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- W2182284910 abstract "Numerical simulation of flow of two or three mutually interactive phases is a standing challenge for model developers and practitioners. Applying such flow models in the context of fractured rock, an extreme case of heterogeneity, further increases the complexity of the problem. Depending on the rigor of the coupling of flow and transport equations and the geometric description of the fractured-rock domain, problems such as these quickly become at best computationally burdensome, and at worst completely intractable. In this paper, we describe a mesh generator that spatially discretizes a porous medium and network of discrete, orthogonal fractures and provides influence coefficients for fracturefracture, matrix-matrix, fracture-matrix, and asperity contact-bridged matrix-matrix flow. We demonstrate an application of this non-uniform spatial mesh in the numerical model CompFlow Bio (a multi-component, three-phase flow and transport simulator) in the real-world context of the Santa Susana Field Laboratory site (a site of trichloroethylene (TCE) contamination in fractured sandstone). We provide demonstration simulations of TCE source evolution via a series of three simulations: two smaller-scale (~10 m) air/water/TCE simulations in a near-surface zone; and one larger-scale (~100 m) water/TCE simulation below the water table. The physical processes we consider are capillary barriers to water and TCE flow in the vadose zone, asperity contact bridged flow, and fast preferential flow in the fracture network. All of these processes are parameterized in the model by quantities that could be derived from real site data. Finally, we touch on the computational burden of these various scenarios and contrast meshes of this scheme to conventional finite volume grids." @default.
- W2182284910 created "2016-06-24" @default.
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- W2182284910 date "2012-01-01" @default.
- W2182284910 modified "2023-10-18" @default.
- W2182284910 title "NUMERICAL SIMULATION OF DNAPL SOURCE ZONES ABOVE AND BELOW THE WATER TABLE IN FRACTURED SANDSTONE" @default.
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