README FOR PAC

We are currently using a version of PAC called PAC99. Some input features will be

a little different than those described in the manual, NASA RP-1271, 1992, available

from the website http://www.grc.nasa.gov/WWW/CEAWeb/. Also atomic weights,

fundamental constants, and some of the examples have been updated.

Please let us know if you have any difficulties.

The FORTRAN source and data are ASCII files in our anonymous FTP server available

at the following URL:

ftp://ftp.grc.nasa.gov/users/xxminna/CEA+Fortran/pac/

The files you should have downloaded are:

readme.pac

pac99.f

new.groups

EFdata.i97

exp.i97

exp.o97

exp.c97

exp.e97

The root names of these files are referred to as prefixes. File names have extensions

(suffixes) defined as follows:

Fortran source programs - .f

Input files - .i97

General output listing with tables - .o97

Coefficients in latest thermo data format - .c97

Element data used in calculating ∆fH˚ and LogK - .e97

The “.e97” file will be used only for elements and then only if the option is called for in

the “i97” file. Coefficients output “.c97” is also an option.

General information to get started:

· Compile the fortran program pac99.f. Note that compilers are freely

available from the internet.

· Type in the name of the executable. PAC99 will ask for the name of the input prefix.

· The first input file should the EFdata.i97. PAC99 will make a binary file unf.EFdata

to be used for the heat of Formation ∆fH˚ and LogK calculations in the tables.

· The file new.groups must be available for the group additivity option. It is not a binary file.

· Run the sample problems exp.i97 and check the output files.

To get thermodynamic properties of individual species for the NASA Glenn coefficients database

or to download subsets of this data, go to the following URL and see “About ThermoBuild”

for details.

http://cea.grc.nasa.gov/

If you have any comments or questions, please contact Russell.W.Claus@nasa.gov