This paper investigated the relationship between heat sink geometry and heat dissipation efficiency in passive cooling systems. While traditional approaches emphasize maximizing surface area, this analytical study demonstrated that the convective heat transfer coefficient was equally critical. By comparing four distinct geometries (Flat Plate, Straight Fins, Pin Fins, and Wavy Fins), the thermal boundary layer effects and air flow dynamics were analyzed. The results indicated that geometries inducing micro-turbulence, such as pin fins, outperformed densely packed straight fins despite having a smaller total surface area. These findings aligned with modern patent trends, which have shifted toward non-linear and fractal heat sink designs.
Niyaz Zhussip (Tue,) studied this question.