Taking into account air pressure variations in subsoil air-water

Jerome Jaffre, Estelle Marchand, François Clement, Jean Roberts & Jerome Jaffre
The Richards equation is widely used in hydrogeology for modelling flow in an unsaturated porous media. It is a simplified version of the general two-phase model, which assumes that air pressure is invariant. To fully take into account the presence of air which may be trapped in the subsoil, it will be necessary to consider the non simplified two-phase flow. The aim of this work is to examine different numerical methods for trading these two...
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