孔隙分布对多孔介质内流动和传热的影响

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余廷芳，柳阿亮，张莹*，王志强，叶文林，孙金丛

南昌大学机电工程学院，江西南昌 330031

收稿日期:2017-09-01修回日期:2017-11-03出版日期:2018-06-22发布日期:2018-06-06
通讯作者:张莹

基金资助:国家自然科学基金项目;南昌大学研究生专项资金立项项目

Effect of Pore Distribution on Flow and Heat Transfer in Porous Media

Tingfang YU, Aliang LIU, Ying ZHANG*, Zhiqiang WANG, Wenlin YE, Jincong SUN

School of Mechanical and Electrical Engineering, Nanchang University, Nanchang, Jiangxi 330031, China

Received:2017-09-01Revised:2017-11-03Online:2018-06-22Published:2018-06-06

摘要/Abstract

摘要： 采用Sierpinski地毯分形技术建立多孔介质内流动和传热模型，通过改变固体基质位置研究了孔隙分布结构对多孔介质内流动特性和热效率的影响，3种孔隙分布为每分形一次固体基质分布在中心位置(A)、分布在中上方(B)和分布在右上方(C)，当流体稳定流过多孔介质时，不同的孔隙分布表现出不同流动和传热特性. 结果表明，孔隙分布是影响多孔介质传输特性和传热效率的重要因素，无量纲渗透率k*C>k*B>k*A，多孔介质孔隙率大于0.8时更明显；流体流过不同孔隙分布的多孔介质时，相同孔隙率时与流体接触的固体基质面积A>B>C，传热效果A最佳、C最差. 孔隙分布影响了无量纲局部熵产率，在3种孔隙分布下用Be表示的热传导引起的熵产率占主导.

引用本文

余廷芳柳阿亮张莹王志强叶文林孙金丛. 孔隙分布对多孔介质内流动和传热的影响[J]. 过程工程学报, 2018, 18(3): 469-476.
Tingfang YU Aliang LIU Ying ZHANG Zhiqiang WANG Wenlin YE Jincong SUN. Effect of Pore Distribution on Flow and Heat Transfer in Porous Media[J]. Chin. J. Process Eng., 2018, 18(3): 469-476.

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