skip to main content

Title: Massively parallel simulation of flow and transport in variably saturated porous and fractured media

This paper describes a massively parallel simulation method and its application for modeling multiphase flow and multicomponent transport in porous and fractured reservoirs. The parallel-computing method has been implemented into the TOUGH2 code and its numerical performance is tested on a Cray T3E-900 and IBM SP. The efficiency and robustness of the parallel-computing algorithm are demonstrated by completing two simulations with more than one million gridblocks, using site-specific data obtained from a site-characterization study. The first application involves the development of a three-dimensional numerical model for flow in the unsaturated zone of Yucca Mountain, Nevada. The second application is the study of tracer/radionuclide transport through fracture-matrix rocks for the same site. The parallel-computing technique enhances modeling capabilities by achieving several-orders-of-magnitude speedup for large-scale and high resolution modeling studies. The resulting modeling results provide many new insights into flow and transport processes that could not be obtained from simulations using the single-CPU simulator.
Authors:
; ;
Publication Date:
OSTI Identifier:
791815
Report Number(s):
LBNL--49407
R&D Project: 80NB71; TRN: US0200693
DOE Contract Number:
AC03-76SF00098
Resource Type:
Conference
Resource Relation:
Conference: XIV International Conference on Computational Methods in Water Resources, Delft (NL), 06/23/2002--06/28/2002; Other Information: PBD: 15 Jan 2002
Research Org:
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
Sponsoring Org:
USDOE Office of Civilian Radioactive Waste Management. Yucca Mountain Site Characterization Office (US)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; ALGORITHMS; FRACTURED RESERVOIRS; MULTIPHASE FLOW; PERFORMANCE; COMPUTERIZED SIMULATION; SITE CHARACTERIZATION; ENVIRONMENTAL TRANSPORT; WATER RESOURCES; YUCCA MOUNTAIN; RADIOACTIVE WASTE DISPOSAL; T CODES; RADIONUCLIDE MIGRATION PARALLEL COMPUTING RESERVOIR SIMULATION