1. The pressure drop caused by the presence of a heat sink increases with increasing Reynolds number and the attachment of a shield reinforces this tendency.
2. The attachment of a shield to a heat sink squeezes more coolant fluid into the fin-to-fin channel and enhances the thermal performance.
3. Thermal resistance decreases with increasing Reynolds number, but the effect diminishes at high Reynolds numbers. The enhancement of thermal performance by a shield is much greater at low
4. Increasing the fin height enhances the performance of the heat sink, but the effectiveness decreases with increasing Reynolds number. Increasing the fin height also decreases the height of a shield, in turn decreasing the impact of blockage on thermal resistance.