| 多孔介质单相渗流的热弥散模型 |
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| 引用本文： | 杜建华,胡雪蛟,吴伟,王补宣.多孔介质单相渗流的热弥散模型[J].机械工程学报,2001,37(7):9-11. |
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| 作者姓名： | 杜建华 胡雪蛟 吴伟 王补宣 |
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| 作者单位： | 清华大学热能工程系 |
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| 基金项目： | 国家自然科学基金资助项目 (5 9995 5 5 0 -3 ) |
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| 摘 要： | 根据流体在多孔介质内的渗流特性 ,提出了新的热弥散模型 ,成功地再现了多孔介质内单相流体对流换热时壁面区的温度分布。与以往的模型相比 ,该模型具有较少的可调经验参数。运用该模型预测的Nu数与Re数的关系与试验结果一致
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| 关 键 词： | 热弥散 渗流 多孔介质 传热 |
| 修稿时间： | 2000年8月29日 |
THERMAL DISPERSION MODEL FOR SINGLE PHASE FLOW IN POROUS MEDIA |
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| Du Jianhua Hu Xuejiao,Wu Wei Wang Buxuan.THERMAL DISPERSION MODEL FOR SINGLE PHASE FLOW IN POROUS MEDIA[J].Chinese Journal of Mechanical Engineering,2001,37(7):9-11. |
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| Authors: | Du Jianhua Hu Xuejiao Wu Wei Wang Buxuan |
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| Affiliation: | Qinghua University |
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| Abstract: | A new model for thermal dispersion is proposed based on the character of flow in porous media,which relates the dispersion with the velocity and tortuosity of t he fluid flow in pores.Compared with former similar ones,this model has fewer em pirical parameters,and therefore it is expected to be used more widely and conve niently.The temperature distributions in the nearby wall region can be successfu lly reproduced by present model when a single-phase fluid flows through a packed channel.The predictions of Nu vs. Re agree with the experimental results well |
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| Keywords: | Thermal dispersion Seepage flow Porous media Heat transfer |
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