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

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 (<inline-formula><math xm...

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Autores principales:	Badreddine Ayadi, Fatih Selimefendigil, Faisal Alresheedi, Lioua Kolsi, Walid Aich, Lotfi Ben Said
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	MHD flow impinging jets rotating surface surface rotation hybrid nanofluid finite element method Mathematics QA1-939
Acceso en línea:	https://doaj.org/article/4cfd599703f440f48a5877efa3bd1a28
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spelling	oai:doaj.org-article:4cfd599703f440f48a5877efa3bd1a282021-11-11T18:15:39ZJet Impingement Cooling of a Rotating Hot Circular Cylinder with Hybrid Nanofluid under Multiple Magnetic Field Effects10.3390/math92126972227-7390https://doaj.org/article/4cfd599703f440f48a5877efa3bd1a282021-10-01T00:00:00Zhttps://www.mdpi.com/2227-7390/9/21/2697https://doaj.org/toc/2227-7390The 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 (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>100</mn><mo>≤</mo><mi>Re</mi><mo>≤</mo><mn>300</mn></mrow></semantics></math></inline-formula>), rotational Reynolds number (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>0</mn><mo>≤</mo><mi>Rew</mi><mo>≤</mo><mn>800</mn></mrow></semantics></math></inline-formula>), lower and upper domain magnetic field strength (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>0</mn><mo>≤</mo><mi>Ha</mi><mo>≤</mo><mn>20</mn></mrow></semantics></math></inline-formula>), size of the rotating cylinder (2 w <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>≤</mo><mi>r</mi><mo>≤</mo></mrow></semantics></math></inline-formula> 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.Badreddine AyadiFatih SelimefendigilFaisal AlresheediLioua KolsiWalid AichLotfi Ben SaidMDPI AGarticleMHD flowimpinging jetsrotating surfacesurface rotationhybrid nanofluidfinite element methodMathematicsQA1-939ENMathematics, Vol 9, Iss 2697, p 2697 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	MHD flow impinging jets rotating surface surface rotation hybrid nanofluid finite element method Mathematics QA1-939
spellingShingle	MHD flow impinging jets rotating surface surface rotation hybrid nanofluid finite element method Mathematics QA1-939 Badreddine Ayadi Fatih Selimefendigil Faisal Alresheedi Lioua Kolsi Walid Aich Lotfi Ben Said Jet Impingement Cooling of a Rotating Hot Circular Cylinder with Hybrid Nanofluid under Multiple Magnetic Field Effects
description	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 (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>100</mn><mo>≤</mo><mi>Re</mi><mo>≤</mo><mn>300</mn></mrow></semantics></math></inline-formula>), rotational Reynolds number (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>0</mn><mo>≤</mo><mi>Rew</mi><mo>≤</mo><mn>800</mn></mrow></semantics></math></inline-formula>), lower and upper domain magnetic field strength (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>0</mn><mo>≤</mo><mi>Ha</mi><mo>≤</mo><mn>20</mn></mrow></semantics></math></inline-formula>), size of the rotating cylinder (2 w <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>≤</mo><mi>r</mi><mo>≤</mo></mrow></semantics></math></inline-formula> 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.
format	article
author	Badreddine Ayadi Fatih Selimefendigil Faisal Alresheedi Lioua Kolsi Walid Aich Lotfi Ben Said
author_facet	Badreddine Ayadi Fatih Selimefendigil Faisal Alresheedi Lioua Kolsi Walid Aich Lotfi Ben Said
author_sort	Badreddine Ayadi
title	Jet Impingement Cooling of a Rotating Hot Circular Cylinder with Hybrid Nanofluid under Multiple Magnetic Field Effects
title_short	Jet Impingement Cooling of a Rotating Hot Circular Cylinder with Hybrid Nanofluid under Multiple Magnetic Field Effects
title_full	Jet Impingement Cooling of a Rotating Hot Circular Cylinder with Hybrid Nanofluid under Multiple Magnetic Field Effects
title_fullStr	Jet Impingement Cooling of a Rotating Hot Circular Cylinder with Hybrid Nanofluid under Multiple Magnetic Field Effects
title_full_unstemmed	Jet Impingement Cooling of a Rotating Hot Circular Cylinder with Hybrid Nanofluid under Multiple Magnetic Field Effects
title_sort	jet impingement cooling of a rotating hot circular cylinder with hybrid nanofluid under multiple magnetic field effects
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4cfd599703f440f48a5877efa3bd1a28
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Jet Impingement Cooling of a Rotating Hot Circular Cylinder with Hybrid Nanofluid under Multiple Magnetic Field Effects

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