Yuan , YirangSong , HuailingLi , Changfeng and Sun , Tongjun. (2020). An Upwind Mixed Finite Element Method on Changing Meshes for Positive Semi-Definite Oil-Water Displacement of Darcy-Forchheimer Flow in Porous Media. Advances in Applied Mathematics and Mechanics. 12 (5). 1196-1223. doi:10.4208/aamm.OA-2019-0256