Mathematical Simulation and program of gas-liquid two-phase well flow patternQuanhua Huang, Xingyu Lin, Yunjun He, Chengyin Wang, Yi Hu, Hongjun Ding, Jian Jiang and Jian LiE3S Web Conf., 185 (2020) 01087DOI: https://doi.org/10.1051/e3sconf/202018501087