期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 354, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.molliq.2022.118841
关键词
Molecular dynamics simulation; Gas shear flow; Droplet coalescence; Capillary number
资金
- Natural Science Foundation of Shandong Province, China [ZR2020MB137]
- Major Scientific and Technological Innovation Project of Shandong Province, China [2019JZZY010508]
This study presents molecular dynamics simulations of droplet collision and coalescence in shear gas flow between gold plates. The results show that parameters such as shear velocity, normal symmetry velocity, and capillary number play a crucial role in determining the behavior of the droplets.
Molecular dynamics (MD) simulations of droplet collision and coalescence in shear gas flow between gold plates were presented. The shear velocity, normal symmetry velocity and splitting phenomenon of gas were studied through the statistical analysis of gas molecular velocities. The normal symmetric velocity is the average velocity of the gas molecules moving symmetrically away from the plates in the normal direction. The change of adsorptive layers of gas molecules on solid plates with plate velocity was investigated by analyzing the density distribution of gas molecules. Capillary number and initial offset are the main parameters affecting droplet coalescence. By changing these two parameters, three main droplet collision results were obtained: coalescence, temporary bridge formation and sliding. The non-bonded interactions between droplets in various collision results were investigated and it was found that they can well correspond to the interface change processes. The regime diagrams were established to study the relationship between different results and parameters. Our study provides a new idea for further understanding of droplet coalescence in gas shear flow.CO 2022 Elsevier B.V. All rights reserved.
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