Résolution de l’équation de transport en milieu poreux par un schéma CVFE
Keywords:
hydrogeological modeling, transfer, numerical scheme, finite elements, CVFE, storage, COUPLEX, radioactive wasteAbstract
The Control Volume Finite Elements (CVFE) is used to solve the transfer equation in porous media in the scope of nuclear waste storage in the geological setting. The main feature of this numerical scheme is the direct introduction of Darcy’s law in the convective term. The used data are hydraulic heads and permeabilities and not the usual velocity field. The boundary terms are also defined and computed more precisely as in a classic Finite Elements scheme. The CVFE has been applied to solve the COUPLEX1 modeling exercice, defined by ANDRA (the French Agency for Nuclear Waste Management) for the modeling of transfer radionucleides releasecd from a deap nuclear waste storage to the discharge areas. The results show that the CVFE scheme respects well the mass balance and is validated by the results of the COUPLEX1 exercice participants.
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