Numerical analysis of heat transfer enhancement in grooved vertical Multi-Cylinders at various groove geometries
In this study, the natural convection enhancement in grooved vertical multi-cylinders at various groove geometries is investigated. The effects of several grooves ranging from 3 to 7, groove thickness ranging from 0.25 to 1 mm, and cylinder surface temperature ranging from 350 to 500 K at different...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Alexandria Engineering Journal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016823001539 |
| _version_ | 1827953764481368064 |
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| author | Mehdi Miansari Rajabali Hasanpour As'ad Alizadeh Davood Toghraie Omid Ali Akbari |
| author_facet | Mehdi Miansari Rajabali Hasanpour As'ad Alizadeh Davood Toghraie Omid Ali Akbari |
| author_sort | Mehdi Miansari |
| collection | DOAJ |
| description | In this study, the natural convection enhancement in grooved vertical multi-cylinders at various groove geometries is investigated. The effects of several grooves ranging from 3 to 7, groove thickness ranging from 0.25 to 1 mm, and cylinder surface temperature ranging from 350 to 500 K at different Rayleigh numbers are examined. The current study was simulated using the finite volume method using CFD with a laminar steady-state condition. The SIMPLE scheme is used for the pressure–velocity coupling discretization and the second-order upwind method is utilized to discretize the momentum and energy equations. The results obtained from the present research show that the presence of grooves on the cylinders will increase the heat transfer surface, create and intensify the secondary flow and mixing, and ultimately increase the heat transfer. Moreover, by increasing the number of grooves and its thickness, the amount of heat transfer increases dramatically. It’s also found that the groove thickness parameter's effectiveness on heat transfer is more than the groove number parameter. Ultimately, it’s demonstrated that using grooved cylinders leads to a 14 % augmentation in Nusselt number in comparison with employing plain cylinders. |
| first_indexed | 2024-04-09T14:19:45Z |
| format | Article |
| id | doaj.art-932a5d2287cc44c8bf452bf2365397e2 |
| institution | Directory Open Access Journal |
| issn | 1110-0168 |
| language | English |
| last_indexed | 2024-04-09T14:19:45Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj.art-932a5d2287cc44c8bf452bf2365397e22023-05-05T04:40:00ZengElsevierAlexandria Engineering Journal1110-01682023-05-0170535546Numerical analysis of heat transfer enhancement in grooved vertical Multi-Cylinders at various groove geometriesMehdi Miansari0Rajabali Hasanpour1As'ad Alizadeh2Davood Toghraie3Omid Ali Akbari4Department of Mechanical Engineering, Technical and Vocational University (TVU), Tehran, Iran; Corresponding authors.Department of Mechanical engineering, Qaemshahr Branch, Islamic Azad University, Qaemshahr, IranDepartment of Civil Engineering, College of Engineering, Cihan University-Erbil, Erbil, Iraq; Corresponding authors.Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran; Corresponding authors.Young Researchers and Elite Club, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, IranIn this study, the natural convection enhancement in grooved vertical multi-cylinders at various groove geometries is investigated. The effects of several grooves ranging from 3 to 7, groove thickness ranging from 0.25 to 1 mm, and cylinder surface temperature ranging from 350 to 500 K at different Rayleigh numbers are examined. The current study was simulated using the finite volume method using CFD with a laminar steady-state condition. The SIMPLE scheme is used for the pressure–velocity coupling discretization and the second-order upwind method is utilized to discretize the momentum and energy equations. The results obtained from the present research show that the presence of grooves on the cylinders will increase the heat transfer surface, create and intensify the secondary flow and mixing, and ultimately increase the heat transfer. Moreover, by increasing the number of grooves and its thickness, the amount of heat transfer increases dramatically. It’s also found that the groove thickness parameter's effectiveness on heat transfer is more than the groove number parameter. Ultimately, it’s demonstrated that using grooved cylinders leads to a 14 % augmentation in Nusselt number in comparison with employing plain cylinders.http://www.sciencedirect.com/science/article/pii/S1110016823001539Grooved cylinderMulti cylinders, Natural convectionVertical cylinder |
| spellingShingle | Mehdi Miansari Rajabali Hasanpour As'ad Alizadeh Davood Toghraie Omid Ali Akbari Numerical analysis of heat transfer enhancement in grooved vertical Multi-Cylinders at various groove geometries Alexandria Engineering Journal Grooved cylinder Multi cylinders, Natural convection Vertical cylinder |
| title | Numerical analysis of heat transfer enhancement in grooved vertical Multi-Cylinders at various groove geometries |
| title_full | Numerical analysis of heat transfer enhancement in grooved vertical Multi-Cylinders at various groove geometries |
| title_fullStr | Numerical analysis of heat transfer enhancement in grooved vertical Multi-Cylinders at various groove geometries |
| title_full_unstemmed | Numerical analysis of heat transfer enhancement in grooved vertical Multi-Cylinders at various groove geometries |
| title_short | Numerical analysis of heat transfer enhancement in grooved vertical Multi-Cylinders at various groove geometries |
| title_sort | numerical analysis of heat transfer enhancement in grooved vertical multi cylinders at various groove geometries |
| topic | Grooved cylinder Multi cylinders, Natural convection Vertical cylinder |
| url | http://www.sciencedirect.com/science/article/pii/S1110016823001539 |
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