Flow and heat transfer characteristics of micro ribs channel with local hot spots
The development of integrated circuits has reduced the size of chips while dramatically increasing their power consumption.The heat dissipation problem of electronic devices caused ty this has become an important bottleneck restricting their rapid development.Microchannel cooling is now considered as the most promising technology to realize ultra-high heat flux dissipation.In this study,a variety of silicon-based micro ribs channel heat sinks with different rib structures are designed and prepared,and their flow and heat transfer characteristics with different hot spots are experimentally investigated and analyzed.The results show that the flow resistance of the staggered rib microchannel is lower,and its pressure drop is 22.8％lower than that of the square rib microchannel under the same Reynolds number condition.Comprehensive comparison,the staggered ribs can effectively destroy the development of the near-wall boundary layer of the fluid with lower flow loss,so that the heat sink can realize efficient cooling of higher heat flux with lower pumping power,and its COP can be increased by up to 14.1％compared with that of the square ribs microchannel.And the change of hot spot position has little effect on the maximum temperature of heat sink.
万方数据
维普
