Details
| Original language | English |
|---|---|
| Pages (from-to) | 1179-1191 |
| Number of pages | 13 |
| Journal | Acta geophysica |
| Volume | 62 |
| Issue number | 5 |
| Publication status | Published - 26 Jun 2014 |
Abstract
The paper presents numerical simulations of water infiltration in unsaturated porous media containing coarse-textured inclusions embedded 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. However, its performance can be improved by introducing appropriately defined effective capillary and permeability functions, representing largescale behaviour of the heterogeneous medium.
Keywords
- air entry pressure, heterogeneous media, two-phase flow, unsaturated flow
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geophysics
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In: Acta geophysica, Vol. 62, No. 5, 26.06.2014, p. 1179-1191.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of heterogeneous air entry pressure on large scale unsaturated flow in porous media
AU - Szymkiewicz, Adam
AU - Neuweiler, Insa
AU - Helmig, Rainer
PY - 2014/6/26
Y1 - 2014/6/26
N2 - The paper presents numerical simulations of water infiltration in unsaturated porous media containing coarse-textured inclusions embedded 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. However, its performance can be improved by introducing appropriately defined effective capillary and permeability functions, representing largescale behaviour of the heterogeneous medium.
AB - The paper presents numerical simulations of water infiltration in unsaturated porous media containing coarse-textured inclusions embedded 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. However, its performance can be improved by introducing appropriately defined effective capillary and permeability functions, representing largescale behaviour of the heterogeneous medium.
KW - air entry pressure
KW - heterogeneous media
KW - two-phase flow
KW - unsaturated flow
UR - http://www.scopus.com/inward/record.url?scp=84906347958&partnerID=8YFLogxK
U2 - 10.2478/s11600-014-0224-7
DO - 10.2478/s11600-014-0224-7
M3 - Article
AN - SCOPUS:84906347958
VL - 62
SP - 1179
EP - 1191
JO - Acta geophysica
JF - Acta geophysica
SN - 1895-6572
IS - 5
ER -