Study on the Solution and Algorithm of Gas-Liquid Two-Phase Transient Flow Model

To investigate the flow behavior of gas-liquid two-phase flow in pipelines, a transient two-phase flow model was developed and subjected to hydrothermal calculations. The model simulates the interactions between the gas and liquid phases and the impact of flow patterns on the flow behavior. The transient solution process of the established two-fluid model is largely consistent with the OLGA software, accurately predicting flow parameters in the pipeline, such as liquid holdup distribution and pressure drop, with prediction errors within 20%. This work provides theoretical support for pipeline design, operational management, and algorithmic innovation research.