河南理工大学学报（自然科学版）2025，Vol.44Issue(2)：99-107,9.DOI:10.16186/j.cnki.1673-9787.2022050041
侧壁凹槽结构微通道流动与换热特性
Flow and heat transfer characteristics of microchannel with grooves structure on sidewalls
摘要
Abstract
Objectives In order to explore the effects of grooves shape on the liquid flow and heat transfer performances in microchannel heat sink(MCHS),find an optimal groove geometry that can provide an effi-cient cooling performance with heat transfer enhancement as well as microchannel flow drag reduction,Methods an experimental study was carried out to test the fluid pressure and temperature at the microchan-nel inlet and outlet.The flow friction factor,average Nusselt number,enhanced heat transfer factor and field synergy number were used to evaluate the forced convection flow and heat transfer performances of the deionized water in the fan-shaped grooved microchannel,water droplet grooved microchannel and trapezoi-dal grooved microchannel.Furthermore,a comparison of the flow and heat transfer performances of the grooved microchannel heat sinks with that of the smooth one was promoted.Results With the increase of volume flow rate,the liquid flow pressure dropped,average Nusselt number and enhanced heat transfer fac-tor increased,while the flow friction factor,temperature increment and field synergy number decreased ac-cordingly,indicating that the pump power consumption of the liquid flow in microchannels increasesd,but its convective heat transfer performance and heat transfer efficiency were significantly improved.The liquid flow pressure drop and friction factor of the grooved microchannel are respectively lower than that of the smooth one,promoting a reduction in the pump power consumption.When the liquid flow rate was large,the heat transfer performance and heat transfer efficiency of the water droplet grooved microchannel and trapezoidal grooved microchannel were better than that of the smooth one.The heat transfer performance and heat transfer efficiency of the fan-shaped grooved microchannel were the best and the corresponding av-erage Nusselt number and enhanced heat transfer factor achieved up to 7.81 and 1.32,respectively.Con-clusions This research results could provide a reference for improving microchannel design to solve the cooling problem of very large scale integrated(VLSI)chips.关键词
微通道/凹槽/传热/努塞尔数Key words
microchannel/groove/heat transfer/Nusselt number分类
能源与动力引用本文复制引用
朱崎峰,崔阳,赵同乐,温小萍,孙好雷,和文强..侧壁凹槽结构微通道流动与换热特性[J].河南理工大学学报（自然科学版）,2025,44(2):99-107,9.基金项目
国家自然科学基金资助项目(51774115) （51774115）
河南省科技攻关项目(212102210001 （）
222102320105) （）
河南理工大学博士基金资助项目(B2015-41) （B2015-41）
国家大学生创新创业训练计划项目(202210460059) （202210460059）
