期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：237
期号：5
页码：052014
DOI：10.1088/1755-1315/237/5/052014
出版社：IOP Publishing
摘要：A practical procedure was used to study the plugging process of particles in ultrafine capillaries with bore sizes ranging from 10 to 20 μm and lengths from 10 mm to 40 mm under pressure differences from 60 to 400 kPa. The results show that the particle plugging in capillary is a popular phenomenon and plugging process is of great uncertainties. The ultrafine capillary could be plugged completely under a certain pressure difference after a long period aerosol exposure, and the plugging position was diagnosed to be at or near the leak path entrance. It was believed that pressure difference might play a special role in plugging situation as well as compactness of the deposit. In many cases, the deposit was not firm enough, and could be re-suspended. The possibility of complete plugging decreases gradually with the increase of the capillary bore, but partly plugging and unplugging of the capillary may occur repeatedly.
