Free convection of Al2O3-water nanofluid inside a hexagonal-shaped enclosure with cold diamond-shaped obstacles and periodic magnetic field
The hydrothermal characteristics of fluid flow within a hexagonal enclosure hold immense significance due to their wide-ranging applications in various fields. Despite their potential importance, there is currently a limited understanding of free convection flow within these geometries. This study a...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-10-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23007359 |
| _version_ | 1797670301964697600 |
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| author | Manoj Kumar Nayak Abdul Sattar Dogonchi Alireza Rahbari |
| author_facet | Manoj Kumar Nayak Abdul Sattar Dogonchi Alireza Rahbari |
| author_sort | Manoj Kumar Nayak |
| collection | DOAJ |
| description | The hydrothermal characteristics of fluid flow within a hexagonal enclosure hold immense significance due to their wide-ranging applications in various fields. Despite their potential importance, there is currently a limited understanding of free convection flow within these geometries. This study aims to tackle this aspect by considering the effect of cold diamond-shaped obstacles and periodic magnetic field. The cavity top inclined walls are uniformly heated while bottom inclined walls are considered as heaters. The straight top and bottom walls of the cavity are adiabatic. The numerical solution is obtained via finite element method. The results indicate a substantial augmentation of streamlines, x- and y-direction velocities, entropy and average Bejan number with increase in the Rayleigh number. Inducing stronger magnetic field force reduces x- and y-direction velocities, average Bejan number and entropy generation. The average Nusselt number improves by 76.16% for Rayleigh number ranging from 105 to 106 at several lengths of hot surface. Among the cases analyzed in this research, moving the diamonds from the middle (Case A) to top (Case B) and bottom (Case C) enhances and reduces the Nusselt number by 6.3% and 7.5%, respectively. |
| first_indexed | 2024-03-11T20:57:43Z |
| format | Article |
| id | doaj.art-693a6ea3a6114175ba79cf6be2be4a52 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-03-11T20:57:43Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-693a6ea3a6114175ba79cf6be2be4a522023-09-30T04:54:39ZengElsevierCase Studies in Thermal Engineering2214-157X2023-10-0150103429Free convection of Al2O3-water nanofluid inside a hexagonal-shaped enclosure with cold diamond-shaped obstacles and periodic magnetic fieldManoj Kumar Nayak0Abdul Sattar Dogonchi1Alireza Rahbari2Department of Mechanical Engineering, FET, ITER, Siksha ‘o' Anusandhan University, Bhubaneswar, 751030, IndiaDepartment of Mechanical Engineering, Aliabad Katoul Branch, Islamic Azad University, Aliabad Katoul, IranSchool of Engineering, The Australian National University, ACT, 2601, Australia; Corresponding author.The hydrothermal characteristics of fluid flow within a hexagonal enclosure hold immense significance due to their wide-ranging applications in various fields. Despite their potential importance, there is currently a limited understanding of free convection flow within these geometries. This study aims to tackle this aspect by considering the effect of cold diamond-shaped obstacles and periodic magnetic field. The cavity top inclined walls are uniformly heated while bottom inclined walls are considered as heaters. The straight top and bottom walls of the cavity are adiabatic. The numerical solution is obtained via finite element method. The results indicate a substantial augmentation of streamlines, x- and y-direction velocities, entropy and average Bejan number with increase in the Rayleigh number. Inducing stronger magnetic field force reduces x- and y-direction velocities, average Bejan number and entropy generation. The average Nusselt number improves by 76.16% for Rayleigh number ranging from 105 to 106 at several lengths of hot surface. Among the cases analyzed in this research, moving the diamonds from the middle (Case A) to top (Case B) and bottom (Case C) enhances and reduces the Nusselt number by 6.3% and 7.5%, respectively.http://www.sciencedirect.com/science/article/pii/S2214157X23007359Hexagonal enclosureDiamond shaped obstaclesPeriodic magnetic fieldNanofluid |
| spellingShingle | Manoj Kumar Nayak Abdul Sattar Dogonchi Alireza Rahbari Free convection of Al2O3-water nanofluid inside a hexagonal-shaped enclosure with cold diamond-shaped obstacles and periodic magnetic field Case Studies in Thermal Engineering Hexagonal enclosure Diamond shaped obstacles Periodic magnetic field Nanofluid |
| title | Free convection of Al2O3-water nanofluid inside a hexagonal-shaped enclosure with cold diamond-shaped obstacles and periodic magnetic field |
| title_full | Free convection of Al2O3-water nanofluid inside a hexagonal-shaped enclosure with cold diamond-shaped obstacles and periodic magnetic field |
| title_fullStr | Free convection of Al2O3-water nanofluid inside a hexagonal-shaped enclosure with cold diamond-shaped obstacles and periodic magnetic field |
| title_full_unstemmed | Free convection of Al2O3-water nanofluid inside a hexagonal-shaped enclosure with cold diamond-shaped obstacles and periodic magnetic field |
| title_short | Free convection of Al2O3-water nanofluid inside a hexagonal-shaped enclosure with cold diamond-shaped obstacles and periodic magnetic field |
| title_sort | free convection of al2o3 water nanofluid inside a hexagonal shaped enclosure with cold diamond shaped obstacles and periodic magnetic field |
| topic | Hexagonal enclosure Diamond shaped obstacles Periodic magnetic field Nanofluid |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23007359 |
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