Modelling of multiple gas transport mechanisms through coal particle considering thermal effects

Multiple gas diffusion mechanisms coexist in the nanopores of coal particle, including Knudsen diffusion, slip flow and transition flow of bulk gas and surface diffusion of adsorbed gas. The contribution of each mechanism to the total gas diffusion quantity varies with gas pressure and pore radius. In this study, a coupled thermal-diffused-mechanical model was constructed considering the multiple gas transport mechanisms. The complex coupling...