Modelling of fractured porous media - towards a discrete fracture model using a cell-centered MPFA finite volume scheme

November 17, 2015

Time: November 17, 2015
Lecturer: Dennis Gläser
Department of GeosciencesInstitute of Environmental Assessment and Water Research, Barcelona, Spain
Venue: Pfaffenwaldring 61, Raum U1.003 (MML), Universität Stuttgart
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In geological porous media discontinuities occur in the form of joints, fissures or faults and pose a challenge to the numerical modelling of flow and transport processes within them. However, for many applications such as geothermal energy production, shale gas extraction or CO2-storage, fractures play an important role and their accurate description by the numerical model is crucial in order to obtain meaningful results. A variety of methods targeting this problem have been developed in the past, as for example dual or multi-continuum approaches, discrete-fracture models (DFM) or the extended finite element method (XFEM).In this talk, considerations towards a cell-centered multi-point flux approximation finite-volume model for discrete fracture-matrix simulations (DFM) are presented, as well as first results for single phasic flow. The model is applicable to anisotropic heterogeneous porous media and is able to reproduce the discontinuties appearing in the solution. The fractures are modeled as (n-1)-dimensional elements coinciding with the element facets in the actual n-dimensional domain.
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