Users guide for SIMSOL (Version 1. 0) Page: 4 of 52
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I. INTRODUCTION
SIMSOL calculates temperature, pressure, saturation, and air-mass fraction in a uniform
geologic medium surrounding a linear heat source. The theory on which this program is based is
described in the papers “A similarity solution for two-phase fluid and heat flow near high-level
nuclear waste packages emplaced in porous media” [Doughty andPruess, 1990] and “A similar-
ity solution for two-phase water, air, and heat flow near a linear heat source in a porous medium”
[Doughty and Pruess, 1991]. This users guide does not duplicate the information contained in
these two papers, and will be difficult to read without a knowledge of their content. *■
A flow chart for SIMSOL is shown in Figure 1. The input for SIMSOL is described in Sec-
tion II, followed by guidelines for running the program in Section III, and listings of input and
output files for sample calculations in Section IV. Numerous examples of the graphical output of
SIMSOL may be found in Doughty andPruess [1990,1991].
SIMSOL is written in FORTRAN. It was developed on a Cray 2 at the National Energy
Research Supercomputer Center (NERSC) at Lawrence Livermore National Laboratory (LLNL),
It has also been tested on a Cray X-MP at NERSC and a VAX 6420 running VMS at Lawrence
Berkeley Laboratory (LBL). The equation of state subroutines that describe thermophysical fluid
properties as a function of temperature and pressure are essentially the same as those found in the
numerical simulator TOUGH2 [Pruess, 1987, 1991]. The SIMSOL algorithm allows the
specification of a linear heat sink or mass source or sink as well as a linear heat source, but these
options have not been tested.
The SIMSOL source code and sample-calculation files are available on diskette or tape.
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Doughty, C. Users guide for SIMSOL (Version 1. 0), report, August 1, 1991; [Berkeley,] California. (https://digital.library.unt.edu/ark:/67531/metadc1093831/m1/4/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.