Abstract
This article reports a theory for superior configurations of a heat spreader between a high performance disk shaped heat sink and a high density heating device. We considered three cases: (a) perimeter weighted distribution of cooling resources, (b) uniform distribution of cooling resources, and (c) center weighted distribution of cooling resources. Then, the most preferable distribution of cooling resources with same amount of cooling resource is studied. The center weighted distribution shows the highest performance for this case. The cooling performance of the heat spreader per total thermal conductance decreases with the increase in the heat spreader radius. On the other hand, the cooling performance of the heat spreader increases with the increase in the heat spreader radius. The cooling performance under the same degree of cooling in the center area increases with the increase in the heat spreader radius for perimeter weighted distribution. Furthermore, the perimeter weighted distribution is most effective due to the significant cooling resource in perimeter region. This advantage diminishes rapidly with the increase in the temperature parameter m (which is a function of the product of Biot number and Svelteness number of the heat spreader).
