Szymańska, P.; Tisler, W.; Schütz, Cindi; Szymkiewicz, A.; Neuweiler, Insa et al.: Experimental and numerical analysis of air trapping in a porous medium with coarse textured inclusions. In: Acta Geophysica 64 (2016), Nr. 6, S. 2487-2509. DOI:
https://doi.org/10.1515/acgeo-2016-0095
Zusammenfassung: |
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.
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Lizenzbestimmungen: |
CC BY-NC-ND 3.0 Unported - https://creativecommons.org/licenses/by-nc-nd/3.0/
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Publikationstyp: |
Article |
Publikationsstatus: |
publishedVersion |
Erstveröffentlichung: |
2016 |
Schlagwörter (englisch): |
airtrapping, heterogeneous soils, Richards equation, vadose zone, Infiltration, Porous materials, Solute transport, airtrapping, Experimental and numerical analysis, Heterogeneous materials, Heterogeneous soils, Material heterogeneity, Richards Equation, Two phase flow model, Vadose Zone, Two phase flow
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Fachliche Zuordnung (DDC): |
550 | Geowissenschaften
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