Investigation of two-phase flow in porous media using lattice Boltzmann method
Investigation of two-phase flow in porous media using lattice Boltzmann method
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DOI：
10.1016/j.camwa.2013.08.005
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发表时间：
2014-02
期刊：
影响因子：
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通讯作者：
M. Taghilou;M. Rahimian
中科院分区：
文献类型：
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作者：
M. Taghilou;M. Rahimian
本文用格子玻尔兹曼方法（LBM）研究了液滴在多孔介质中的渗透问题。采用基于Chan-Hilliard二元流体理论的Lee方法对两相流进行了数值模拟。在模拟中考虑了固相、液相和气相之间的接触角。多孔介质是通过在一个区域内随机放置方形障碍物而产生的。雷诺数、弗劳德数、韦伯数、粘度比和密度比作为影响区域的无量纲流动参数。孔隙率、达西数和孔固长度比是影响液体在多孔介质中渗透的多孔结构的无量纲特征。为了保证程序的有效性，在计算场中测试了方形液滴的释放，并根据Lee的观点模拟了液滴与固体表面之间的平衡接触角。已经提出了穿透和非吸收系数来表示液滴的穿透。数值结果表明，雷诺数、弗劳德数、孔隙率和密度比的增加会使液滴的穿透率增加，而韦伯数的增加会使液滴的散射增加。
In this paper penetration of a liquid drop in a porous media is investigated by the lattice Boltzmann method (LBM). Two-phase flow has been simulated by the Lee method which is based on the Chan–Hilliard binary fluid theory. The contact angle between solid, liquid and gas phases has been considered in the simulations. The porous medium is generated by locating square obstacles randomly in a domain. The Reynolds number, the Froude number, the Weber number, viscosity and density ratios are numbered as the non-dimensional flow parameters which influence the domain. The porosity, the Darcy number and the pore to solid length ratio are the non-dimensional characteristics of the porous structures affecting the penetration of liquid inside the porous media. To ensure the validity of the code, the release of a square drop in the computational field was tested and the equilibrium contact angle between the droplet and solid surface was modeled according to Lee. Penetration and the non-absorbed coefficient have been presented to show penetration of the drop. Investigation of numerical results showed that increasing the Reynolds number, the Froude number, porosity and density ratio will increase the penetration rate while increasing the Weber number causes scattering of the drop.