2015/07/23 by Ehsan Fattahi, Christian Waluga, Fattahi, Ehsan +5
Computer Science · Engineering · #Advanced Mathematical Modeling in Engineering #Computational Engineering #FOS: Computer and information sciences #Finance #Generative Adversarial Networks and Image Synthesis #Heat and Mass Transfer in Porous Media #Lattice Boltzmann Simulation Studies #and Science (cs.CE)
paper · pdf · doi:10.48550/arxiv.1507.06565
openalex publication_date 2015/07/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this work, we investigate the interaction of free and porous media flow by\nlarge scale lattice Boltzmann simulations. We study the transport phenomena at\nthe porous interface on multiple scales, i.e., we consider both,\ncomputationally generated pore-scale geometries and homogenized models at a\nmacroscopic scale. The pore-scale results are compared to those obtained by\nusing different transmission models. Two-domain approaches with sharp interface\nconditions, e.g., of Beavers--Joseph--Saffman type, as well as a single-domain\napproach with a porosity depending viscosity are taken into account. For the\npore-scale simulations, we use a highly scalable communication-reducing scheme\nwith a robust second order boundary handling. We comment on computational\naspects of the pore-scale simulation and on how to generate pore-scale\ngeometries. The two-domain approaches depend sensitively on the choice of the\nexact position of the interface, whereas a well-designed single-domain approach\ncan significantly better recover the averaged pore-scale results.\n