论文标题
用于模拟异质多孔介质中的多相流的均质晶格玻尔兹曼模型
Homogenized Lattice Boltzmann Model for Simulating Multi-Phase Flows in Heterogeneous Porous Media
论文作者
论文摘要
提出了一种新的均质化方法，以模拟异质多孔介质中的多相流。它基于晶格Boltzmann方法，并将灰度与多组分Shan-chen方法相结合。因此，它模仿流体流体和固体流体相互作用也小于数值离散化的孔。该模型已成功测试了各种各样的单相流量问题。此外，使用逼真的3D锂离子电池电极微结构的电解质填充过程证明了其在多孔介质中的多尺度和多相流量问题的应用。新方法比文献中的可比方法显示出优势。界面张力和润湿条件是独立的，不受均匀化的影响。此外，即使在多孔介质的界面之间，这里研究的所有物理特性都是连续的。该方法与原始的多组分Shan-chen方法一致。它是准确，高效，易于实施的，可以应用于许多研究领域，尤其是在异质和多尺度多孔介质中发生多阶段流体流量的情况下。
A new homogenization approach for the simulation of multi-phase flows in heterogeneous porous media is presented. It is based on the lattice Boltzmann method and combines the grayscale with the multi-component Shan-Chen method. Thus, it mimics fluid-fluid and solid-fluid interactions also within pores that are smaller than the numerical discretization. The model is successfully tested for a broad variety of single- and two-phase flow problems. Additionally, its application to multi-scale and multi-phase flow problems in porous media is demonstrated using the electrolyte filling process of realistic 3D lithium-ion battery electrode microstructures as an example. The new method shows advantages over comparable methods from literature. The interfacial tension and wetting conditions are independent and not affected by the homogenization. Moreover, all physical properties studied here are continuous even across interfaces of porous media. The method is consistent with the original multi-component Shan-Chen method. It is accurate, efficient, easy to implement, and can be applied to many research fields, especially where multi-phase fluid flow occurs in heterogeneous and multi-scale porous media.
