Data for: "Synthetic dataset of pore scale multiphase flow from direct numerical simulations"

This dataset provides a comprehensive collection of high-fidelity, pore-scale direct numerical simulations examining multiphase flow in porous media. The simulations systematically investigate the evolution of fluid invasion patterns as functions of pore structure heterogeneity, viscosity ratio between displacing and displaced fluids, and the wettability of the porous matrix. The dataset includes 540 individual simulation cases conducted using the OpenFOAM software. For each case, OpenFOAM input and output files are provided. The output files are provided for every simulated second and just before the invading fluid reaches the outlet, allowing detailed temporal analysis of flow governing variables such as pressure and velocity. In addition, a single visualization snapshot is included for each case, highlighting the invasion profile immediately prior to breakthrough. This dataset enables in-depth analysis of multiphase displacement phenomena, serving as a valuable resource for studying the effects of structural heterogeneity, viscosity contrast, and wettability on fluid invasion at the pore-scale. It is ideally suited for validation of machine-learning surrogate models, and also to benchmark the flows predicted other computational models like pore network models.