- A run-time monitor displays the simulation progress,
convergence, mass balance, and dialog.
- Versatile interface to SURFER for contouring pressure,
temperature and concentration.
- Extensive error checking.
- Auxiliary files for variable structure grid, restart, mapping,
mass balance, well summary and concentration discharge.
- STLINE code for particle tracking.
- Easy installation, 70 verification QA/QC data sets.
SWIFT BASIC ASSUMPTIONS AND
- Single-phase fluid flow governed by Darcy's law
- Three-dimensional transport in the global system, and
one-dimensional transport in the local rock matrix subsystem
- Local rock matrix may be characterized by either prisms or
- Linear variations in porosity and fluid density with respect
to the dependent variables
- Viscosity is dependent on temperature and brine concentrations
- Nonlinear isothermal equilibrium adsorption (Freundlich or
- Injection wastes are miscible with the resident fluids
- Confined or unconfined aquifer (transient or steady-state free
- Hydraulic and thermal conductivities may be heterogeneous
- Longitudinal and transverse dispersivities may vary throughout
- Variable rock compressibility (storativity)
- Dual or simultaneous discretization
SWIFT METHOD OF
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
A variety of boundary conditions and source terms may be
invoked for both the porous and fractured media. These include:
- Prescribed pressure (head), temperature, and brine
- Prescribed flux of fluid (water), heat, brine, or nuclide mass
- Wellbore injection/production submodel subject to pumping
- Aquifer influence function (i.e., Carter-Tracy infinite
- Dual porosity domain extension
- Waste-leach radionuclide submodel for waste repository
nuclides and heat
- Freewater surface with recharge
SWIFT can be applied to a variety of groundwater problems
ranging from simple well flow to complex transport analysis.
- Deep well injection of hazardous waste,
isothermal/nonisothermal, constant/variable density
- Hazardous waste site characterization and remediation (RI/FS)
- Pump-and-treat, hydraulic containment and other waste
- Saltwater intrusion, upconing
- Aquifer thermal energy storage
- High-level radioactive waste performance assessment
- Fractured media, dual porosity
Postprocessor Interface (UNSWIFT) - Contour maps of
pressure, temperature, brine, or concentration in any window in any
plane can be quickly processed directly into uniformly-spaced grid
files for the SURFER contouring software.
SWIFT STLINE PARTICLE
Allows transient flowpath evaluation of streamlines and
export to SURFER as lines or posted symbols.
The runtime monitor displays essential simulation data on a
conventional PC monitor using standard ANSI characters. The 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 Data Input Guide
- SWIFT and SWIFT II documents (4 publicly available NTIS
- All FORTRAN source code and 70 verification problem input and
output data sets on diskettes
With sufficient memory resources,
SWIFT can be used to model complex field applications at a
reasonable price. SWIFT users can choose either support or
nonsupported. Optional training is available.
Requirements: Pentium with 32 MB
RAM and Lahey LF90 Version 4.5 compiler, and Surfer for