Calculation of the diffusion coefficient of gas diffusion in coal: The comparison of numerical model and traditional analytical model

The prediction and calculation of the gas diffusion coefficient in a coal matrix is a key scientific issue in the study of gas diffusion behavior in coal. Due to its inherent shortcomings, the diffusion coefficient obtained from analytical models and widely used in academia does not fully reflect the gas diffusion law in actual coal seams. Therefore, numerical models have received increasing attention because they consider the actual conditions...