NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES

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Program name | Package id | Status | Status date |
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CFEST-1.1 | NESC9537/01 | Tested | 20-NOV-1990 |

Machines used:

Package ID | Orig. computer | Test computer |
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NESC9537/01 | DEC VAX 11/780 | DEC VAX 8810 |

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3. DESCRIPTION OF PROGRAM OR FUNCTION

CFEST is a Coupled Fluid, Energy, and Solute Transport code for the study of a multilayered, nonisothermal ground-water system. It can model discontinuous as well as continuous layers, time-dependent and constant source/sinks, and transient as well as steady-state flow. The finite element method is used for analyzing isothermal and nonisothermal events in a confined aquifer system. Only single-phase Darcian flow is considered. In the Cartesian coordinate system, flow in a horizontal plane, in a vertical plane, or in a fully three-dimensional region can be simulated. An option also exists for the axisymmetric analysis of a vertical cross section. The code employs bilinear quadrilateral elements in all two-dimensional analyses and trilinear quadrilateral solid elements in three-dimensional simulations.

The CFEST finite element formulation can approximate discontinuities, major breaks in slope or thickness, and fault zones in individual hydrogeologic units. The code accounts for heterogeneity in aquifer permeability and porosity and accommodates anisotropy (collinear with the Cartesian coordinates). The variation in the hydraulic properties is described on a layer-by-layer basis for the different hydrogeologic units. Options are included for both constant and time-variant Dirichlet (specification of the dependent variables) and Neumann (specification of a flux of variables) boundary conditions. Initial conditions can be prescribed hydraulic head or pressure, temperature, or concentration. The computations are performed in five subprograms for sequential execution of large problems with auxiliary programs included for generation of input files and plotting of input data and computed results.

CFEST can be used to support site, repository, and waste package subsystem assessments. Some specific applications are regional hydrologic characterization; simulation of coupled transport of fluid, heat, andsalinity in the repository region; consequence assessment due to natural disruption or human intrusion scenarios in the repository region; flow paths and travel-time estimates for transport of radionuclides; and interpretation of well and tracer test.

CFEST is a Coupled Fluid, Energy, and Solute Transport code for the study of a multilayered, nonisothermal ground-water system. It can model discontinuous as well as continuous layers, time-dependent and constant source/sinks, and transient as well as steady-state flow. The finite element method is used for analyzing isothermal and nonisothermal events in a confined aquifer system. Only single-phase Darcian flow is considered. In the Cartesian coordinate system, flow in a horizontal plane, in a vertical plane, or in a fully three-dimensional region can be simulated. An option also exists for the axisymmetric analysis of a vertical cross section. The code employs bilinear quadrilateral elements in all two-dimensional analyses and trilinear quadrilateral solid elements in three-dimensional simulations.

The CFEST finite element formulation can approximate discontinuities, major breaks in slope or thickness, and fault zones in individual hydrogeologic units. The code accounts for heterogeneity in aquifer permeability and porosity and accommodates anisotropy (collinear with the Cartesian coordinates). The variation in the hydraulic properties is described on a layer-by-layer basis for the different hydrogeologic units. Options are included for both constant and time-variant Dirichlet (specification of the dependent variables) and Neumann (specification of a flux of variables) boundary conditions. Initial conditions can be prescribed hydraulic head or pressure, temperature, or concentration. The computations are performed in five subprograms for sequential execution of large problems with auxiliary programs included for generation of input files and plotting of input data and computed results.

CFEST can be used to support site, repository, and waste package subsystem assessments. Some specific applications are regional hydrologic characterization; simulation of coupled transport of fluid, heat, andsalinity in the repository region; consequence assessment due to natural disruption or human intrusion scenarios in the repository region; flow paths and travel-time estimates for transport of radionuclides; and interpretation of well and tracer test.

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4. METHOD OF SOLUTION

CFEST solves partial differential equations (PDEs) for pressure, temperature, and solute concentration for large, multilayered, natural hydrologic systems using the finite element method. These equations are coupled with fluid properties of density and viscosity. The relationship between porosity and pore-water pressure is also taken into account. The algorithm used to solve this coupled set of PDEs is based on linearization of the coupled equations. The scheme utilized to solve the resulting large, sparse matrices involves two matrices, one to store only nonzero coefficients and the other to identify the column associated with these coefficients. Vectors containing the first and last rows associated with each column are used to limit operations to only the required number of rows of the system matrix. For constant time steps and steafy-state flow (ignoring density variation effects), the equation solver uses a back substitution scheme. When density or viscosity effects are considered, a new system matrix is developed and solved at each time step.

The latest known values of pressure, temperature, and solute concentration are used to compute fluid are aquifer properties.

CFEST solves partial differential equations (PDEs) for pressure, temperature, and solute concentration for large, multilayered, natural hydrologic systems using the finite element method. These equations are coupled with fluid properties of density and viscosity. The relationship between porosity and pore-water pressure is also taken into account. The algorithm used to solve this coupled set of PDEs is based on linearization of the coupled equations. The scheme utilized to solve the resulting large, sparse matrices involves two matrices, one to store only nonzero coefficients and the other to identify the column associated with these coefficients. Vectors containing the first and last rows associated with each column are used to limit operations to only the required number of rows of the system matrix. For constant time steps and steafy-state flow (ignoring density variation effects), the equation solver uses a back substitution scheme. When density or viscosity effects are considered, a new system matrix is developed and solved at each time step.

The latest known values of pressure, temperature, and solute concentration are used to compute fluid are aquifer properties.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Maxima of -

4000 nodes

4000 elements

1000 surface nodes

1000 surface elements

999 grid points

100 element sources

100 element sinks

CFEST is primarily designed for a confined aquifer system. Unconfined steady-state and transient solutions can be obtained by iterative execution and upgrading the top elevation of the saturated zone. Variable density solutions are obtained by iterative substitution. The user must set appropriate limits for updating fluid density to avoid steady-state transport solutions that may cause oscillatory results. Multidimensional transport of a single radionuclide is supported. Radionuclide chain migrations are not simulated.

Maxima of -

4000 nodes

4000 elements

1000 surface nodes

1000 surface elements

999 grid points

100 element sources

100 element sinks

CFEST is primarily designed for a confined aquifer system. Unconfined steady-state and transient solutions can be obtained by iterative execution and upgrading the top elevation of the saturated zone. Variable density solutions are obtained by iterative substitution. The user must set appropriate limits for updating fluid density to avoid steady-state transport solutions that may cause oscillatory results. Multidimensional transport of a single radionuclide is supported. Radionuclide chain migrations are not simulated.

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NESC9537/01

NEA-DB executed the test case command procedure included in this package on a DEC VAX 8810 computer in 1m36s of CPU time.[ top ]

7. UNUSUAL FEATURES OF THE PROGRAM

Data for physical quantities is accepted in any consystent system of units. The user can specify the conversion factors for coordinates, hydraulic conductivity/ permeability, head, temperature, and concentration data to develop a consistent set of units for internal use. Restart capabilities allow continuation from any previously completed time step or simulation.

Data for physical quantities is accepted in any consystent system of units. The user can specify the conversion factors for coordinates, hydraulic conductivity/ permeability, head, temperature, and concentration data to develop a consistent set of units for internal use. Restart capabilities allow continuation from any previously completed time step or simulation.

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NESC9537/01, included references:

- S.K. Gupta, C.R. Cole, C.T. Kincaid and A.M. Monti:Coupled Fluid, Energy, and Solute Transport (CFEST) Model:

Formulation and User's Manual

BMI/ONWI-660 (October 1987)

- C. Yuelys-Miksis:

CFEST-1 Tape Description

NESC Note 89-02 (October 25, 1988)

- NEA Data Bank:

Note for Users intending to implement CFEST-1.1 on CONVEX C210

NDB/91/0688 (22 May, 1991)

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Package ID | Computer language |
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NESC9537/01 | FORTRAN-V (UNIVAC) |

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NESC9537/01

VMS V5.1-1 with compiler FORTRAN V5.0-1 (VAX 8810).[ top ]

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NESC9537/01

File name | File description | Records |
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NESC9537_01.001 | information file | 219 |

NESC9537_01.002 | description of tape contents | 37 |

NESC9537_01.003 | command file to compile and link FOR files | 57 |

NESC9537_01.004 | description of CFEST parameters | 348 |

NESC9537_01.005 | source, initialize system matrix | 460 |

NESC9537_01.006 | generate contour plots of input and output | 2574 |

NESC9537_01.007 | reads bin files, prep. inp files for LCONTUR | 428 |

NESC9537_01.008 | diff btw models result and initial condition | 613 |

NESC9537_01.009 | restart a trans or std-state model simul | 434 |

NESC9537_01.010 | re-initialization program | 384 |

NESC9537_01.011 | prepares LPROG3I input file | 570 |

NESC9537_01.012 | creates LPROG1 input file | 858 |

NESC9537_01.013 | prepares input control file for LPROG3 exec. | 574 |

NESC9537_01.014 | estimates temperature | 2992 |

NESC9537_01.015 | plotting program | 1245 |

NESC9537_01.016 | plotting program | 1246 |

NESC9537_01.017 | lists available mass balance information | 516 |

NESC9537_01.018 | generates addit. printed time step output | 614 |

NESC9537_01.019 | reads input data and generates bun files | 3613 |

NESC9537_01.020 | calculates constant integration parameters | 1154 |

NESC9537_01.021 | main progr for cyclic estim. phys. quant. | 7250 |

NESC9537_01.022 | creates input for LPROG3 | 1884 |

NESC9537_01.023 | prepares input files for LPRESULT | 599 |

NESC9537_01.024 | reads and changes the trace switches | 154 |

NESC9537_01.025 | plotting program | 4419 |

NESC9537_01.026 | plotting program | 919 |

NESC9537_01.027 | calculates and prints velocities | 2864 |

NESC9537_01.028 | plotting program | 1643 |

NESC9537_01.029 | include file | 11 |

NESC9537_01.030 | include file | 105 |

NESC9537_01.031 | include file | 8 |

NESC9537_01.032 | include file | 8 |

NESC9537_01.033 | include file | 15 |

NESC9537_01.034 | include file | 9 |

NESC9537_01.035 | include file | 9 |

NESC9537_01.036 | include file | 17 |

NESC9537_01.037 | include file | 9 |

NESC9537_01.038 | include file | 9 |

NESC9537_01.039 | include file | 9 |

NESC9537_01.040 | include file | 9 |

NESC9537_01.041 | include file | 10 |

NESC9537_01.042 | include file | 10 |

NESC9537_01.043 | include file | 116 |

NESC9537_01.044 | include file | 10 |

NESC9537_01.045 | include file | 10 |

NESC9537_01.046 | include file | 25 |

NESC9537_01.047 | include file | 8 |

NESC9537_01.048 | include file | 10 |

NESC9537_01.049 | include file | 36 |

NESC9537_01.050 | include file | 14 |

NESC9537_01.051 | include file | 8 |

NESC9537_01.052 | include file | 8 |

NESC9537_01.053 | include file | 49 |

NESC9537_01.054 | include file | 14 |

NESC9537_01.055 | include file | 8 |

NESC9537_01.056 | include file | 8 |

NESC9537_01.057 | include file | 16 |

NESC9537_01.058 | include file | 22 |

NESC9537_01.059 | include file | 16 |

NESC9537_01.060 | include file | 129 |

NESC9537_01.061 | include file | 12 |

NESC9537_01.062 | include file | 11 |

NESC9537_01.063 | include file | 56 |

NESC9537_01.064 | include file | 9 |

NESC9537_01.065 | include file | 9 |

NESC9537_01.066 | include file | 10 |

NESC9537_01.067 | include file | 86 |

NESC9537_01.068 | include file | 14 |

NESC9537_01.069 | include file | 9 |

NESC9537_01.070 | include file | 10 |

NESC9537_01.071 | include file | 30 |

NESC9537_01.072 | include file | 11 |

NESC9537_01.073 | include file | 77 |

NESC9537_01.074 | include file | 77 |

NESC9537_01.075 | include file | 78 |

NESC9537_01.076 | include file | 10 |

NESC9537_01.077 | include file | 25 |

NESC9537_01.078 | include file | 17 |

NESC9537_01.079 | include file | 20 |

NESC9537_01.080 | include file | 14 |

NESC9537_01.081 | include file | 8 |

NESC9537_01.082 | include file | 8 |

NESC9537_01.083 | Description of sample problemes | 21 |

NESC9537_01.084 | command file to execute sample problems | 450 |

NESC9537_01.085 | LPROG3I input | 20 |

NESC9537_01.086 | LPROG1 input | 100 |

NESC9537_01.087 | LPROG3I input | 20 |

NESC9537_01.088 | LPROG1 input | 90 |

NESC9537_01.089 | LPROG3I input | 20 |

NESC9537_01.090 | LPROG1 input | 100 |

NESC9537_01.091 | LPROG3I input | 20 |

NESC9537_01.092 | LPROG1 input | 80 |

NESC9537_01.093 | LPROG3I input | 20 |

NESC9537_01.094 | LPROG1 input | 320 |

NESC9537_01.095 | LPROG3I input | 30 |

NESC9537_01.096 | LPROG1 input | 100 |

NESC9537_01.097 | LCONTURI input | 10 |

NESC9537_01.098 | LVSECTION input | 10 |

NESC9537_01.099 | Log file from execution of file 83 | 3599 |

NESC9537_01.100 | LPROG1 output | 277 |

NESC9537_01.101 | LPROG1 output | 272 |

NESC9537_01.102 | LPROG1 output | 382 |

NESC9537_01.103 | LPROG1 output | 384 |

NESC9537_01.104 | LPROG1 output | 956 |

NESC9537_01.105 | LPROG1 output | 709 |

NESC9537_01.106 | LPROG3I output | 67 |

NESC9537_01.107 | LPROG3I output | 58 |

NESC9537_01.108 | LPROG3I output | 55 |

NESC9537_01.109 | LPROG3I output | 60 |

NESC9537_01.110 | LPROG3I output | 48 |

NESC9537_01.111 | LPROG3I output | 87 |

NESC9537_01.112 | LPROG3 output | 246 |

NESC9537_01.113 | LPROG3 output | 311 |

NESC9537_01.114 | LPROG3 output | 75 |

NESC9537_01.115 | LPROG3 output | 311 |

NESC9537_01.116 | LPROG3 output | 175 |

NESC9537_01.117 | LPROG3 output | 939 |

Keywords: finite element method, fluid flow, ground water, hydrology, partial differential equations.