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6.0 Output
GnuRad has five standard output files. Four are created in the TEMPERATURE
mode, and one is created in the VIEW mode. All of the files can be
identified by the three letter extension which is automatically placed on by
GnuRad.
TEMPERATURE mode
output.tbl - Tabular format.
output.tgr - Text graphics format.
output.csv - Comma separated variable format.
output.plt - Plot file format.
VIEW mode
output.vwf - View factor or radiation interchange factor summary format.
Tabular Format
The Tabular format is always printed when GnuRad is run in the TEMPERATURE
mode. When no output file name is specified, the tabular format is printed
to the screen. The tabular format gives complete information about the model;
first the basic information is reported, such as the local geometry, wall or
media type, and the energy of a photon bundle. If the wall or media
temperature were initially unknown, information about iteration parameters are
also given. Next, information about the elements which make a wall or the
media are reported in a tabular format. This includes the initial temperature,
the number of bundles sent, the number of bundles received, the temperature
based on number of bundles received, and the net flux. After the tabular
information of the elements, the net flux of the wall or media is reported.
Finally, The net flux of the entire model is reported at the end of the file.
If all went well, this value should be approximately zero. This indicates that
all the bundles were properly tracked. An example of the tabular format file
is shown below. Note, descriptive comments have been placed curl braces.
Text-Graphic Format
The text-graphic format is an ASCII text file which is formatted to look like
graphics. When viewing this file or printing it, the text characters should be
fixed width. A sample of the file is shown below. Note, descriptive comments
have been placed inside the sample file and are shown in italic character.
Comma Separated Variable Format
The "csv" formatted file allows output from GnuRad to be used as
input to a spreadsheet program, such as Xspread, MS Excel, or Lotus 123. A
sample of this file is shown below. This file is not designed for direct
viewing, but should be loaded first into a spreadsheet where the commas are
used to separate the information into the proper cell. Once imported into a
spreadsheet, the format is similar to the tabular format file.
Plot Format
This file allows the unknown wall or walls to have their temperatures and or
fluxes plotted by the program "GNUPLOT". The original output file
will need to be separated into two files. The first file should contain the
information on how GNUPLOT is to plot the data; it is currently set to plot a
3-D contour plot. The second file should contain only the numerical data; a
commented line in the output file will tell you where the data begins and
ends. Finally, the reader should obtain the GNUPLOT user manual, since it will
tell much more information on what types of plots can be produced.
View Factor &Radiation Exchange Factor Format
The view factor or radiation exchange factor format file is created when
GnuRad is in VIEW mode and an output file is specified when GnuRad is
executed. The format of this file is similar to the tabular format but with
the following exceptions. The wall type is either 'R', 'S', or 'P'. 'R'
signifies it is a receiving wall and it is used in the calculation of the view
or radiation exchange factor. 'S' signifies it is s sending wall and it is
used in the calculation of the view or radiation exchange factor. Finally, 'P'
signifies the wall participates in the model but the bundles it receives are
not used in the calculation of the view or radiation exchange factor.
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