Shan-and-Chen-type multiphase lattice Boltzmann study of viscous coupling effects for two-phase flow in porous media
Shan-and-Chen-type multiphase lattice Boltzmann study of viscous coupling effects for two-phase flow in porous media
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多孔介质中两相流粘性耦合效应的Shan-Chen型多相格子Boltzmann研究
DOI：
10.1002/fld.1972
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发表时间：
2009-09-30
影响因子：
1.8
通讯作者：
Lu, Xi-yun
中科院分区：
文献类型：
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作者：
Huang, Haibo;Li, Zhitao;Lu, Xi-yun
本文采用Shan-Chen型（SC）多相格子Boltzmann模型研究多孔介质中不混相两相流的粘性耦合效应。在该模型中，可以纳入任何典型的状态方程，并且可以通过调整“壁密度”轻松获得固体壁处气液界面的不同接触角（Benzi 等人，Phys. Rein E 2006；74（2）：021509）。研究了毛细管数、粘度比和润湿角引起的粘性耦合效应。模拟了多孔介质中密度比高达56的两相流。对于不同的粘度比和润湿性，获得了两相流模式和相对渗透率曲线作为润湿饱和度的函数。据观察，当润湿相粘度较小并覆盖固体表面时。非润湿相的相对渗透率可以大于1。在这里，SC模型被证明是研究多孔介质中不混溶两相流的合适工具，因为它简单、容易获得所需的接触角并且能够模拟高密度比的不混溶相流。版权所有 (C) 2008 约翰·威利父子有限公司
In this paper, the Shan-Chen-type (SC) multiphase lattice Boltzmann model was used to study the viscous coupling effects for immiscible two-phase flow in porous media. In the model, any typical equation of state can be incorporated and different contact angles of the gas-liquid interface at a solid wall can be obtained easily through adjusting the 'density of wall' (Benzi et al., Phys. Rein E 2006; 74(2):021509). The viscous coupling effects due to capillary number, the viscosity ratio and the wetting angle were investigated. The two-phase flows with density ratio as high as 56 in porous media were simulated. For different viscosity ratios and wettability, two-phase flow patterns and relative-permeability curves as a function of wetting saturation were obtained. It is observed that when the wetting phase is less viscous and covers the solid surface. the relative permeability of the non-wetting phase may be greater than unity. Here, the SC model is demonstrated as a Suitable tool to Study the immiscible two-phase flow in porous media because it is simple, easy to get the desired contact angle and able to simulate immiscible phase flow with high-density ratio. Copyright (C) 2008 John Wiley & Sons, Ltd.