Heat Transfer Augmentation and Entropy Generation Analysis of Microchannel Heat Sink (MCHS) with Symmetrical Ogive-Shaped Ribs
This study proposes the use of symmetrical ogive-shaped ribs on the walls of microchannel heat sinks (MCHS) to improve their thermal performance with minimal pressure drop. The ribs are arranged in three different configurations: ribs attached to all channel walls (MC-SAWR), ribs attached to side ch...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/6/2783 |
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| author | Kareem Akhtar Haseeb Ali Israr Ud Din Azed Abbas Muhammad Zeeshan Zahir Faraz Ahmad Fayyaz Alam Nasir Shah Muhammad Aamir |
| author_facet | Kareem Akhtar Haseeb Ali Israr Ud Din Azed Abbas Muhammad Zeeshan Zahir Faraz Ahmad Fayyaz Alam Nasir Shah Muhammad Aamir |
| author_sort | Kareem Akhtar |
| collection | DOAJ |
| description | This study proposes the use of symmetrical ogive-shaped ribs on the walls of microchannel heat sinks (MCHS) to improve their thermal performance with minimal pressure drop. The ribs are arranged in three different configurations: ribs attached to all channel walls (MC-SAWR), ribs attached to side channel walls (MC-SSWR), and ribs attached to the bottom channel wall (MC-SBWR). Numerical investigations are conducted using the laminar conjugate heat transfer model to study the flow and heat transfer characteristics of the MCHS. The augmentation entropy generation number and thermal enhancement factor criterion are used to quantify the overall hydrothermal performance of the MCHS. The results show that the inclusion of symmetrical ogive-shaped ribs improves the Nusselt number of MCHS. The MC-SAWR configuration shows the highest Nusselt number improvement of 13–50% compared to the smooth MCHS over the Reynolds number range of 100–1000. Additionally, the MC-SAWR configuration shows a maximum reduction of 58% in the total entropy generation rate as it has the smallest augmentation entropy generation number value of 0.42. In terms of the thermal enhancement factor criterion, the MC-SSWR configuration shows the highest performance at Reynolds numbers below 400, but the MC-SAWR configuration outperformed the MC-SSWR configuration at Reynolds numbers above 400. Therefore, the MC-SAWR configuration is the best configuration that provides high cooling performance. |
| first_indexed | 2024-03-11T06:37:20Z |
| format | Article |
| id | doaj.art-de37edee90474922ac3a3864fc49f661 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T06:37:20Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-de37edee90474922ac3a3864fc49f6612023-11-17T10:50:55ZengMDPI AGEnergies1996-10732023-03-01166278310.3390/en16062783Heat Transfer Augmentation and Entropy Generation Analysis of Microchannel Heat Sink (MCHS) with Symmetrical Ogive-Shaped RibsKareem Akhtar0Haseeb Ali1Israr Ud Din2Azed Abbas3Muhammad Zeeshan Zahir4Faraz Ahmad5Fayyaz Alam6Nasir Shah7Muhammad Aamir8Department of Mechanical Engineering, University of Engineering and Technology, Peshawar 25000, PakistanDepartment of Mechanical Engineering, School of Mechanical and Manufacturing Engineering (SMME), National University of Sciences and Technology (NUST), Islamabad 44000, PakistanDepartment of Mechanical Engineering, School of Mechanical and Manufacturing Engineering (SMME), National University of Sciences and Technology (NUST), Islamabad 44000, PakistanDepartment of Mechanical Engineering, University of Engineering and Technology, Peshawar 25000, PakistanDepartment of Mechanical Engineering, University of Engineering and Technology, Peshawar 25000, PakistanDepartment of Mechanical Engineering, Aerospace and Aviation Campus, Air University Islamabad, Kamra, Islamabad 44000, PakistanDepartment of Mechanical Engineering, University of Engineering and Technology, Peshawar 25000, PakistanDepartment of Mechanical Engineering, University of Engineering and Technology, Peshawar 25000, PakistanSchool of Engineering, Edith Cowan University, Joondalup, WA 6027, AustraliaThis study proposes the use of symmetrical ogive-shaped ribs on the walls of microchannel heat sinks (MCHS) to improve their thermal performance with minimal pressure drop. The ribs are arranged in three different configurations: ribs attached to all channel walls (MC-SAWR), ribs attached to side channel walls (MC-SSWR), and ribs attached to the bottom channel wall (MC-SBWR). Numerical investigations are conducted using the laminar conjugate heat transfer model to study the flow and heat transfer characteristics of the MCHS. The augmentation entropy generation number and thermal enhancement factor criterion are used to quantify the overall hydrothermal performance of the MCHS. The results show that the inclusion of symmetrical ogive-shaped ribs improves the Nusselt number of MCHS. The MC-SAWR configuration shows the highest Nusselt number improvement of 13–50% compared to the smooth MCHS over the Reynolds number range of 100–1000. Additionally, the MC-SAWR configuration shows a maximum reduction of 58% in the total entropy generation rate as it has the smallest augmentation entropy generation number value of 0.42. In terms of the thermal enhancement factor criterion, the MC-SSWR configuration shows the highest performance at Reynolds numbers below 400, but the MC-SAWR configuration outperformed the MC-SSWR configuration at Reynolds numbers above 400. Therefore, the MC-SAWR configuration is the best configuration that provides high cooling performance.https://www.mdpi.com/1996-1073/16/6/2783microchannel heat sinkogive ribsthermal enhancement factorNusselt numberaugmentation entropy generation numberthermal transport efficiency |
| spellingShingle | Kareem Akhtar Haseeb Ali Israr Ud Din Azed Abbas Muhammad Zeeshan Zahir Faraz Ahmad Fayyaz Alam Nasir Shah Muhammad Aamir Heat Transfer Augmentation and Entropy Generation Analysis of Microchannel Heat Sink (MCHS) with Symmetrical Ogive-Shaped Ribs Energies microchannel heat sink ogive ribs thermal enhancement factor Nusselt number augmentation entropy generation number thermal transport efficiency |
| title | Heat Transfer Augmentation and Entropy Generation Analysis of Microchannel Heat Sink (MCHS) with Symmetrical Ogive-Shaped Ribs |
| title_full | Heat Transfer Augmentation and Entropy Generation Analysis of Microchannel Heat Sink (MCHS) with Symmetrical Ogive-Shaped Ribs |
| title_fullStr | Heat Transfer Augmentation and Entropy Generation Analysis of Microchannel Heat Sink (MCHS) with Symmetrical Ogive-Shaped Ribs |
| title_full_unstemmed | Heat Transfer Augmentation and Entropy Generation Analysis of Microchannel Heat Sink (MCHS) with Symmetrical Ogive-Shaped Ribs |
| title_short | Heat Transfer Augmentation and Entropy Generation Analysis of Microchannel Heat Sink (MCHS) with Symmetrical Ogive-Shaped Ribs |
| title_sort | heat transfer augmentation and entropy generation analysis of microchannel heat sink mchs with symmetrical ogive shaped ribs |
| topic | microchannel heat sink ogive ribs thermal enhancement factor Nusselt number augmentation entropy generation number thermal transport efficiency |
| url | https://www.mdpi.com/1996-1073/16/6/2783 |
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