International Scientific Journal


In this study, numerical studies to clarify the influence of wave number and amplitude on thermal-flow behavior of wavy annular finned-and-tube heat exchangers are described. For a range of Reynolds number from 4400 to 14300, the influence of wave amplitude, 1.5 ≤ A ≤ 4.5 mm, and wave numbers, 2 ≤ Nw ≤ 6, on forced convection heat transfer was examined. It was revealed that the wave amplitude and number have an impact on the heat flux, Colburn factor, and friction factor. The wavy annular-fins with a 3 mm amplitude and Nw = 4 waves obtained the highest values at all Reynolds numbers in terms of the overall performance criterion (j/f1/3).
PAPER REVISED: 2022-11-20
PAPER ACCEPTED: 2022-11-25
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THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Special issue 1, PAGES [485 - 493]
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© 2024 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