| 微管内部流动粘性耗散的实验研究与数值模拟 |
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| 引用本文： | 布文峰,刘志刚,赵耀华.微管内部流动粘性耗散的实验研究与数值模拟[J].哈尔滨工业大学学报,2008,40(1):160-163. |
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| 作者姓名： | 布文峰 刘志刚 赵耀华 |
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| 作者单位： | 中国科学院,工程热物理研究所,北京,100080;山东科学院,能源研究所,济南,250014;北京工业大学,建工学院,北京,100022 |
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| 摘 要： | 为深入了解微管内部流动及换热机理,对液体在微管内部流动引起的粘性耗散问题进行了理论分析、数值计算和实验验证.以蒸馏水为工质,流过内径为25μm及50μm微光滑石英管,采用非接触式温度测量方法——红外热成像测量液体粘性耗散导致的微管壁面的温度场变化,获得精确的微管外壁温度分布.同时利用SIMPLEC计算方法对其内部流动耗散进行了数值模拟,得到了微管内部流动雷诺数Re和流体温升的关系.实验结果与数值模拟结果相吻合,表明忽略粘性耗散的影响会最终影响微管摩擦系数和Re数的表观实验结果.
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| 关 键 词： | 微管 微尺度传热 粘性耗散 红外热像仪 非接触式温度测量 |
| 文章编号： | 0367-6234（2008）01-0160-04 |
| 收稿时间： | 2005-03-10 |
| 修稿时间： | 2005年3月10日 |
Experimental study and numerical simulation of viscous dissipation effect for flow in microtube |
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| BU Wen-feng,LIU Zhi-gang,ZHAO Yao-hua.Experimental study and numerical simulation of viscous dissipation effect for flow in microtube[J].Journal of Harbin Institute of Technology,2008,40(1):160-163. |
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| Authors: | BU Wen-feng LIU Zhi-gang ZHAO Yao-hua |
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| Affiliation: | 1.Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100080,China;2.Energy Research Institute,Shandong Academy of Sciences,Jinan 250014,China;3.College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100022,China) |
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| Abstract: | The viscous dissipation effect induced by the fluid flow in microtubes was studied from the aspects of theoretical analysis,numerical simulation and experiments.Distilled water was used as working fluid and it flowed through smooth quartz microtubes with inner diameter 25 μm and 50 μm.Infrared imaging technology was used to obtain the surface temperature distribution of microtube wall.Using SIMPLEC algorithm,the viscous dissipation effect was simulated numerically and the relationship between Re and the temperature rise was yielded.Results of the experiment agree well with those of numerical simulation,which indicates that ignoring the viscous dissipation effect could ultimately affect friction measurements and Re for flow in microtubes. |
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| Keywords: | microtube microscale heat transfer viscous dissipation infrared thermoviewer non-contact temperature measurement |
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