接触界面微通道内纳米流体流动及传热模拟研究  

Simulation of Nanofluid Flow and Heat Transfer in Contact Interface Microchannels

作　　者：周雄 朱世琰 钟莹莹 方丽萍 赵伟东 ZHOU Xiong;ZHU Shi-yan;ZHONG Ying-ying;FANG Li-ping;ZHAO Wei-dong(College of Petroleum and Chemical Engineering,Beibu Gulf University,Qinzhou,Guangxi535011,China;School of Civil Engineering and Architectural,Guizhou University of Engineering Science,Bijie Guizhou551700,China)

机构地区：[1]北部湾大学石油与化工学院,广西钦州535011 [2]贵州工程应用技术学院土木建筑工程学院,贵州毕节551700

出　　处：《贵州工程应用技术学院学报》2024年第3期35-43,共9页Journal of Guizhou University Of Engineering Science

基　　金：广西自然科学基金项目“轴向振动作用下套管段铣界面纳米钻井液渗透润滑及刀具磨损调控机制”,项目编号:2021GXNSFBA220069;贵州省教育厅高等学校科学研究项目(青年项目)“基于分布式光纤连续温度测试的水平井产出剖面解释理论研究”,项目编号:黔教技〔2022〕397号。

摘　　要：基于计算流体力学的数值仿真方法,对Al_(2)O_(3)-水纳米流体在切削接触界面微通道的层流流动与传热开展了研究,对比分析了在不同的体积分数和雷诺数下纳米流体的强制对流换热特性。结果表明:流体中纳米颗粒的加入对切削接触界面微通道的流速影响很小,但改善了流体的导热系数,造成纳米流体与壁面的对流换热效果明显,且纳米颗粒的体积分数越大,换热效果越好;换热系数和努塞尔数在雷诺数较小时(Re=0~100)随雷诺数快速增加,在雷诺数较大时(Re=100~500)随雷诺数缓慢增加,高雷诺数时的换热效果明显高于低雷诺数时;研究范围内,在相同的纳米颗粒浓度下,流体对流换热系数增加的幅度要大于纳米流体导热系数的增加幅度。Based on numerical simulation method of computational fluid dynamics,laminar flow and heat transfer of Al_(2)O_(3)-water nanofluids in cutting contact microchannels were studied.The forced convection heat transfer characteristics of nanofluids under different volume fractions and Reynolds numbers were compared and analyzed.The results show that the addition of nanoparticles to the fluid has little effect on the flow rate of the cutting contact microchannel,but improves the thermal conductivity of the fluid,resulting in better convective heat transfer effect between the nanofluid and the wall surface,and the larger the volume fraction of nanoparticles,the more obvious the heat transfer effect.The heat transfer coefficient and Nussel number increase rapidly with Reynolds number when the Reynolds number is small(Re=0~100),and slowly increase with Reynolds number when the Reynolds number is large(Re=100~500).The heat transfer effect at high Reynolds number is obviously higher than that at low Reynolds number.Under the same nanoparticle concentration,the increase of convective heat transfer coefficient of fluid is larger than the increase of thermal conductivity of nanofluid.

关 键 词：微通道 纳米流体 数值仿真 换热系数 努塞尔数 

分 类 号：TK124[动力工程及工程热物理—工程热物理]