SWIFT - 3d model to simulate groundwater flow, heat, brine and radionuclide transport
SWIFT Categories: flow models - pathlines/capture zones, fractured systems models, heat transport, saltwater intrusion models, solute transport models - saturated zone
Three-Dimensional Groundwater Flow and Transport
Pressure, Temperature, Brine, Radionuclides
Dual Porosity and Fractured Media
Introduction to SWIFT
SWIFT for Windows is a fully transient, three-dimensional model which simulates the flow and transport of fluid, heat (energy), brine, and radio nuclide chains in porous and fractured geologic media. The primary equations for fluid, heat, and brine are coupled with fluid density, fluid viscosity, and porosity. Steady-state options are available for the fluid and brine equations, and both Cartesian and cylindrical coordinate systems may be used. However, the latter system is restricted to two-dimensional, r-z simulations. Both dual-porosity and discrete-fracture conceptualizations may be considered for the fractured zone. Migration within the rock matrix is characterized as a one-dimensional process.
Discretization is performed by the finite-difference method using centered or backward weighting in the time and space domains. Matrix solution is performed either by Gaussian elimination or by two-line successive overrelaxation.
SWIFT comprises the four transport processes: fluid, heat, brine and radionuclide chains. For porous media, only the global (three-dimensional) process simulator is used. For fractured media, the global process simulator is used for the fractured media, and the local (one-dimensional) process simulator is used for the rock matrix.
A variety of boundary conditions and source terms may be invoked for both the porous and fractured media. These include:
SWIFT can be applied to a variety of groundwater problems ranging from simple well flow to complex transport analysis.
SWIFT for Windows is a 32-bit application intended for use on the Windows 95/98/2000/NT operating systems. Running SWIFT for Windows is easy with the interface which prompts the user for the data set to simulate, tracks the progress of the simulation and lists the output files created
Postprocessor Interface (UNSWIFT) Contour maps of pressure, temperature, brine, concentration in any window in any plane can be quickly processed directly into uniformly-spaced grid files for the Surfer contouring software.
Allows transient flowpath evaluation of streamlines and export to Surfer as lines or posted symbols.
The Windows Runtime Monitor displays essential simulation while the simulation is running. The Windows Runtime Monitor tracks the simulation progress, highlighting the current program activity at the base of the screen. The time step, interval and other data are updated on the screen through the course of the simulation. Below the frame, system RAM requirements, matrix convergence (L2SOR only), creation of map file, and error messages are displayed. Auxiliary files for restart or binary input are also prompted.
SWIFT BASIC PACKAGE
Pentium with 32+ MB RAM and Lahey LF95 compiler, and Surfer for postprocessing graphics
Technical support is limited to installation and initial use. Advice, analysis and suggestions for improvement of model applications and use may be provided only under separate contract. Client confidentiality is maintained.
Scientific Software Group
P.O Box 708188 Sandy, Utah 84070
Phone (801) 208-3011 or Toll Free (U.S.) 1-866-620-9214 Fax (801) 302-1160 E-mail email@example.com
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