Bubble Shape In Horizontal And Inclined Pipe

Horizontal and inclined pipe intermittent flow is frequently encountered in many engineering applications,such as oil industry,chemistry industry and power engineering.Further study for the flow characters of intermittent flow has important academic significance and engineering application value.The bubble shape in the intermittent flow in horizontal and inclined pipe have been studied experimentally and theoretically in the paper.An experimental facility is constructed to model bubble shape in the intermittent flow by injecting a single bubble into continuous liquid flow.The paper systematically and deeply study the bubble translation velocity and the effect of bubble length,liquid velocity,pipe inner diameter and pipe inclination on the bubbles shape.In theory,A model for the prediction of the bubble shape in horizontal and inclined pipes is proposed.The model is able to predict the flow pattern transition between plug and slug flow regimes as well as nose-tail inversion phenomenon observed in the downwardly inclined pipe.In present study,A 3-D Computational Fluid Dynamics(CFD)modeling was carried out in order to model gas–liquid two-phase flow using volume of fluid(VOF)model.The bubble shape and bubble translation in different conditions are presented.The CFD calculation shows that it is accurate to predict the bubble shape and bubble translation in different conditions.