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Article

Jet Impingement Cooling of a Rotating Hot Circular Cylinder with Hybrid Nanofluid under Multiple Magnetic Field Effects

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Department of Mechanical Engineering, College of Engineering, University of Ha’il, Ha’il City 81451, Saudi Arabia
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Department of Mechanical Engineering, Celal Bayar University, Manisa 45140, Turkey
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Department of Physics, College of Science, Qassim University, Buraidah 51452, Saudi Arabia
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Laboratory of Metrology and Energy Systems, National Engineering School of Monastir, University of Monastir, Monastir City 5000, Tunisia
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Materials, Energy and Renewable Energies Research Unit, Faculty of Sciences, University of Gafsa, Gafsa 2112, Tunisia
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Laboratory of Electro-Mechanical Systems (LASEM), National Engineering School of Sfax, University of Sfax, Sfax 3038, Tunisia
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Author to whom correspondence should be addressed.
Academic Editor: Arturo Hidalgo
Mathematics 2021, 9(21), 2697; https://doi.org/10.3390/math9212697
Received: 24 September 2021 / Revised: 11 October 2021 / Accepted: 21 October 2021 / Published: 24 October 2021
(This article belongs to the Special Issue Modeling and Numerical Analysis of Energy and Environment 2021)
The cooling performance of jet impinging hybrid nanofluid on a rotating hot circular cylinder was numerically assessed under the effects of multiple magnetic fields via finite element method. The numerical study was conducted for different values of Reynolds number (100Re300), rotational Reynolds number (0Rew800), lower and upper domain magnetic field strength (0Ha20), size of the rotating cylinder (2 w r 6 w) and distance between the jets (6 w ≤ H ≤ 16 w). In the presence of rotation at the highest speed, the Nu value was increased by about 5% when Re was increased from Re = 100 to Re = 300. This value was 48.5% for the configuration with the motionless cylinder. However, the rotations of the cylinder resulted in significant heat transfer enhancements in the absence or presence of magnetic field effects in the upper domain. At Ha1 = 0, the average Nu rose by about 175%, and the value was 249% at Ha1 = 20 when cases with the cylinder rotating at the highest speed were compared to the motionless cylinder case. When magnetic field strengths of the upper and lower domains are reduced, the average Nu decreases. The size of the cylinder is influential on the flow dynamics and heat transfer when the cylinder is rotating. An optimum value of the distance between the jets was obtained at H = 14 w, where the Nu value was highest for the rotating cylinder case. A modal analysis of the heat transfer dynamics was performed with the POD technique. As diverse applications of energy system technologies with impinging jets are available, considering the rotations of the cooled surface under the combined effects of using magnetic field and nanoparticle loading in heat transfer fluid is a novel contribution. The outcomes of the present work will be helpful in the initial design and optimization studies in applications from electronic cooling to convective drying, solar power and many other systems. View Full-Text
Keywords: MHD flow; impinging jets; rotating surface; surface rotation; hybrid nanofluid; finite element method MHD flow; impinging jets; rotating surface; surface rotation; hybrid nanofluid; finite element method
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MDPI and ACS Style

Ayadi, B.; Selimefendigil, F.; Alresheedi, F.; Kolsi, L.; Aich, W.; Said, L.B. Jet Impingement Cooling of a Rotating Hot Circular Cylinder with Hybrid Nanofluid under Multiple Magnetic Field Effects. Mathematics 2021, 9, 2697. https://doi.org/10.3390/math9212697

AMA Style

Ayadi B, Selimefendigil F, Alresheedi F, Kolsi L, Aich W, Said LB. Jet Impingement Cooling of a Rotating Hot Circular Cylinder with Hybrid Nanofluid under Multiple Magnetic Field Effects. Mathematics. 2021; 9(21):2697. https://doi.org/10.3390/math9212697

Chicago/Turabian Style

Ayadi, Badreddine, Fatih Selimefendigil, Faisal Alresheedi, Lioua Kolsi, Walid Aich, and Lotfi B. Said. 2021. "Jet Impingement Cooling of a Rotating Hot Circular Cylinder with Hybrid Nanofluid under Multiple Magnetic Field Effects" Mathematics 9, no. 21: 2697. https://doi.org/10.3390/math9212697

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