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Fluid flow and heat transfer over corrugated backward facing step channe


Abu Talib, Abd. Rahim and Hilo, Ali Kareem (2021) Fluid flow and heat transfer over corrugated backward facing step channe. Case Studies in Thermal Engineering, 24. art. no. 100862. pp. 1-29. ISSN 2214-157X


The convective heat transfer and flow field characteristics through a backward-facing step (BFS) channel combined with a corrugated wall is investigated numerically and experimentally. Uniform heat flux is applied on 200 mm of the downstream wall, while the rest of the walls are considered isolated surfaces. The range of Reynolds number (Re) of the flow was between 5000 and 20,000. The governing equations were solved using the RNG turbulent model. The effects of wavelength and amplitude height of the corrugated wall on the friction factor and Nusselt number are studied. The results indicated that the fluid flow in the BFS channel combined with the corrugated wall significantly enhanced the heat transfer with increased friction. The average increase in the heat transfer rate and friction factor in the experiment is 40.7% and 46.2% respectively. The simulation results are comparable to the experimental ones. According to the simulations, the channel with an amplitude height of 4 mm and a wavelength of 20 mm has the highest heat transfer enhancement, reaching a performance evaluation criterion factor of 1.33 at 5000 Re.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1016/j.csite.2021.100862
Publisher: Elsevier
Keywords: Backward-facing step; Corrugation; Heat transfer; Turbulent flow
Depositing User: Ms. Nuraida Ibrahim
Date Deposited: 05 Sep 2022 08:43
Last Modified: 05 Sep 2022 08:43
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.csite.2021.100862
URI: http://psasir.upm.edu.my/id/eprint/97365
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