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Abstract
The paper presents numerical simulations of water infiltration in unsaturated porous media containing coarse-textured inclusions embed- ded in fine-textured background material. The calculations are performed using the two-phase model for water and air flow and a simplified model known as the Richards equation. It is shown that the Richards equation cannot correctly describe flow in the presence of heterogeneities. How- ever, its performance can be improved by introducing appropriately de- fined effective capillary and permeability functions, representing large- scale behaviour of the heterogeneous medium.
Authors (3)
-
Insa Neuweiler
- Leibniz University Hannover Institute of Fluid Mechanics and Environmental Physics in Civil Engineering
-
Rainer Helmig
- University of Stuttgart Institute for Modelling Hydraulic and Envir onmental Systems
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- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.2478/s11600-014-0224-7
- License
- Copyright (2014 Institute of Geophysics, Polish Academy of Sciences)
Keywords
Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
Acta Geophysica
no. 62,
pages 1179 - 1191,
ISSN: 1895-6572 - Language:
- English
- Publication year:
- 2014
- Bibliographic description:
- Szymkiewicz A., Neuweiler I., Helmig R.: Influence of heterogeneous air entry pressure on large scale unsaturated flow in porous media// Acta Geophysica. -Vol. 62, nr. 5 (2014), s.1179-1191
- Verified by:
- Gdańsk University of Technology
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