Coupling compositional gas liquid Darcy and free gas flows at porous and free flow domains interface

Roland Masson (1) , L Trenty (2) , Yumeng Zhang (1)

1 COFFEE - COmplex Flows For Energy and Environment
2 ANDRA - Agence Nationale pour la Gestion des Déchets Radioactifs

This paper proposes an efficient splitting algorithm to solve coupled gas liquid Darcy and free gas flows at the interface between a porous medium and a free flow domains. A reduced model using a 1D approximation of the gas free flow is also introduced. This reduced model uses an approximation of the gas molar fraction boundary layer thickness in the free flow domain based on a low frequency approximation of a Steklov Poincaré type operator. The splitting algorithm and the reduced model are applied in particular to the modelling of the mass exchanges at the interface between the storage and the ventilation galleries in radioactive waste deposits.

Domaines: Analyse numérique [math.NA]

Roland Masson, L Trenty, Yumeng Zhang. Coupling compositional gas liquid Darcy and free gas flows at porous and free flow domains interface. 2015. ⟨hal-01238530v1⟩