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| Titel |
Pore Scale Simulation of Tailing |
| VerfasserIn |
J. Fahlke, C. Engwer, S. P. Kuttanikkad, O. Ippisch, P. Bastian, K. Roth |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250028744
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| Zusammenfassung |
| When performing solute transport in porous media one often observes macroscopic tailing,
even with non-sorbing solutes. This is typically traced back to structural heterogeneity and
heuristically represented by the mobile-immobile model (MIM). However, tailing has also
been observed in an almost perfect uniform medium.
In this presentation we show pore scale numerical experiments to elucidate
the MIM. The time-dependent Convection-Diffusion equation was solved in some
randomly generated porous domain. The velocity field was calculated using the
Stokes equation. The method was verified using some artificial domains and velocity
fields.
The results of the simulation showed significant tailing, demonstrating that tailing can
indeed be a pore scale effect. Stagnant zones were also observed, as required by the MIM.
The method can be used to estimate effective MIM parameters and relate them to the Peclet
number and to Pemacro-Pemicro. |
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