China Medical University Hospital, China Medical University , Taichung , Taiwan

6. Mechanical Engineering Department, College of Engineering , Imam Mohammad Ibn Saud Islamic University , Riyadh , Saudi Arabia

7. Laboratory of Metrology and Energy systems , University of Monastir , Monastir 5000 , Tunisia

8. Department of Electronics Engineering, Community College , University of Ha’il , Ha’il , Saudi Arabia

9. Control & Energies Management Laboratory (CEM-Lab), National Engineering School of Sfax , University of Sfax , Sfax , Tunisia

Abstract

Abstract Three-dimensional investigation has been carried out to simulate buoyancy induced heat transfer and fluid flow as well as entropy creation inside C-shaped enclosure charged with based water CNT–Al2O3 (15–85%) hybrid nanofluid. Left side is isothermally heated while the vertical portions of the right wall are isothermally cooled. Effects of various parameters on the flow behavior and the produced irreversibilities, namely the cavity aspect ratio (0.1 ≤ Ar ≤ 0.4), Rayleigh number (103 ≤ Ra ≤ 106) and volumetric fraction of hybrid nanofluid (0 ≤ φ ≤ 0.06) have been examined. It was revealed that the aspect ratio is the main controlling parameter of thermal energy transfer and generated entropy. In addition, for specific Ra, adding hybrid nanoparticles leads to the increase of the average Nusselt number while the highest produced entropy is observed with higher Rayleigh number. Moreover, the maximum Bejan number occurred for a shape factor Ar = 0.1 and Ra = 104 disregarding the hybrid nanoparticles volume fraction showing the dominance of thermal irreversibility over the viscous dissipation irreversibility in such conditions.

Publisher

Walter de Gruyter GmbH

Subject

Applied Mathematics,General Physics and Astronomy,Mechanics of Materials,Engineering (miscellaneous),Modeling and Simulation,Computational Mechanics,Statistical and Nonlinear Physics

Link

https://www.degruyter.com/document/doi/10.1515/ijnsns-2021-0246/pdf

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