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| Titel |
A phreeqC-Elmer coupling algorithm for T-H-M-C modeling applications |
| VerfasserIn |
Alain Dimier, Elodie Jeandel |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250051614
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| Zusammenfassung |
| At the end of the twentieth century, the scientific community warned for greenhouse gas
effects on the global climate warming. Today, one of the main studied solutions to
that problem is the so called Capture and Carbone Storage, C.C.S., namely the
geological storage of “industry-induced” CO2, mainly in brine aquifers and also in
depleted oil reservoirs. Working on that topic, associated to the acquisition of an
experimental CO2-brine-rock reactive percolation test bench, we decided to work
on numerical modelling in that field, involving the so called T-H-M-C coupling;
the association of modelling and experiments enabling a better understanding and
characterization of processes determining how the subsurface will behave as a storage
container.
For modelling, we investigate coupling of open source software’s to access the
aforementioned physics. For such a phenomenology, one way to efficiently implement a
multidimensional numerical tool is to couple already available open source tools. That can be
done using the operator splitting methodology eventually combined with a sequential iterative
approach.
Operator splitting enables to have a modular approach, already available tools becoming
part of a new “wrapping” tool, to give access to the broader targeted phenomenology. Object
oriented programming has been used to design the tool.
We will briefly present each of the software used in the coupling, namely:
PhreeqC, [1] http://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqc, from the USGS,
for geochemistry,
Elmer, [2] http://www.csc.fi/english/pages/elmer, from the CSC finish research center, for
flow, ion transport, temperature and mechanics,
Saturne, [3] http://www.code-saturne.org, from EDF, for atmospheric transport
The main part of the presentation will focus on the way the tool is implemented,
illustrated with the setup of one simple test case. Various examples issued, partially, from lab
experiments will also illustrate its possibilities and potential in terms of phenomenology and
computing efficiency. |
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