Molecular Dynamics Simulation: Influence of External Electric Field on Bubble Interface in Air Flotation Process

doi:10.1007/s40242-018-8195-x

Abstract

Abstract: Molecular dynamics(MD) simulation was performed to investigate the influence of external electric field on the vapour-liquid interface of the bubble during the process of toluene separation by air flotation. The physicochemical properties of vapour-liquid interface, surface tension, probability of a hydrogen bonding near the vapour-liquid interface and the viscosity of liquid phase caused by external electric field were analyzed. The results show that the angle between the water molecule dipole moment and the normal z axis in the vapour phase changes smaller when the external electric field is applied. The surface tension and the probability of hydrogen bonding near the vapour-liquid interface increase with the increase of electric field strength. And the viscosity also increases under an external electric field. The results confirm that the external electric field has a positive effect on the performance of bubbles in air flotation, which may provide useful guidance for the combination of electric field and air flotation technology.

Key words: Molecular dynamics simulation, Vapour-liquid interface, Air flotation, Electric field, Toluene

WU Leichao, HAN Yong, ZHANG Qianrui, ZHU Lin, ZHANG Chuanxin and ZHAO Ruikuan. Molecular Dynamics Simulation: Influence of External Electric Field on Bubble Interface in Air Flotation Process[J]. Chemical Research in Chinese Universities, 2018, 34(6): 939-944.

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