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- W3125303363 abstract "Abstract Mixed-dimensional elliptic equations exhibiting a hierarchical structure are commonly used to model problems with high aspect ratio inclusions, such as flow in fractured porous media. We derive general abstract estimates based on the theory of functional a posteriori error estimates, for which guaranteed upper bounds for the primal and dual variables and two-sided bounds for the primal-dual pair are obtained. We improve on the abstract results obtained with the functional approach by proposing four different ways of estimating the residual errors based on the extent the approximate solution has conservation properties, i.e.: (1) no conservation, (2) subdomain conservation, (3) grid-level conservation, and (4) exact conservation. This treatment results in sharper and fully computable estimates when mass is conserved either at the grid level or exactly, with a comparable structure to those obtained from grid-based a posteriori techniques. We demonstrate the practical effectiveness of our theoretical results through numerical experiments using four different discretization methods for synthetic problems and applications based on benchmarks of flow in fractured porous media." @default.
- W3125303363 created "2021-02-01" @default.
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- W3125303363 date "2022-10-21" @default.
- W3125303363 modified "2023-09-23" @default.
- W3125303363 title "<i>A posteriori</i> error estimates for hierarchical mixed-dimensional elliptic equations" @default.
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- W3125303363 doi "https://doi.org/10.1515/jnma-2022-0038" @default.
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