Heat transfer enhancement in a p-shape finned radial heat sink subjected to natural convection: Thermal significance of slot and dimples in fin

  • Ibrahim Ademola Fetuga Department of Mechanical Engineering, University of Lagos – Akoka. Yaba-Lagos, Nigeria http://orcid.org/0000-0002-1943-4234
  • Olabode Thomas Olakoyejo Department of Mechanical Engineering, University of Lagos – Akoka. Yaba-Lagos, Nigeria http://orcid.org/0000-0001-9942-1339
  • Adekunle Omolade Adelaja Department of Mechanical Engineering, University of Lagos – Akoka. Yaba-Lagos, Nigeria http://orcid.org/0000-0001-9175-8332
  • Joshua Kolawole Gbegudu Department of Mechanical Engineering, University of Lagos – Akoka. Yaba-Lagos, Nigeria http://orcid.org/0000-0003-2417-2520
DOI: https://doi.org/10.5935/jetia.v8i34.804

Abstract

This study presents the optimum design of the radial heat sink for light-emitting diode (LED) under natural convection. A radial heat sink with a hollow circular base and a P-shape fin type incorporated with either slots or both slots and dimples was numerically investigated using the ANSYS (Fluent) commercial code, with the aim of achieving better cooling performance at a lower heat sink mass.  The average temperature (Tavg) and mass of the HS for various model designs, namely; Type A (HS with plain fin), Type B (HS with slot) and Type C (HS with both dimples and slot) were compared to select the best configuration. The effect of heat flux (700≤q ̇≤1900)  on average temperature of radial heat sink was investigated. It was found that for all three models, the temperature difference between the HS and the ambient air of the fluid domain linearly increased with heat flux. At q ̇=1900W/m2 , when compared to Type A (HS with plain fins), Type C (HS with slot and dimples) models offered the best cooling performance, followed by Type B where the mass and average temperature of the heat sink is reduced by 13.7% and 5.1%, 8.3% and 1%, respectively.

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Author Biographies

Ibrahim Ademola Fetuga, Department of Mechanical Engineering, University of Lagos – Akoka. Yaba-Lagos, Nigeria

 Fetuga Ibrahim Ademola is a research scholar at university of Lagos. He had a National Diploma in Marine Engineering at Federal College of Fisheries and Marine Technology, Nigeria. He obtained his BEng in Petroleum Engineering from University of Benin, MSc in Occupational Health and Safety Management from South America University, MSc in Mechanical Engineering from University of Lagos, and Post-graduate National Diploma in Petroleum Geoscience from Laser Centre of Petroleum Geoscience, Nigeria

Olabode Thomas Olakoyejo, Department of Mechanical Engineering, University of Lagos – Akoka. Yaba-Lagos, Nigeria

Olakoyejo Olabode has expertise in computational heat transfer/fluid flow with application of heat generating equipment at Macro, Micro and Nano-scale levels using constructal theory, design and optimization which are critical to the modern technology and development. Also, he is into renewable energy such as biomass and solar due to the challenge of the electricity problem in Nigeria despite the abundant of sun in Africa particularly Nigeria. He is currently working as a Senior Lecturer at University of Lagos, where he teaches, researches and practices Mechanical Engineering. Also, he is Principal Investigator of Royal Society Research Laboratory, University of Lagos. He got his Ph.D. degree in Mechanical Engineering at University of Pretoria, South Africa, He was once a visiting Scholar (Spring, 2016) on MIT-Empowering the Teachers (MIT-ETT) fellowship, Massachusetts Institute of Technology (MIT), United States of America. He has attended and presented at different international conference. He is a member of different professional bodies, including: American Society of Mechanical Engineers (ASME), South African Institution of Mechanical Engineers, Nigerian Institution of Mechanical Engineers, Council for the Regulation of Engineering in Nigeria (Registered Engineer, COREN) and Nigerian Society of Engineers.

Adekunle Omolade Adelaja, Department of Mechanical Engineering, University of Lagos – Akoka. Yaba-Lagos, Nigeria

Dr. Adekunle adelaja is an Associate Professor of Mechanical Engineering at the University of Lagos, Nigeria. He obtained his B.Sc., M.Sc., and Ph.D. degrees in Mechanical Engineering from the Obafemi Awolowo University, the University of Ibadan, and University of Lagos, Nigeria, in 1995, 1998, and 2012 respectively. He was a Postdoctoral Fellow at the University of Pretoria (Clean Energy Research Group), South Africa, between 2012 and 2014, where he worked on flow condensation in inclined tubes. he was a Visiting Scholar at the Massachusetts Institute of Technology in 2015. His research eares are Two-phase flow in inclined tubes, convective heat transfer, vibration and energy studies.

Joshua Kolawole Gbegudu, Department of Mechanical Engineering, University of Lagos – Akoka. Yaba-Lagos, Nigeria

Joshua Kolawole Gbegudu is a Research scholar at University of Lagos, He obtained his B.Eng. in Petroleum Engineering from the University of Benin in 2014, and his M.sc in Mechanical Engineering in 2020 from University of Lagos. His research interests are nanofluid, renewable energy, computational fluid dynamics, data mining, big data engineering, cloud computing and machine learning

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Published
2022-04-30
How to Cite
Fetuga, I., Olakoyejo, O., Adelaja, A., & Gbegudu, J. (2022). Heat transfer enhancement in a p-shape finned radial heat sink subjected to natural convection: Thermal significance of slot and dimples in fin. ITEGAM-JETIA, 8(34), 12-19. https://doi.org/10.5935/jetia.v8i34.804
Issue
v.8 n.34 2022
Section
Articles
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