TY - GEN digital ID - 131516961 TI - Modelling Water Flow in Unsaturated Porous Media : Accounting for Nonlinear Permeability and Material Heterogeneity PY - 2013 SN - 9783642235597 PB - Berlin, Heidelberg Springer DB - UniCat KW - Geophysics KW - Geology. Earth sciences KW - Hydraulic energy KW - Physical geography KW - Geography KW - hydrologie KW - geografie KW - fysische geografie KW - geofysica KW - hydraulica UR - https://www.unicat.be/uniCat?func=search&query=sysid:131516961 AB - The book focuses on two issues related to mathematical and numerical modelling of flow in unsaturated porous media. In the first part numerical solution of the governing equations is discussed, with particular emphasis on the spatial discretization of highly nonlinear permeability coefficient. The second part deals with large scale flow in heterogeneous porous media of binary structure. Upscaled models are developed and it is shown that the presence of material heterogeneities may give rise to additional non-equilibrium terms in the governing equations or to hysteresis in the averaged constitutive relationships. ER -