Abstract
In a recent paper, Tacher and co‐workers proposed an interesting numerical technique to generate granular porous media. In this contribution, we present a similar procedure based on a sedimentation algorithm, that is able to overcome some of the difficulties present in the former technique. These are: (a) the impossibility to choose a priori a grading curve for the generated medium while retaining a realistic stacking where each grain is connected to at least three of its neighbours, and, (b) he random pattern of the grains in the porous medium, arising from their location inside the remaining void space of a box according to an arbitrary space filling criterion. We propose to generate three‐dimensional granular media by simulating the deposition of spherical grains in a viscous fluid. We argue that the resulting chaotic grain pattern, by reflecting the actual generation process of sedimentary aggregates more closely, provides a better image of the complex topology of natural granular porous media. Although the generated medium is made up of spheres, it can be transformed, by changing the geometry of the grains through suitable domain mappings. The resulting three‐dimensional porous media provide a realistic boundary for the numerical solution of linearized Navier–Stokes equations.
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Pilotti, M. Generation of Realistic Porous Media by Grains Sedimentation. Transport in Porous Media 33, 257–278 (1998). https://doi.org/10.1023/A:1006598029153
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DOI: https://doi.org/10.1023/A:1006598029153