摘要
微通道散热器具有体积小、流速小、压降小、散热高等优点,随着工业微型化的发展,微型散热器的应用越来越广泛.已有的研究表明,微通道的散热性能主要决定于微通道的几何参数和流体的流动情况,相对于三角形和梯形结构,矩形微通道具有更好的散热性能.基于ANSYS Workbench有限元软件,对长度为40 mm,不同截面尺寸的单通道内流体流动及传热性能进行了数值模拟,给出具有较小压降、较大散热效率的微通道尺寸.对优化后的模型计算分析,在一定流体流速和温度的初始状态下,基底给一定热通量,经过计算,散热器可运输的热通量较高,压降较低,热传递效率较大,散热器具有良好的工作性能.
Micro-channel heat sinks have the advantages of small volume, low flow velocity and high heat transfer efficiency. With the rapid development of miniaturization industry, micro heat sinks are widely used. Previous studies have shown that the micro-channel＇ s heat transfer performance is mainly dependent on its geometric and flow conditons, and compared with tri- angle and trapezoid shapes, rectangle structures have better thermal transfer performance. Based on the fmite element software ANSYS Workbench, micro-channel heat sinks with a length of 40 inm and different cross-sectional dimensions were analyzed numerically, to give the optimal micro-channel dimensions with small pressure drop but high heat transfer efficiency. Simulation of the optimized micro-channel shows, given an initial temperature, a mass velocity and a substrate heat flux, a heat flux can be dissipated with a pressure drop down to 230.2 Pa and a heat transfer capacity up to 5.254 W, promising good working performance.
出处
《应用数学和力学》
CSCD
北大核心
2014年第3期278-286,共9页
Applied Mathematics and Mechanics
基金
云南省应用基础研究重点项目(2007A0015Z)
关键词
矩形微通道
压降
热通量
热传递效率
数值模拟
rectangular micro-channel
pressure drop
heat flux
heat transfer efficiency
numerical simulation
