Abstract
In present study, radiation and natural convection heat transfer from vertical finned heat sink is investigated numerically. Present 3D simulation is verified with available experimental data in the literature for continuous finned heat sink. The studied cases consist of 10 various configurations of interrupted, staggered and capped finned heat sink to find the optimum configuration. Heat dissipation from heat sink by the natural convection and the radiation heat transfer mechanisms are separately estimated for each case. Average temperature and mean Nusselt number on heat sink are calculated at given heat fluxes. Results show that decreasing the fin space less than 3 mm in the staggered-fins configuration does not improve cooling procedure. Also, it was observed that although Capped fins enhance the heat transfer rate, they have higher weight than regular continuous fins. Moreover, it was concluded that L-shape cut-capped fins have the lowest temperature without increasing the weight which implies the fact that they are of better performance in comparison to the other designs.
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