BIGFLOW: A numerical code for simulating flow in variably saturated, heterogeneous geologic media. Theory and user`s manaual, Version 1.1

Technical Report · Tue Jun 01 04:00:00 EDT 1993

DOI:https://doi.org/10.2172/10168217· OSTI ID:10168217

Ababou, R ^[1]; Bagtzoglou, A C ^[2]

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1. CEA Centre d`Etudes de Saclay, 91 - Gif-sur-Yvette (France)
2. Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses

This report documents BIGFLOW 1.1, a numerical code for simulating flow in variably saturated heterogeneous geologic media. It contains the underlying mathematical and numerical models, test problems, benchmarks, and applications of the BIGFLOW code. The BIGFLOW software package is composed of a simulation and an interactive data processing code (DATAFLOW). The simulation code solves linear and nonlinear porous media flow equations based on Darcy`s law, appropriately generalized to account for 3D, deterministic, or random heterogeneity. A modified Picard Scheme is used for linearizing unsaturated flow equations, and preconditioned iterative methods are used for solving the resulting matrix systems. The data processor (DATAFLOW) allows interactive data entry, manipulation, and analysis of 3D datasets. The report contains analyses of computational performance carried out using Cray-2 and Cray-Y/MP8 supercomputers. Benchmark tests include comparisons with other independently developed codes, such as PORFLOW and CMVSFS, and with analytical or semi-analytical solutions.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (United States). Div. of Regulatory Applications; CEA Centre d`Etudes de Saclay, 91 - Gif-sur-Yvette (France); Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses
• Sponsoring Organization: Nuclear Regulatory Commission, Washington, DC (United States)
• OSTI ID: 10168217
• Report Number(s): NUREG/CR--6028; CNWRA--92-026; ON: TI93016383
• Country of Publication: United States
• Language: English

Related Subjects

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12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
99 GENERAL AND MISCELLANEOUS
990200
ALGORITHMS
B CODES
BENCHMARKS
COMPUTERIZED SIMULATION
FLUID FLOW
GEOLOGIC FORMATIONS
HYDROLOGY
ITERATIVE METHODS
MATHEMATICAL MODELS
MATHEMATICS AND COMPUTERS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE STORAGE
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WASTE DISPOSAL AND STORAGE