Machaček, Jan ; Fuentes, William ; Staubach, Patrick ; Zachert, Hauke ; Wichtmann, Torsten ; Triantafyllidis, Theodoros (2023)
A Theory of Porous Media for Unsaturated Soils with Immobile Air.
In: Computers and Geotechnics, 157
doi: 10.1016/j.compgeo.2023.105324
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The Theory of Porous Media (TPM) has served as a reliable theory to deduce governing equations for unsaturated soils. In most works, the unsaturated soil is considered as a three-phase medium composed of air, water and solid. This neglects effects caused by the presence of residual water and/or entrapped (immobile) air attached to the particles. In this work, a set of governing equations for unsaturated soils with residual water and entrapped air is deduced. A mass transfer mechanism between the free air and the entrapped air is considered. The present work focuses only on the entrapped air attached to the particles (immobile air), and therefore it is assumed to have the same intrinsic velocity as the solid. This assumption allows to keep the same number of independent kinematic variables as in conventional three-phase theories. The performance of the theory is examined in simulations of water retention curves subjected to suction cycles, as well as in the dynamic analysis of a centrifuge test on a dam subjected to earthquake loading.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Machaček, Jan ; Fuentes, William ; Staubach, Patrick ; Zachert, Hauke ; Wichtmann, Torsten ; Triantafyllidis, Theodoros |
| Art des Eintrags: | Bibliographie |
| Titel: | A Theory of Porous Media for Unsaturated Soils with Immobile Air |
| Sprache: | Englisch |
| Publikationsjahr: | 21 Februar 2023 |
| Verlag: | Elsevier BV |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Computers and Geotechnics |
| Jahrgang/Volume einer Zeitschrift: | 157 |
| DOI: | 10.1016/j.compgeo.2023.105324 |
| URL / URN: | https://www.sciencedirect.com/science/article/pii/S0266352X2... |
| Kurzbeschreibung (Abstract): | The Theory of Porous Media (TPM) has served as a reliable theory to deduce governing equations for unsaturated soils. In most works, the unsaturated soil is considered as a three-phase medium composed of air, water and solid. This neglects effects caused by the presence of residual water and/or entrapped (immobile) air attached to the particles. In this work, a set of governing equations for unsaturated soils with residual water and entrapped air is deduced. A mass transfer mechanism between the free air and the entrapped air is considered. The present work focuses only on the entrapped air attached to the particles (immobile air), and therefore it is assumed to have the same intrinsic velocity as the solid. This assumption allows to keep the same number of independent kinematic variables as in conventional three-phase theories. The performance of the theory is examined in simulations of water retention curves subjected to suction cycles, as well as in the dynamic analysis of a centrifuge test on a dam subjected to earthquake loading. |
| Freie Schlagworte: | Air entrapment, Multiphase fluid flow, Residual air, Soil water retention, Theory of porous media |
| Fachbereich(e)/-gebiet(e): | 13 Fachbereich Bau- und Umweltingenieurwissenschaften 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut für Geotechnik |
| Hinterlegungsdatum: | 22 Feb 2023 09:50 |
| Letzte Änderung: | 22 Feb 2023 09:50 |
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