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1.
  • Berre, I., et al. (author)
  • Verification benchmarks for single-phase flow in three-dimensional fractured porous media
  • 2021
  • In: Advances in Water Resources. - OXFORD ENGLAND : Elsevier BV. - 0309-1708 .- 1872-9657. ; 147
  • Journal article (peer-reviewed)abstract
    • Flow in fractured porous media occurs in the earth's subsurface, in biological tissues, and in man-made materials. Fractures have a dominating influence on flow processes, and the last decade has seen an extensive development of models and numerical methods that explicitly account for their presence. To support these developments, four benchmark cases for single-phase flow in three-dimensional fractured porous media are presented. The cases are specifically designed to test the methods’ capabilities in handling various complexities common to the geometrical structures of fracture networks. Based on an open call for participation, results obtained with 17 numerical methods were collected. This paper presents the underlying mathematical model, an overview of the features of the participating numerical methods, and their performance in solving the benchmark cases.
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2.
  • Endo Kokubun, M. A., et al. (author)
  • A pore-scale study of transport of inertial particles by water in porous media
  • 2019
  • In: Chemical Engineering Science. - : Elsevier. - 0009-2509 .- 1873-4405. ; 207, s. 397-409
  • Journal article (peer-reviewed)abstract
    • We study the transport of inertial particles in water flow in porous media. Our interest lies in understanding the accumulation of particles including the possibility of clogging. We propose that accumulation can be a result of hydrodynamic effects: the tortuous paths of the porous medium generate regions of dominating strain, which favour the accumulation of particles. Numerical simulations show that essentially two accumulation regimes are identified: for low and for high flow velocities. When particles accumulate at the entrance of a pore throat (high-velocity region), a clog is formed. This significantly modifies the flow, as the partial blockage of the pore causes a local redistribution of pressure, which diverts the upstream water flow into neighbouring pores. Moreover, we show that accumulation in high velocity regions occurs in heterogeneous media, but not in homogeneous media, where we refer to homogeneity with respect to the distribution of the pore throat diameters.
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