Molecular dynamics study of water evaporation enhancement through a capillary graphene bilayer with tunable hydrophilicity
© 2018 Elsevier B.V. The rate of water evaporation as fundamental phase-change phenomenon is critically important to thermal processes in various industrial and manufacturing applications. With the development of nanotechnology, significant acceleration of evaporation rate process is now potentially...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/142185 |
| _version_ | 1826110831673212928 |
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| author | Kieu, Hieu Trung Liu, Bo Zhang, Hui Zhou, Kun Law, Adrian Wing-Keung |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Kieu, Hieu Trung Liu, Bo Zhang, Hui Zhou, Kun Law, Adrian Wing-Keung |
| author_sort | Kieu, Hieu Trung |
| collection | NTU |
| description | © 2018 Elsevier B.V. The rate of water evaporation as fundamental phase-change phenomenon is critically important to thermal processes in various industrial and manufacturing applications. With the development of nanotechnology, significant acceleration of evaporation rate process is now potentially feasible, which can lead to much higher efficiency, for example for thermal desalination. Recently, hollow and porous nanostructures have exhibited promising potential in the evaporation enhancement due to their capillary effect. However, the mechanism of water vapor transport through a capillary media at the nanoscale and the effect of surface properties remain unexplored. The present study investigates the evaporation behavior of water through the capillary channel of a vertically aligned graphene bilayer using molecular dynamics simulations, with tunable surface wettability by changing the surface charge states. The effects of both structural and environmental parameters, including the capillary channel distance and temperature, are also examined in detail. The results show that significant enhancement of evaporation occurs when the graphene bilayer is brought into contact with the water surface. It is also found that the evaporation behavior is mainly controlled by two factors, namely, the morphology of the liquid–gas interface and the interaction energy between the water molecules and the graphene layer. |
| first_indexed | 2024-10-01T02:40:56Z |
| format | Journal Article |
| id | ntu-10356/142185 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:40:56Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1421852020-06-17T02:58:17Z Molecular dynamics study of water evaporation enhancement through a capillary graphene bilayer with tunable hydrophilicity Kieu, Hieu Trung Liu, Bo Zhang, Hui Zhou, Kun Law, Adrian Wing-Keung School of Civil and Environmental Engineering School of Mechanical and Aerospace Engineering Interdisciplinary Graduate School (IGS) Environmental Process Modelling Centre Nanyang Environment and Water Research Institute Engineering::Civil engineering Graphene Evaporation Enhancement © 2018 Elsevier B.V. The rate of water evaporation as fundamental phase-change phenomenon is critically important to thermal processes in various industrial and manufacturing applications. With the development of nanotechnology, significant acceleration of evaporation rate process is now potentially feasible, which can lead to much higher efficiency, for example for thermal desalination. Recently, hollow and porous nanostructures have exhibited promising potential in the evaporation enhancement due to their capillary effect. However, the mechanism of water vapor transport through a capillary media at the nanoscale and the effect of surface properties remain unexplored. The present study investigates the evaporation behavior of water through the capillary channel of a vertically aligned graphene bilayer using molecular dynamics simulations, with tunable surface wettability by changing the surface charge states. The effects of both structural and environmental parameters, including the capillary channel distance and temperature, are also examined in detail. The results show that significant enhancement of evaporation occurs when the graphene bilayer is brought into contact with the water surface. It is also found that the evaporation behavior is mainly controlled by two factors, namely, the morphology of the liquid–gas interface and the interaction energy between the water molecules and the graphene layer. MOE (Min. of Education, S’pore) 2020-06-17T02:58:16Z 2020-06-17T02:58:16Z 2018 Journal Article Kieu, H. T., Liu, B., Zhang, H., Zhou, K., & Law, A. W.-K. (2018). Molecular dynamics study of water evaporation enhancement through a capillary graphene bilayer with tunable hydrophilicity. Applied Surface Science, 452, 372-380. doi:10.1016/j.apsusc.2018.04.216 0169-4332 https://hdl.handle.net/10356/142185 10.1016/j.apsusc.2018.04.216 2-s2.0-85047247810 452 372 380 en Applied Surface Science © 2018 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Graphene Evaporation Enhancement Kieu, Hieu Trung Liu, Bo Zhang, Hui Zhou, Kun Law, Adrian Wing-Keung Molecular dynamics study of water evaporation enhancement through a capillary graphene bilayer with tunable hydrophilicity |
| title | Molecular dynamics study of water evaporation enhancement through a capillary graphene bilayer with tunable hydrophilicity |
| title_full | Molecular dynamics study of water evaporation enhancement through a capillary graphene bilayer with tunable hydrophilicity |
| title_fullStr | Molecular dynamics study of water evaporation enhancement through a capillary graphene bilayer with tunable hydrophilicity |
| title_full_unstemmed | Molecular dynamics study of water evaporation enhancement through a capillary graphene bilayer with tunable hydrophilicity |
| title_short | Molecular dynamics study of water evaporation enhancement through a capillary graphene bilayer with tunable hydrophilicity |
| title_sort | molecular dynamics study of water evaporation enhancement through a capillary graphene bilayer with tunable hydrophilicity |
| topic | Engineering::Civil engineering Graphene Evaporation Enhancement |
| url | https://hdl.handle.net/10356/142185 |
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