Open AccessSimulation of Infiltration Processes in the Unsaturated Zone Using a Multiscale Approach
Author(s) -
Kissling Frederike,
Helmig Rainer,
Rohde Christian
Publication year - 2012
Publication title -
vadose zone journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.036
H-Index - 81
ISSN - 1539-1663
DOI - 10.2136/vzj2011.0193
Subject(s) - microscale chemistry , infiltration (hvac) , capillary pressure , porous medium , saturation (graph theory) , wetting , homogeneous , overshoot (microwave communication) , mechanics , capillary action , materials science , porosity , geotechnical engineering , geology , soil science , computer science , statistical physics , physics , mathematics , composite material , telecommunications , mathematics education , combinatorics
We consider the infiltration of a wetting fluid into a homogeneous porous medium and the formation of preferential flow paths with saturation overshoots. These are caused by dynamic capillary pressure effects which can be modeled by the rate‐dependent approach of Hassanizadeh and Gray. To track the overshoot wave numerically, we propose an extended Heterogeneous Multiscale Method. In the approach, the rate‐dependent model takes the role of a microscale model. The algorithm is applied to several infiltration problems.