The effect of foreign particles on liquid film evaporation at the nanoscale: A molecular dynamics simulation
Q Cao and YJ Chen and W Shao and XT Ma and C Zheng and Z Cui and Y Liu and B Yu, JOURNAL OF MOLECULAR LIQUIDS, 319, 114218 (2020).
The evaporation process is closely related to industrial production. By adding foreign particles to the single liquid to facilitate the evaporation process, and the effect of foreign particles is studied via molecular dynamics simulation. In this paper, the effects of the energy parameter and volume fraction are investigated absolutely. Firstly, the foreign particles with an energy parameter coefficient of 0.50-1.00 can enhance the evaporation. Then, when the energy parameter coefficient is less than 1.00, increasing the volume fraction can enhance the evaporation. In contrast, when the energy parameter is greater than 1.00, increasing the volume fraction will suppress the evaporation. The decrease in the latent heat of evaporation caused by the increase of potential energy among liquid atoms is the main reason for the enhancement of the evaporation process. The self-diffusion coefficient and radial distribution function can also reveal the mechanism of evaporation enhancement caused by energy parameters and volume fractions to a certain extent. Moreover, the energy parameter and volume fraction can only change within a specific range; otherwise, the vapor film will be generated, which significantly weakens the evaporation and ultimately changes the phase transition mode. Finally, to maximize the evaporation process by adding foreign particles in this study, the optimal energy parameter coefficient and volume fraction are chosen as 0.50 and 30%, respectively. (C) 2020 Elsevier B.V. All rights reserved.
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