Analysis of Slug Flow Unit Model in Rolling Vertical Tube

The slug flow unit model in rolling vertical tube was analyzed in this paper,by setting up some equations,such as mass conversation equations and the necessary conditions for the existence of slug unit model could be used as the basis for further analyzing the flow property of slug flow under rolling con-dition.flow.Based on this slug flow unit model,the correlation for calculating average void fraction of slug flow in rolling tube was presented,and the calculations were agreed well with experimental data.So,this slug flow