TY - JOUR
TI - Three-dimensional assessment of thermal-hydraulic behaviour in heat exchangers fitted by wavy annular fins
AU - Djeffal Fares
AU - Tahrour Farouk
AU - Bordja Lyes
AU - Akgül Ali
AU - Jarrar Rabab
AU - Asad Jihad
AU - Menni Younes
JN - Thermal Science
PY - 2022
VL - 26
IS - 101
SP - 485
EP - 493
PT - Article
AB - 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).