Data for: Residual trapping of H2

Residual trapping is an important trapping mechanism that affects the efficiency of cyclic storage and withdrawal of hydrogen in geological media. In this study, we made the first attempt to conduct pore-scale modeling to investigate the effects of pore geometry and injection rate on the occurrence and percentage of residual trapping via two major mechanisms: bypassing and snap-off. We started our theoretical and numerical analyses from a single rectangular pore to understand the key controls in bypassing. We further investigated two factors on bypassing: (a) a continuous cycle of injection-extraction of H2, and (b) varied pore geometry. To understand snap-off as the other mechanism, we used a three-end single asymmetric pore. Based on our pore-scale simulations, we found that: (a) A higher pore height/width ratio (h/w) and a higher injection rate cause more residual trapping, which is unfavorable for withdrawing H2 if starting from 100% H2; (b) the trapping percentage increases with th..., The dataset contains the input files for CFD simulation of H2-water flow in dead-end pore geometry., OpenFOAM, an open-source PDE solver.