Three-dimensional field-scale coupled Thermo-Hydro-Mechanical modelling: parallel computing implementation

Vardon, Philip James, Cleall, Peter John ORCID: https://orcid.org/0000-0002-4005-5319, Thomas, Hywel Rhys ORCID: https://orcid.org/0000-0002-3951-0409, Philp, Roger ORCID: https://orcid.org/0000-0003-3001-0341 and Banicescu, Ioana 2011. Three-dimensional field-scale coupled Thermo-Hydro-Mechanical modelling: parallel computing implementation. International Journal of Geomechanics 11 (2) , pp. 90-98. 10.1061/(ASCE)GM.1943-5622.0000019

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Abstract

An approach for the simulation of three-dimensional field-scale coupled thermo-hydro-mechanical problems is presented, including the implementation of parallel computation algorithms. The approach is designed to allow three-dimensional large-scale coupled simulations to be undertaken in reduced time. Owing to progress in computer technology, existing parallel implementations have been found to be ineffective, with the time taken for communication dominating any reduction in time gained by splitting computation across processors. After analysis of the behavior of the solver and the architecture of multicore, nodal, parallel computers, modification of the parallel algorithm using a novel hybrid message passing interface/open multiprocessing (MPI/OpenMP) method was implemented and found to yield significant improvements by reducing the amount of communication required. This finding reflects recent enhancements of current high-performance computing architectures. An increase in performance of 500% over existing parallel implementations on current processors was achieved for the solver. An example problem involving the Prototype Repository experiment undertaken by the Swedish Nuclear Fuel and Waste Management Co. [Svensk Kärnbränslehantering AB (SKB)] in Äspö, Sweden, has been presented to demonstrate situations in which parallel computation is invaluable because of the complex, highly coupled nature of the problem.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Advanced Research Computing @ Cardiff (ARCCA) Computer Science & Informatics Engineering
Subjects:	Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Uncontrolled Keywords:	Three-dimensional models, Computer analysis, Parallel processing, Transport phenomena, Geotechnical models, Soil mechanics, Unsaturated soils, High-performance computing, Multithreaded, Message passing, Prototype Repository project
Additional Information:	Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/1532-3641/ (accessed 25/02/2014)
Publisher:	American Society of Civil Engineers
ISSN:	1532-3641
Date of First Compliant Deposit:	30 March 2016
Last Modified:	03 May 2023 19:15
URI:	https://orca.cardiff.ac.uk/id/eprint/34267

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