Boundary scheme for lattice Boltzmann modeling of micro-scale gas flow in organic-rich pores considering surface diffusion*

Project supported by the Strategic Program of Chinese Academy of Sciences (Grant No. XDB10030400), the Hundred Talent Program of Chinese Academy of Sciences (Grant No. Y323081C01), and the National Natural Science Foundation of China (Grant No. 51439008).
Zuo Hong1, 2, Deng Shou-Chun1, †, Li Hai-Bo1
       

Relationship between the normalized apparent permeability and Langmuir constant b for different values of model size H and surface diffusivity Ds: Ds = 10–8 m2/s (brown), 10–7 m2/s (purple), 10–6 m2/s (blue), 5 × 10–6 m2/s (green), 10–5 m2/s (red). Other parameters are ∇ p = 0.1 MPa/m, pout = 20 MPa, and qsat = 4000 mol/m3.