Flow upscaling in fractured porous media

A paper has recently appeared in Journal of Computational Physics:

Formal upscaling and numerical validation of unsaturated flow models in fractured porous media by F.List, K. Kumar, I.S. Pop and F.A. Radu https://www.sciencedirect.com/science/article/pii/S0021999119308435?via%3Dihub

Formal upscaling is performed for a domain containing one fracture. The medium is assumed to be unsaturated. Depending on the ratio between the permeability/porosity in the fracture and in the outer medium a cascade of models is obtained. The paper aims to answer which is the right model to be used in the different cases.

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