Computational investigations of perforated annular fins under natural convection heat transfer

Md. Shaukat Ali; Naveen Sharma; Bhongiri Sai Ganesh

Computational investigations of perforated annular fins under natural convection heat transfer

Abstract

The cylindrical shape of objects has always been preferred by thermal engineers as a means of transferring heat, owing to their compact design and high surface-to-volume ratio. Additionally, fins were commonly used over the surface of a cylinder to enhance heat transfer even further by providing a larger surface area for heat dissipation. Therefore, this work investigates the effect of perforated annular fins, protruded from a hot vertical cylinder, on heat transfer performance due to free convection. This conjugate heat transfer study was performed for three Rayleigh numbers (Ra = 0.68 × 107, 1.37 × 107, and 1.8 × 107) in a laminar flow regime. The study involved varying numbers of fins (ranging from 3 to 7) along the cylinder height, resulting in different fin pitch to cylinder diameter ratios (S/d = 2, 2.4, 3, 4 and 5.8). The fluid flow and energy equations were solved using ANSYS Fluent to understand the correspondence between heat transfer and flow behavior. The grid dependence test and the data validation with published work were successfully performed. The Nusselt number is observed to increase with the increase in Rayleigh number, up to 41.75%, irrespective of the number and type of fins used. The heat transfer enhancements due to perforated fins are found to be higher than those without perforations. The maximum augmentation in Nusselt number is found to be 49% in case of the highest number of perforated fins as compared to solid fins, corresponding to an S/d ratio of 2 and a Ra of 1.8 × 107. Conversely, the minimum enhancement in augmented Nusselt number is 20% for an S/d ratio of 5.84 and Ra of 0.68 × 107. The flow characteristics are found to be in commensurate with the heat transfer results.

Keywords

References

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Details

Primary Language

English

Subjects

Fluid Mechanics and Thermal Engineering (Other)

Journal Section

Research Article

Authors

Md. Shaukat Ali This is me
0009-0007-6151-9008
India

Naveen Sharma ^* This is me
0000-0002-3326-1800
India

Bhongiri Sai Ganesh This is me
0009-0004-0871-6043
India

Publication Date

May 16, 2025

Submission Date

March 19, 2024

Acceptance Date

June 24, 2024

Published in Issue

Year 2025 Volume: 11 Number: 3

IZ

https://izlik.org/JA67CA65DL

Cite

RIS / Bibtex

APA

Ali, M. S., Sharma, N., & Ganesh, B. S. (2025). Computational investigations of perforated annular fins under natural convection heat transfer. Journal of Thermal Engineering, 11(3), 675-684. https://izlik.org/JA67CA65DL

AMA

1.Ali MS, Sharma N, Ganesh BS. Computational investigations of perforated annular fins under natural convection heat transfer. Journal of Thermal Engineering. 2025;11(3):675-684. https://izlik.org/JA67CA65DL

Chicago

Ali, Md. Shaukat, Naveen Sharma, and Bhongiri Sai Ganesh. 2025. “Computational Investigations of Perforated Annular Fins under Natural Convection Heat Transfer”. Journal of Thermal Engineering 11 (3): 675-84. https://izlik.org/JA67CA65DL.

EndNote

Ali MS, Sharma N, Ganesh BS (May 1, 2025) Computational investigations of perforated annular fins under natural convection heat transfer. Journal of Thermal Engineering 11 3 675–684.

IEEE

[1]M. S. Ali, N. Sharma, and B. S. Ganesh, “Computational investigations of perforated annular fins under natural convection heat transfer”, Journal of Thermal Engineering, vol. 11, no. 3, pp. 675–684, May 2025, [Online]. Available: https://izlik.org/JA67CA65DL

ISNAD

Ali, Md. Shaukat - Sharma, Naveen - Ganesh, Bhongiri Sai. “Computational Investigations of Perforated Annular Fins under Natural Convection Heat Transfer”. Journal of Thermal Engineering 11/3 (May 1, 2025): 675-684. https://izlik.org/JA67CA65DL.

JAMA

1.Ali MS, Sharma N, Ganesh BS. Computational investigations of perforated annular fins under natural convection heat transfer. Journal of Thermal Engineering. 2025;11:675–684.

MLA

Ali, Md. Shaukat, et al. “Computational Investigations of Perforated Annular Fins under Natural Convection Heat Transfer”. Journal of Thermal Engineering, vol. 11, no. 3, May 2025, pp. 675-84, https://izlik.org/JA67CA65DL.

Vancouver

1.Md. Shaukat Ali, Naveen Sharma, Bhongiri Sai Ganesh. Computational investigations of perforated annular fins under natural convection heat transfer. Journal of Thermal Engineering [Internet]. 2025 May 1;11(3):675-84. Available from: https://izlik.org/JA67CA65DL