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

被引：10

作者：

Wang, Lingquan ^{[1
,2
]}

Zeng, Zhong ^{[1
,2
,3
]}

Zhang, Liangqi ^{[1
,2
]}

Qiao, Long ^{[1
,2
]}

Zhang, Yi ^{[1
,2
]}

Lu, Yiyu ^{[1
]}

机构：

[1] Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China

[2] Chongqing Univ, Dept Engn Mech, Chongqing 400044, Peoples R China

[3] Chongqing Univ, Chongqing Key Lab Heterogeneous Mat Mech, Chongqing, Peoples R China

来源：

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2018年 / 495卷

基金：

中国国家自然科学基金;

关键词：

Slip-flow; Surface diffusion; Lattice Boltzmann method; LATTICE BOLTZMANN METHOD; SHALE; PERMEABILITY; MODEL; MULTISCALE; TRANSPORT;

D O I：

10.1016/j.physa.2017.12.028

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：180 / 190

页数：11

共 28 条

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