Experimental and Numerical Analysis of Air Trapping in a Porous Medium with Coarse Textured Inclusions

• Autorzy: Szymańska P. , Tisler W. , Schütz C. , Szymkiewicz A. , Neuweiler I. , Helmig R.

Identyfikatory

DOI

10.1515/acgeo-2016-0095

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

vadose zone; Richards' equation; heterogeneous soils; air trapping

PL

strefa aeracji; równanie Richarda; grunty niejednorodne; zamykanie powietrza

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2016
• Tom: Vol. 64, no. 6
• Strony: 2487--2509
• Opis fizyczny: Bibliogr. 42 poz.

Twórcy

autor

Szymańska P.

• Gdańsk University of Technology, Faculty of Civil and Environmental Engineering, Department of Geotechnics, Geology and Marine Civil Engineering, Gdańsk, Poland

autor

Tisler W.

• Gdańsk University of Technology, Faculty of Civil and Environmental Engineering, Department of Geotechnics, Geology and Marine Civil Engineering, Gdańsk, Poland

autor

Schütz C.

• Institute of Fluid Mechanics and Environmental Physics in Civil Engineering, Leibniz University Hannover, Hannover, Germany

autor

Szymkiewicz A.

• Gdańsk University of Technology, Faculty of Civil and Environmental Engineering, Department of Geotechnics, Geology and Marine Civil Engineering, Gdańsk, Poland

autor

Neuweiler I.

• Institute of Fluid Mechanics and Environmental Physics in Civil Engineering, Leibniz University Hannover, Hannover, Germany

autor

Helmig R.

• Institute for Modelling of Hydraulic and Environmental Systems, University of Stuttgart, Stuttgart, Germany

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)