Published 2025-01-19
Keywords
- Rib,
- Heat transfer enhancement,
- perforated ribs
Copyright (c) 2025 Samarra Journal of Engineering Science and Research
This work is licensed under a Creative Commons Attribution 4.0 International License.
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Abstract
This work investigates the influences of ribs and perforated ribs on heat transfer in square channels. The circular perforated rib was selected in this work. The study theoretically analyses parameters of the thermal performance, which includes Nusselt number, heat transfer rate, and air temperature distributions along the duct centreline for different loads and Reynolds numbers. The results indicated that by using the ribs in the channel, the heat transfer rate, heat transfer coefficient, and Nusselt number increased. The heat transfer rate, heat transfer coefficient, and Nusselt number also increase with using holes in ribs compared with that of the solid one. The reason for the increase in heat transfer is due to an increase in turbulence and thermal surface area. Moreover, it is observed changing shapes of the perforated ribs affect the parameters of heat transfer performance. The percentage of increase and improvement in heat transfer for solid ribs was (11.11%, 14.4%, and 12.5%) respectively. As for perforated ribs, the percentages of Nusselt number, convection coefficient, and heat transfer rate improved by (16.9%, 19.7%, and 17.2%) respectively, to a Reynolds number of 32051.
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