TAGRA 2024

Temperature control in electronic systems is of critical importance to ensure reliable and efficient operation of equipment. Heat sinks are widely used in these systems to improve heat transfer. Thermal performance of heat sinks is evaluated based on the principle of maximizing heat transfer rate with minimum pressure drop. In this study, in order to determine the effects of geometric properties, the thermal performances of "S-shaped" turbulators with different geometric properties were numerically investigated by analyzing the changes in Nusselt number and friction factor. The numerical analysis results showed that the "S-shaped" turbulator significantly increased heat transfer, but this increase caused a certain increase in friction factor. In particular, with the change of element height, step value and radius, Nusselt number increased significantly, and partial increases were observed in pressure drops at different values. However, when the thermal performance factor was taken into account, it was understood that the heat transfer gains obtained compensated for the increase in friction factor. In the evaluation, it was observed that the highest improvement coefficient was obtained in the model with element height of 30 mm, transverse pitch of 18 mm and element radius of 50 mm. The results obtained in this study reveal that S-shaped turbulators, when designed with optimum geometric parameters, can provide significant improvement in space-constrained applications such as compact heat sinks.