Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 2487-2509 |
| Seitenumfang | 23 |
| Fachzeitschrift | Acta geophysica |
| Jahrgang | 64 |
| Ausgabenummer | 6 |
| Publikationsstatus | Veröffentlicht - 28 Dez. 2016 |
Abstract
The paper presents a 2D upward infiltration experiment performed on a model porous medium consisting of fine sand background with two inclusions made of coarser sands. The purpose of the experiment was to investigate the effects of structural air trapping, which occurs during infiltration as a result of heterogeneous material structure. The experiment shows that a significant amount of air becomes trapped in each of the inclusions. Numerical simulations were carried out using the two-phase water-air flow model and the Richards equation. The experimental results can be reproduced with good accuracy only using a two-phase flow model, which accounts for both structural and pore-scale trapping. On the other hand, the Richards equation was not able to represent the structural trapping caused by material heterogeneity.
ASJC Scopus Sachgebiete
- Erdkunde und Planetologie (insg.)
- Geophysik
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in: Acta geophysica, Jahrgang 64, Nr. 6, 28.12.2016, S. 2487-2509.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Experimental and numerical analysis of air trapping in a porous medium with coarse textured inclusions
AU - Szymańska, Paulina
AU - Tisler, Witold
AU - Schütz, Cindi
AU - Szymkiewicz, Adam
AU - Neuweiler, Insa
AU - Helmig, Rainer
PY - 2016/12/28
Y1 - 2016/12/28
N2 - The paper presents a 2D upward infiltration experiment performed on a model porous medium consisting of fine sand background with two inclusions made of coarser sands. The purpose of the experiment was to investigate the effects of structural air trapping, which occurs during infiltration as a result of heterogeneous material structure. The experiment shows that a significant amount of air becomes trapped in each of the inclusions. Numerical simulations were carried out using the two-phase water-air flow model and the Richards equation. The experimental results can be reproduced with good accuracy only using a two-phase flow model, which accounts for both structural and pore-scale trapping. On the other hand, the Richards equation was not able to represent the structural trapping caused by material heterogeneity.
AB - The paper presents a 2D upward infiltration experiment performed on a model porous medium consisting of fine sand background with two inclusions made of coarser sands. The purpose of the experiment was to investigate the effects of structural air trapping, which occurs during infiltration as a result of heterogeneous material structure. The experiment shows that a significant amount of air becomes trapped in each of the inclusions. Numerical simulations were carried out using the two-phase water-air flow model and the Richards equation. The experimental results can be reproduced with good accuracy only using a two-phase flow model, which accounts for both structural and pore-scale trapping. On the other hand, the Richards equation was not able to represent the structural trapping caused by material heterogeneity.
KW - airtrapping
KW - heterogeneous soils
KW - Richards equation
KW - vadose zone
UR - http://www.scopus.com/inward/record.url?scp=85008877397&partnerID=8YFLogxK
U2 - 10.1515/acgeo-2016-0095
DO - 10.1515/acgeo-2016-0095
M3 - Article
AN - SCOPUS:85008877397
VL - 64
SP - 2487
EP - 2509
JO - Acta geophysica
JF - Acta geophysica
SN - 1895-6572
IS - 6
ER -