Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1016/j.cageo.2008.07.007 |
| Title (Primary) | A parallel finite element scheme for thermo-hydro-mechanical (THM) coupled problems in porous media |
| Author | Wang, W.
; Kosakowski, G.; Kolditz, O.
|
| Source Titel | Computers & Geosciences |
| Year | 2009 |
| Department | ENVINF |
| Volume | 35 |
| Issue | 8 |
| Page From | 1631 |
| Page To | 1641 |
| Language | englisch |
| Keywords | Parallel computing; Finite element method; Domain decomposition; Thermo-hydro-mechanical (THM) coupled processes; Porous media |
| Abstract | Many applied problems in geoscience require knowledge about complex interactions between multiple physical and chemical processes in the sub-surface. As a direct experimental investigation is often not possible, numerical simulation is a common approach. The numerical analysis of coupled thermo-hydro-mechanical (THM) problems is computationally very expensive, and therefore the applicability of existing codes is still limited to simplified problems. In this paper we present a novel implementation of a parallel finite element method (FEM) for the numerical analysis of coupled THM problems in porous media. The computational task of the FEM is partitioned into sub-tasks by a priori domain decomposition. The sub-tasks are assigned to the CPU nodes concurrently. Parallelization is achieved by simultaneously establishing the sub-domain mesh topology, synchronously assembling linear equation systems in sub-domains and obtaining the overall solution with a sub-domain linear solver (parallel BiCGStab method with Jacobi pre-conditioner). The present parallelization method is implemented in an object-oriented way using MPI for inter-processor communication. The parallel code was successfully tested with a 2-D example from the international DECOVALEX benchmarking project. The achieved speed-up for a 3-D extension of the test example on different computers demonstrates the advantage of the present parallel scheme. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=693 |
| Wang, W., Kosakowski, G., Kolditz, O. (2009): A parallel finite element scheme for thermo-hydro-mechanical (THM) coupled problems in porous media Comput. Geosci. 35 (8), 1631 - 1641 10.1016/j.cageo.2008.07.007 |
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