A new boundary scheme for simulation of gas flow in kerogen pores with considering surface diffusion effect

Lingquan Wang, Zhong Zeng, Liangqi Zhang, Long Qiao, Yi Zhang and Yiyu Lu

Physica A: Statistical Mechanics and its Applications, 2018, vol. 495, issue C, 180-190

Abstract: Navier–Stokes (NS) equations with no-slip boundary conditions fail to realistically describe micro-flows with considering nanoscale phenomena. Particularly, in kerogen pores, slip-flow and surface diffusion are important. In this study, we propose a new slip boundary scheme for the lattice Boltzmann (LB) method through the non-equilibrium extrapolation scheme to simulate the slip-flow considering surface diffusion effect. Meanwhile, the second-order slip velocity can be taken into account. The predicted characteristics in a two-dimensional micro-flow, including slip-velocity, velocity distribution along the flow direction with/without surface diffusion are present. The results in this study are compared with available analytical and reference results, and good agreements are achieved.

Keywords: Slip-flow; Surface diffusion; Lattice Boltzmann method (search for similar items in EconPapers)
Date: 2018
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:495:y:2018:i:c:p:180-190

DOI: 10.1016/j.physa.2017.12.028

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