Research Information System
International Journal of Thermal Sciences, vol.215, 2025 (SCI-Expanded)
Numerical analysis and experimental verification were performed to improve heat and fluid flow in a serpentine mini-channel heat sink. The effects of employing arced channels instead of straight ones as well as obstacles, on heat transfer and fluid flow in the laminar flow were simulated numerically via the Ansys 3D software. The proposed arced channel was constructed by shifting the straight channels at its midpoint in the vertical y-direction. The resulted channel is a simple arc channel. Three shifting distances were considered in y-direction (1, 2 and 3 mm). The effects of flow obstacles (cavity, cavity-rib combinations and cavity-fin combinations) were considered, and they are all oval in shape. In addition, experiments were conducted to validate the introduced numerical study. Results show that the proposed configurations can enhanced the heat transfer and fluid flow distribution in the heat sink. The enhancements in Nusselt number were 2.3 %, 5.5 % and 9.2 % for shifting distances 1, 2 and 3 mm, respectively. In the case of using obstacles in the arced channels, the enhancements in Nusselt number were 11 %, 29 % and 50 % for cavity, cavity-rib combinations and cavity-fin combinations, respectively. Among all proposed configurations, the cavity-rib combinations with 3 mm-arced channels showed the best performance evaluation criteria equal to 1.18.