A unified modelling and simulation for coupled anomalous transport in porous media and its finite element implementation
| Autor: | Olga Barrera |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Diffusion equation Consolidation (soil) Anomalous diffusion Applied Mathematics Mechanical Engineering Computational Mechanics Ocean Engineering Mechanics Finite element method Fractional calculus Computational Mathematics Computational Theory and Mathematics Fluid dynamics Diffusion (business) Transport phenomena |
| Zdroj: | Computational Mechanics. 68:1267-1282 |
| ISSN: | 1432-0924 0178-7675 |
| DOI: | 10.1007/s00466-021-02067-5 |
| Popis: | This paper presents an unified mathematical and computational framework for mechanics-coupled “anomalous” transport phenomena in porous media. The anomalous diffusion is mainly due to variable fluid flow rates caused by spatially and temporally varying permeability. This type of behaviour is described by a fractional pore pressure diffusion equation. The diffusion transient phenomena is significantly affected by the order of the fractional operators. In order to solve 3D consolidation problems of large scale structures, the fractional pore pressure diffusion equation is implemented in a finite element framework adopting the discretised formulation of fractional derivatives given by Grunwald–Letnikov (GL). Here the fractional pore pressure diffusion equation is implemented in the commercial software Abaqus through an open-source UMATHT subroutine. The similarity between pore pressure, heat and hydrogen transport is also discussed in order to show that it is possible to use the coupled thermal-stress analysis to solve fractional consolidation problems. |
| Databáze: | OpenAIRE |
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