Cutting fins of the plate heat sinks into multi-numbers of slides instead of one slide
fin is a technique to improve the performance of the heat sink. One, two, three, and
four slides have been studied numerically. The slides have been arranged in staggered arrangement. The study has been carried out on two different flow directions
(impinging and parallel). The performance of the heat sink under the studied conditions has been represented through calculation of heat sink effectiveness, thermal
resistance, pressure drop, pumping power, and Nusselt number. The studied range
of Reynolds number is from 1333 to 5334. The results show that parallel flow gives
lower thermal resistance than impinging flow for all studied cases. The pumping
power required for high Reynolds number in case of parallel flow increases by
around 155% with Case 4 (four slides) as compared by Case 1 (one slide), while
it is slightly affected in case of impinging flow. Using three slides with impinging
flow represents an acceptable decrement in thermal resistance with low change in
the required pumping power. In case of parallel flow, the resulting change in the
heat sink performance, as the number of slides increases, is not proportional to the
large increase in the pumping power. |
