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http://dx.doi.org/10.18419/opus-13256
Autor(en): | Weishaupt, K. Terzis, A. Zarikos, I. Yang, G. Flemisch, B. de Winter, D. A. M. Helmig, R. |
Titel: | A hybrid-dimensional coupled pore-network/free-flow model including pore-scale slip and its application to a micromodel experiment |
Erscheinungsdatum: | 2020 |
Dokumentart: | Zeitschriftenartikel |
Seiten: | 243-270 |
Erschienen in: | Transport in porous media 135 (2020), S. 243-270 |
URI: | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-132751 http://elib.uni-stuttgart.de/handle/11682/13275 http://dx.doi.org/10.18419/opus-13256 |
ISSN: | 0169-3913 1573-1634 |
Zusammenfassung: | Modeling coupled systems of free flow adjacent to a porous medium by means of fully resolved Navier-Stokes equations is limited by the immense computational cost and is thus only feasible for relatively small domains. Coupled, hybrid-dimensional models can be much more efficient by simplifying the porous domain, e.g., in terms of a pore-network model. In this work, we present a coupled pore-network/free-flow model taking into account pore-scale slip at the local interfaces between free flow and the pores. We consider two-dimensional and three-dimensional setups and show that our proposed slip condition can significantly increase the coupled model’s accuracy: compared to fully resolved equidimensional numerical reference solutions, the normalized errors for velocity are reduced by a factor of more than five, depending on the flow configuration. A pore-scale slip parameter βpore required by the slip condition was determined numerically in a preprocessing step. We found a linear scaling behavior of βpore with the size of the interface pore body for three-dimensional and two-dimensional domains. The slip condition can thus be applied without incurring any run-time cost. In the last section of this work, we used the coupled model to recalculate a microfluidic experiment where we additionally exploited the flat structure of the micromodel which permits the use of a quasi-3D free-flow model. The extended coupled model is accurate and efficient. |
Enthalten in den Sammlungen: | 02 Fakultät Bau- und Umweltingenieurwissenschaften |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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s11242-020-01477-y.pdf | 3,94 MB | Adobe PDF | Öffnen/Anzeigen |
Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons