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Environmental Earth Sciences

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01.03.2011 | Original Article

Non-isothermal flow in low permeable porous media: a comparison of Richards’ and two-phase flow approaches

verfasst von: Wenqing Wang, Jonny Rutqvist, Uwe-Jens Görke, Jens T. Birkholzer, Olaf Kolditz

Erschienen in: Environmental Earth Sciences | Ausgabe 6/2011

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Abstract

The present work compares the performance of two alternative flow models for the simulation of thermal-hydraulic coupled processes in low permeable porous media: non-isothermal Richards’ and two-phase flow concepts. Both models take vaporization processes into account: however, the Richards’ model neglects dynamic pressure variations and bulk flow of the gaseous phase. For the comparison of the two approaches first published, data from a laboratory experiment are studied involving thermally driven moisture flow in a partially saturated bentonite sample. Then a benchmark test of longer-term thermal-hydraulic behavior in the engineered barrier system of a geological nuclear waste repository is analyzed (DECOVALEX project). It was found that both models can be used to reproduce the vaporization process if the intrinsic permeability is relative high. However, when a thermal-hydraulic coupled problem has the same low intrinsic permeability, only the two-phase flow approach provides reasonable results.

Vorheriger Artikel A study of arsenic, iron and other dissolved ion variations in the groundwater of Bishnupur District, Manipur, India

Nächster Artikel Phosphorus fractions in the surface sediments of three mangrove systems of southwest coast of India

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Titel: Non-isothermal flow in low permeable porous media: a comparison of Richards’ and two-phase flow approaches
verfasst von: Wenqing Wang
Jonny Rutqvist
Uwe-Jens Görke
Jens T. Birkholzer
Olaf Kolditz
Publikationsdatum: 01.03.2011
Verlag: Springer-Verlag
Erschienen in: Environmental Earth Sciences / Ausgabe 6/2011
Print ISSN: 1866-6280
Elektronische ISSN: 1866-6299
DOI: https://doi.org/10.1007/s12665-010-0608-1

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