Multicomponent Lattice Boltzmann Simulations of Gas Transport in a Coal Reservoir with Dynamic Adsorption
Table 1
Input parameters in simulation.
Simulation domain ()
16 × 16
Temperature (K)
303.15
Reservoir pressure (MPa)
10
Pressure gradient (MPa/m)
0.1
The viscosity of methane (Pa·s)
1.39 × 10−6
Concentration at inlet (mol/m3)
0.1
Matrix porosity
0.05~0.4
The diffusion coefficient of free flow region (m2/s)
1.59 × 10−5
Knudsen diffusion coefficient (m2/s)
1.69 × 10−6
0.0016
Saturation adsorption amount (m3/t)
10~30
Adsorption rate constant (m3/(mol·s))
1.0 × 103
Desorption rate constant (/s)
3.78 × 107
Langmuir pressure (MPa)
1~4
Note that relevant parameters were selected from typical geologic exploration data of the Qinshui Basin in China [28]. The adsorption and desorption rate constants were referred from the literature [29, 30].