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Journal of Porous Media
IF: 1.49 5-Year IF: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

ISSN Print: 1091-028X
ISSN Online: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.2019026774
pages 1627-1638


Xu Cheng
School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Yan Chen
School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Hongru Li
School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Baixue Li
School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Xi Han
School of Energy and Power Engineering, Shandong University, Jinan 250061, China
Gongming Xin
School of Energy and Power Engineering, Shandong University, Jinan 250061, China


Capillary flow in single cylindrical tubes with constant diameters (0.2 and 0.4 mm) was investigated experimentally, using alcohol as working fluid. The flow behavior was recorded by a high-speed camera in terms of height-time relationship and compared with an existing theoretical model. The experimental results illustrated good consistency with the model. Next, experiments were conducted in variable diameter tubes (expanding from 0.2 to 0.4 mm and contracting from 0.4 to 0.2 mm) and the capillary flow characteristics were analyzed. Before reaching the change point the flow showed a similar trend as that in constant diameter tubes, but it demonstrated different features after passing the change point. It was also found that the location of change point had great influence on the flow behavior.


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