Djeffal, FaresTahrour, FaroukBordja, LyesAkgul, AliJarrar, RababAsad, JihadMenni, Younes2024-12-242024-12-2420220354-98362334-7163https://doi.org/10.2298/TSCI22S1485Dhttps://hdl.handle.net/20.500.12604/7645In 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 <= N-w <= 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 N-w = 4 waves obtained the highest values at all Reynolds numbers in terms of the overall performance criterion (j/f(1/3)).eninfo:eu-repo/semantics/openAccessheat exchangerfinColburn factorheat transferassessmentArticle26485493Q4WOS:000916468800046Q32-s2.0-8514698751810.2298/TSCI22S1485D