Convective Heat Transfer of Heat Sinks With Partially Cut Plate Fins and Turning of Their Cut Sections

Abstract

Plate-fin heat sinks are widely used for cooling radio electronic, power electronic, and telecommunication components. The current trends in the development of radio and microelectronic systems dictate the need to dissipate large heat fluxes. The present article uses the methods of numerical simulation, verified by experimental data, to study convective heat transfer of different-type heat sinks with partially cut plate fins. The heat sink with partially cut plate fins served as the basis of study. Three types of heat sinks with extended surfaces were also considered. First, we analyzed the fin cut section turned at an angle of 30° and then - the fin cut section with diverging or converging shape. Comparing the thermal and hydraulic performance of such heat sinks showed that the thermal and hydraulic performance of heat sinks with a fin cut section with diverging shape at a turning angle of 30° is by 10% higher than that of heat sinks with partially cut plate fins. As the velocity distribution in the wake shows, the use of heat sinks with partially cut plate fins and turning of their cut sections for cooling real microelectronic devices needs to correctly design an installation, in which the device is located.