TY - JOUR
TI - Fin twisting as a passive enhancement technique for high efficiency heat sink design
AU - Miloudi Khayra
AU - Aliouane Imane
AU - Menni Younes
AU - Bayram Mustafa
AU - Ikumapayi Omolayo M
AU - Bayode Abiodun
AU - Ting Tin Tin
AU - Özer Salih
JN - Thermal Science
PY - 2025
VL - 29
IS - 4
SP - 3179
EP - 3186
PT - Article
AB - This investigation focuses on how longitudinally twisted fins influence the  convective heat transfer and flow behavior within a 3-D aluminum heat sink.  Using a finite element-based numerical model, the influence of fin twist  angles, 10°, 15°, and 20°, was analyzed under laminar, incompressible,  steady-state water flow conditions with Reynolds numbers ranging from  500-1500. The base of the heat sink is subjected to a constant heat flux of  20000 W/m², and the resulting flow and temperature fields were examined in  detail. Velocity distributions revealed enhanced fluid mixing and vortex  generation with increasing twist angle, while surface temperature contours  and thermal gradients demonstrated improved heat removal performance.  Quantitative metrics, including average heat transfer coefficients and  Nusselt numbers, confirmed that the 20° twisted fins consistently  outperformed the lower-angle configurations, especially at higher Reynolds  numbers.