THERMAL SCIENCE

International Scientific Journal

Muhsen Banur Asoul

,

Kok Hwa YuORCID

,

Ali Mohammad Khaled

,

Mohd Azmi IsmailORCID

,

How Tion Puay

NUMERICAL INVESTIGATION ON HEAT TRANSFER ENHANCEMENT OF GRAPHENE COATED CIRCULAR PIN FIN

ABSTRACT
The benefit of the graphene coating is twofold. Firstly, the lower temperature on the graphene coated pin fin can be attained, thus ensuring the application system to operate at lower temperatures, preventing overheating. Secondly, the graphene coated fin could yield more uniform distribution of temperature along the pin fin, thereby producing a more uniform heat dissipation along the fin. With such a coating, an improved cooling system can be created, in alleviating the heat transfer limit of conventional heat sink. Numerical results reported in this study revealed that the graphene coating is consistently beneficial for heat dissipation for all cases investigated, regardless of the air velocity, coating thickness, and pin fin length. At the longest pin fin examined, which is 25D, the temperature difference between the base and the tip of the pin fin can be reduced to 1.70K, as compared to 10.60 K temperature difference for the conventional pin fin. Additionally, thermal resistance reduction of up to 56.60% can be attained using the graphene coating technique.
KEYWORDS
CFD, coating, conjugate heat transfer, heat sink, high heat conductivity material
PAPER SUBMITTED: 2024-11-11
PAPER REVISED: 2025-02-15
PAPER ACCEPTED: 2025-04-30
PUBLISHED ONLINE: 2025-07-05
DOI REFERENCE: https://doi.org/10.2298/TSCI241111097A
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2025, VOLUME 29, ISSUE No. 6, PAGES [4703 - 4714]
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Numerical investigation on heat transfer enhancement of graphene coated circular pin fin

© 2026 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence