The wettability mechanism of soil–water interfaces is of significant importance in geotechnical engineering. However, the effect of different contact angles on unsaturated sand soil behavior has been less understood. In this study, the wetting behavior of nano water droplets on various silica substrates is investigated using molecular dynamics. Seventeen groups of simulation systems with different interaction potential energies (, 0.04, 0.2, 0.4, 0.6, 0.8, 1, 2 kcal/mol) and temperatures (, 298, 323, 353 K) are conducted. The results show that the contact angles varies intensively with interaction potential energies from 108.5° to 18.1°, which indicates a transition from hydrophobic to hydrophilic and wettability enhancement along with the increase of interaction potential energy. Simulation results also show that contact angles increase with the increase of temperature, whatever the hydrophobic or hydrophilic of the silica surface. Such phenomena are interpreted from the perspective of microstructure, along with the performance of macrostructure. In addition, results show that the contact angles are independent of the thickness and width (length) of silica substrate.
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Accepted:
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Jiaxiang Luo 1; Yihe Xu 2; Yu Zhong 3; Jidong Teng 3; Wen Yao 1; Lei Hao 4; Chenlei Kang 5
@article{CRMECA_2021__349_3_485_0, author = {Jiaxiang Luo and Yihe Xu and Yu Zhong and Jidong Teng and Wen Yao and Lei Hao and Chenlei Kang}, title = {Molecular dynamics analysis of wetting behavior of nano water drops on quartz sand~surface}, journal = {Comptes Rendus. M\'ecanique}, pages = {485--499}, publisher = {Acad\'emie des sciences, Paris}, volume = {349}, number = {3}, year = {2021}, doi = {10.5802/crmeca.95}, language = {en}, }
TY - JOUR AU - Jiaxiang Luo AU - Yihe Xu AU - Yu Zhong AU - Jidong Teng AU - Wen Yao AU - Lei Hao AU - Chenlei Kang TI - Molecular dynamics analysis of wetting behavior of nano water drops on quartz sand surface JO - Comptes Rendus. Mécanique PY - 2021 SP - 485 EP - 499 VL - 349 IS - 3 PB - Académie des sciences, Paris DO - 10.5802/crmeca.95 LA - en ID - CRMECA_2021__349_3_485_0 ER -
%0 Journal Article %A Jiaxiang Luo %A Yihe Xu %A Yu Zhong %A Jidong Teng %A Wen Yao %A Lei Hao %A Chenlei Kang %T Molecular dynamics analysis of wetting behavior of nano water drops on quartz sand surface %J Comptes Rendus. Mécanique %D 2021 %P 485-499 %V 349 %N 3 %I Académie des sciences, Paris %R 10.5802/crmeca.95 %G en %F CRMECA_2021__349_3_485_0
Jiaxiang Luo; Yihe Xu; Yu Zhong; Jidong Teng; Wen Yao; Lei Hao; Chenlei Kang. Molecular dynamics analysis of wetting behavior of nano water drops on quartz sand surface. Comptes Rendus. Mécanique, Volume 349 (2021) no. 3, pp. 485-499. doi : 10.5802/crmeca.95. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.95/
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