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. ORCID logo ; Kosakowski, G.; Kolditz, O. ORCID logo
Journal 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
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