Numerical study on cooling performance of hybrid micro-channel/micro-jet-impingement heat sink

This study explores the cooling performance associated with single-phase hybrid micro-channel/micro-jet-impingement cooling method. A parametric study on the geometrical and operating parameters of hybrid cooling is numerically investigated. Appreciable temperature drop on the bottom surface of the micro-channel is achieved as a result of the strong impingement effects caused by reduced diameter of jet inlets, while the temperature on the bottom surface of the micro-channel increases with increasing the number of jet inlets due to weak impingement effects. The results also show that mean convective heat transfer coefficient of bottom wall can be achieved up to 11152 W/m²K using five jet inlets with diameter of 0.19 mm each.