Heat Transfer Augmentation and Entropy Generation Analysis of Microchannel Heat Sink (MCHS) with Symmetrical Ogive-Shaped Ribs

Kareem Akhtar (), Haseeb Ali, Israr Ud Din, Azed Abbas, Muhammad Zeeshan Zahir, Faraz Ahmad, Fayyaz Alam, Nasir Shah and Muhammad Aamir
Additional contact information
Kareem Akhtar: Department of Mechanical Engineering, University of Engineering and Technology, Peshawar 25000, Pakistan
Haseeb Ali: Department of Mechanical Engineering, School of Mechanical and Manufacturing Engineering (SMME), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
Israr Ud Din: Department of Mechanical Engineering, School of Mechanical and Manufacturing Engineering (SMME), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
Azed Abbas: Department of Mechanical Engineering, University of Engineering and Technology, Peshawar 25000, Pakistan
Muhammad Zeeshan Zahir: Department of Mechanical Engineering, University of Engineering and Technology, Peshawar 25000, Pakistan
Faraz Ahmad: Department of Mechanical Engineering, Aerospace and Aviation Campus, Air University Islamabad, Kamra, Islamabad 44000, Pakistan
Fayyaz Alam: Department of Mechanical Engineering, University of Engineering and Technology, Peshawar 25000, Pakistan
Nasir Shah: Department of Mechanical Engineering, University of Engineering and Technology, Peshawar 25000, Pakistan
Muhammad Aamir: School of Engineering, Edith Cowan University, Joondalup, WA 6027, Australia

Energies, 2023, vol. 16, issue 6, 1-23

Abstract: 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.

Keywords: microchannel heat sink; ogive ribs; thermal enhancement factor; Nusselt number; augmentation entropy generation number; thermal transport efficiency (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/16/6/2783/pdf (application/pdf)
https://www.mdpi.com/1996-1073/16/6/2783/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:16:y:2023:i:6:p:2783-:d:1099768

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().