CFEST1.1. Coupled Fluid Energy Solute Transport

Technical Report · Thu Oct 01 00:00:00 EDT 1987

OSTI ID:139312

Gupta, S K ^[1]; Cole, C R ^[2]

---

1. Battelle Project Management Division, Columbus, OH (United States)
2. Pacific Northwest Lab., Richland, WA (United States)

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. Initial conditions can be prescribed hydraulic head or pressure, temperature, or concentration. 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, and salinity 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 tests.

• Research Organization: Battelle Memorial Inst., Columbus, OH (United States). Office of Nuclear Waste Isolation
• Sponsoring Organization: USDOE Office of Civilian Radioactive Waste Management, Washington, DC (United States)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 139312
• Report Number(s): ESTSC-000223D078000; NESC-9537
• Resource Relation: Other Information: DN: The auxiliary plotting programs make calls to proprietary CalComp software; this software is not included.; PBD: 1 Oct 1987
• Country of Publication: United States
• Language: English

Related Subjects

99 MATHEMATICS
COMPUTERS
INFORMATION SCIENCE
MANAGEMENT
LAW
MISCELLANEOUS
05 NUCLEAR FUELS
54 ENVIRONMENTAL SCIENCES
C CODES
DARCY LAW
GROUND WATER
COMPUTER PROGRAM DOCUMENTATION
THREE-DIMENSIONAL CALCULATIONS
RADIOACTIVE WASTE DISPOSAL
FLUID FLOW
SITE CHARACTERIZATION
AQUIFERS
FINITE ELEMENT METHOD
PARTIAL DIFFERENTIAL EQUATIONS
HYDROLOGY