Simulation of a Gas-Liquid Two Phase Flow in a Vertical Pipe: Analytical-Numerical Approach

In this paper, an integral model, based on momentum balance, is developed for analyzing a gas- liquid two phase flow in a vertical pipe. This model can predict liquid flow rate and pressure distribution, using both empirical correlation governing on specific regime for two phase flow friction and numerical analysis on equation achieved from establishing equilibrium in each cell. The presented model can either predict the water or air flow rate for a given airlift system. Moreover, this method can optimize pipe diameter, volumetric flow rate, and efficiency of airlift pumps. Accuracy of this approach is greater than that of the mean void fraction model and removes some of its limitations. Results were compared with experimental data showing relatively good agreements.