摘要
本文针对矩形微通道内单相流动和传热特性,利用CFD模拟分析软件对其进行三维数值模拟研究。微矩形通道宽为50μm,高为200μm,工质采用去离子水。模型以有限体积法离散,SIMPLEC方法求解速度、压力和温度耦合方程组。讨论了流体热物性随温度变化和雷诺数对速度场和温度场的影响。并与理论预测值、参考文献值比较。分析结果显示,流体粘度随温度对fRe的影响和粘性耗散对热起始段的作用不能忽略。fRe数随Re数的增加而减小,Nu数不受Re数的变化影响。
This paper investigated the behaviors of flow and heat transfer of single-phase in rectangular microchannels with three-dimensional numerical analysis.The single microchannel is 200 μm deep,50 μm wide.Deionized water was used as the working fluid.The fluid physical properties varing with temperature and Re number were studied.Comparisons were made for the numerical simulations results,convectional correlations,and data from the literature.The steady,laminar flow and transfer equations were solved using a finite-volume method.It was found that influence of viscosity-variation with temperature and viscous dissipation effect could be too significant to be neglected.
出处
《节能技术》
CAS
2008年第2期103-106,139,共5页
Energy Conservation Technology
基金
河南省基础与前沿技术研究计划项目
编号:072300440010
关键词
单相流体
矩形微通道
物性变化
数值模拟
single-phase fluid
rectangular microchannel
temperature-dependent property
numerical analysis
