Large Scale Lattice Boltzmann Simulation for the Coupling of Free and Porous Media Flow
Large Scale Lattice Boltzmann Simulation for the Coupling of Free and Porous Media Flow
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DOI：
10.1007/978-3-319-40361-8_1
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发表时间：
2015-05
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影响因子：
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通讯作者：
E. Fattahi;C. Waluga;B. Wohlmuth;U. Rüde
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文献类型：
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作者：
E. Fattahi;C. Waluga;B. Wohlmuth;U. Rüde
在这项工作中，我们研究的相互作用的自由和多孔介质流的大规模格子玻尔兹曼模拟。我们在多尺度上研究了多孔界面的输运现象，即，我们认为，计算产生的孔隙尺度的几何形状和均匀化模型在宏观尺度。孔隙尺度的结果进行比较，通过使用不同的传输模型。具有尖锐界面条件的双域方法，例如，的Beavers-Joseph-Saffman型，以及一个单域的方法与孔隙度依赖于粘度考虑。对于孔隙规模的模拟，我们使用了一个高度可扩展的计划，一个强大的二阶边界处理。我们评论计算方面的孔隙尺度模拟和如何生成孔隙尺度的几何形状。双域方法敏感地依赖于界面的确切位置的选择，而设计良好的单域方法可以导致平均孔隙尺度结果的显著更好的恢复。
In this work, we investigate the interaction of free and porous media flow by large scale lattice Boltzmann simulations. We study the transport phenomena at the porous interface on multiple scales, i.e., we consider both, computationally generated pore-scale geometries and homogenized models at a macroscopic scale. The pore-scale results are compared to those obtained by using different transmission models. Two-domain approaches with sharp interface conditions, e.g., of Beavers–Joseph–Saffman type, as well as a single-domain approach with a porosity depending viscosity are taken into account. For the pore-scale simulations, we use a highly scalable scheme with a robust second order boundary handling. We comment on computational aspects of the pore-scale simulation and on how to generate pore-scale geometries. The two-domain approaches depend sensitively on the choice of the exact position of the interface, whereas a well-designed single-domain approach can lead to a significantly better recovery of the averaged pore-scale results.