Document Detail

A Parallel PCG Solver for MODFLOW.
MedLine Citation:
PMID:  19563427     Owner:  NLM     Status:  In-Data-Review    
In order to simulate large-scale ground water flow problems more efficiently with MODFLOW, the OpenMP programming paradigm was used to parallelize the preconditioned conjugate-gradient (PCG) solver with in this study. Incremental parallelization, the significant advantage supported by OpenMP on a shared-memory computer, made the solver transit to a parallel program smoothly one block of code at a time. The parallel PCG solver, suitable for both MODFLOW-2000 and MODFLOW-2005, is verified using an 8-processor computer. Both the impact of compilers and different model domain sizes were considered in the numerical experiments. Based on the timing results, execution times using the parallel PCG solver are typically about 1.40 to 5.31 times faster than those using the serial one. In addition, the simulation results are the exact same as the original PCG solver, because the majority of serial codes were not changed. It is worth noting that this parallelizing approach reduces cost in terms of software maintenance because only a single source PCG solver code needs to be maintained in the MODFLOW source tree.
Yanhui Dong; Guomin Li
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Publication Detail:
Type:  Journal Article     Date:  2009-06-29
Journal Detail:
Title:  Ground water     Volume:  47     ISSN:  1745-6584     ISO Abbreviation:  Ground Water     Publication Date:    2009 Nov-Dec
Date Detail:
Created Date:  2012-07-03     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882886     Medline TA:  Ground Water     Country:  United States    
Other Details:
Languages:  eng     Pagination:  845-50     Citation Subset:  IM    
Copyright Information:
Copyright © 2009 The Author(s). Journal Compilation © 2009 National Ground Water Association.
Key Laboratory of Engineering Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences, P. O. BOX 9825 Beijing, 100029 China.
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