At present

air cooling technology is unable to meet the needs of high-heat-flux electronic devices. Liquid cooling technology has received increasing attention. As a type of liquid cooling technology

jet impingement liquid cooling primarily use nozzles to jet the working fluid directly to the solid surface

thereby improving the heat dissipation performance. The ratio of the jet area

the number of nozzles

and the influence of micro-channels are systematically discussed in this study

which can provide guidance for the optimization of such heat sinks. Simulation results show that the optimal ratio of the jet area is 0.14

in which the average temperature

pressure loss

Nusselt number

and heat transfer coefficient of the heat sink are 55.8 °C

5.35 kPa

28.1

and 3.45 kW/ (m2·K)

respectively. The optimal number of nozzles is 4

in which the average temperature

pressure loss

Nusselt number

and heat transfer coefficient of the heat sink are 51.4 °C

5.52 kPa

35.2

and 4.33 kW/ (m2·K)

respectively. In addition

hot spots can be eliminated in this condition. Moreover

the arrangement of the micro-channel decreases from 57.4 °C to 47.1 °C

and the Nusselt number and heat transfer coefficient increase from 35.2 and 4.33 kW/ (m2·K) to 43.4 and 5.32 kW/(m2·K)

respectively. The pressure loss increases slightly (approximately 50–70 Pa). With an increase in micro-channels

the overall heat transfer performance of the heat sink is significantly enhanced.