A numerical solution to the effects of surface roughness on water-coal contact angle.
A numerical solution to the effects of surface roughness on water-coal contact angle.
复制标题
表面粗糙度对水煤接触角影响的数值求解
DOI：
10.1038/s41598-020-80729-9
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发表时间：
2021-01-11
影响因子：
4.6
通讯作者：
Yao B
中科院分区：
文献类型：
--
作者：
Li C;Zhang J;Han J;Yao B
在煤矿生产中，煤尘对煤矿工人的健康和安全构成极大威胁。湿式除尘是有效的除尘方法之一。煤作为固体，具有不同的粗糙表面，这些粗糙表面对煤的润湿效果有一定的影响。本文以三种不同表面润湿性的煤样为研究对象。采用相场界面跟踪法模拟了粗糙表面上液滴的润湿过程。从模拟结果可以看出，粗糙界面对液滴接触角的影响符合Wenzel模型所描述的变化规律。随着粗糙度的增加，亲水性褐煤表面的接触角逐渐减小。随着粗糙度的增加，疏水焦煤的接触角逐渐增大。弱亲水性无烟煤与褐煤表面接触的变化趋势相同。由于局部和整体的差异，从数值模型得到的接触角是从Wenzel模型计算值略有不同。
Coal dust is a great threat to coal mine workers' health and safety in coal mine production. Wet dust removal is one of the effective dust removal methods. As a solid, coal has different rough surfaces, which have a certain effect on the wetting effect of coal. In this paper, three coal samples with different surface wettability are used as the research objects. Phase-field interface tracking method is used to simulate the wetting of droplets on rough surfaces. From the simulation results, it can be concluded that the influence of the rough interface on the contact angle of the droplets is in accordance with the change rule described in the Wenzel model. As the roughness increases, the contact angle of the hydrophilic lignite surface gradually decreases. As the roughness increases, the contact angle of hydrophobic coking coal gradually increases. The change trend of the contact on the surface of weakly hydrophilic anthracite coal is the same as that of lignite. Due to the local and global differences, the contact angles obtained from the numerical model are slightly different from the values calculated from the Wenzel model.
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影响因子：
9.9
作者：
Frank, Florian;Liu, Chen;Riviere, Beatrice
通讯作者：
Riviere, Beatrice
影响因子：
--
作者：
Wenzel, RN
通讯作者：
Wenzel, RN
影响因子：
--
作者：
Rivera, Rodolfo Marin;Koltsov, Alexey;Douce, Jean-Francois
通讯作者：
Douce, Jean-Francois
DOI：
10.1134/s0965542520030124
发表时间：
2020-03-01
影响因子：
0.7
作者：
Menshov, I. S.;Zhang, C.
通讯作者：
Zhang, C.
影响因子：
4.2
作者：
Stewart, Alex G.
通讯作者：
Stewart, Alex G.