A Relation for Nanodroplet Diffusion on Smooth Surfaces
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作者:
Chu Li
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机构:The Hong Kong University of Science and Technology,Department of Mechanical and Aerospace Engineering
Chu Li
Jizu Huang
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机构:The Hong Kong University of Science and Technology,Department of Mechanical and Aerospace Engineering
Jizu Huang
Zhigang Li
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机构:The Hong Kong University of Science and Technology,Department of Mechanical and Aerospace Engineering
Zhigang Li
机构:
[1] The Hong Kong University of Science and Technology,Department of Mechanical and Aerospace Engineering
[2] Institute of Computational Mathematics and Scientific/Engineering Computing,undefined
[3] Academy of Mathematics and Systems Science,undefined
[4] Chinese Academy of Sciences,undefined
来源:
Scientific Reports
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6卷
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摘要:
In this work, we study the diffusion of nanodroplets on smooth surfaces through molecular dynamics (MD) simulations and theoretical analyses. Molecular dynamics simulations show that nanodroplet surface diffusion is different from that of single molecules and solid particles. The dependence of nanodroplet diffusion coefficient on temperature undergoes a transition from linear to nonlinear as the surface wettability is weakened due to the coupling of temperature and surface energy. We also develop a simple relation for the diffusion coefficient by using the contact angle and contact radius of the droplet. It works well for a wide range of surface wettabilities and different sized nanodroplets, as confirmed by MD simulations.