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首页> 外文会议>Micro/Nanoscale Heat Transfer International Conference 2008 >EFFECT OF AXIAL HEAT CONDUCTION ON HEAT TRANSFER IN TRIANGULARSILICON MICROCHANNELS
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EFFECT OF AXIAL HEAT CONDUCTION ON HEAT TRANSFER IN TRIANGULARSILICON MICROCHANNELS

机译：轴向导热对三角硅微通道传热的影响

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摘要

In order to study the fundamental physical mechanisms of fluid flow and heat transfer in microchannels, many effects should be taken into account. The effect of axial heat conduction on heat transfer in microchannels is one of the hottest topics. Experimental investigation was carried out to analyze heat transfer characteristics of methanol flowing through microchannel heat sink, which consists of 10 parallel triangular microchannels. Experimental results show that the temperature distribution on the heated wall do not change linearly along the channel, which mainly caused by the axial heat conduction in the wall. The ratio of the power due to the axial heat flux to the Joule heating in the heater, and the axial heat conduction number were used to evaluate the heat conduction effect in the wall. Many factors play important roles in the axial heat conduction, including geometric configuration, material of the wall, and Reynolds number. The experimental study reveals that the axial heat conduction effect is gradually strengthened as the Reynolds number decreases.
机译：为了研究微通道中流体流动和传热的基本物理机制，应考虑许多影响。轴向热传导对微通道中热传递的影响是最热门的主题之一。进行了实验研究，以分析流经微通道散热器（由10个平行的三角形微通道组成）的甲醇的传热特性。实验结果表明，受热壁上的温度分布沿通道并没有线性变化，这主要是由壁内的轴向热传导引起的。使用轴向热通量与加热器中焦耳加热的功率之比和轴向热传导数来评估壁中的热传导效果。许多因素在轴向热传导中起着重要作用，包括几何形状，壁的材料和雷诺数。实验研究表明，随着雷诺数的减小，轴向导热效果逐渐增强。

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