Numerical Study of Droplet Impact Liquid Film with MRT-LB Pseudo-potential Model

doi:10.19596/j.cnki.1001-246x.7985

Abstract

Abstract: An improved LB pseudo-potential multi-relaxation multiphase model is used to study flow characteristics of single/dual droplets impacting liquid film. Development of liquid film impacted by a single droplet under different gas-liquid density ratio was investigated. It was found that with decrease of density ratio, top of coronal crown started bending inward, and bottom radius is significantly reduced. Then, double droplets impinging on liquid film was studied with large density ratio. It shows that a central jet was generated as double droplets impacting on liquid film. Increase of horizontal spacing between droplets delaied the appearance of central jet and reduced height of the initial central jet. With the increase of Re, height of the central jet increased obviously.

Key words: multiphase, lattice Boltzmann method, droplet impact, liquid sheet

CLC Number:

O351.2

LIAN Xiaolong, CHEN Yue, LI Peisheng, ZHANG Ying, LI Wei, LIU Qiang. Numerical Study of Droplet Impact Liquid Film with MRT-LB Pseudo-potential Model[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2020, 37(1): 79-87.

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