GUST v2 User Tips

Execution Examples of GUST

• To run GUST's graphical user interface:
  • gust
• To run GUST's flow solver:
  • gust --solve -i problem.inp
  • gust -s -i problem.inp
• To show command line help:
  • gasp --help
  • gasp -h

Environment Variables

• AEROSOFT_HOME --> Sets the AeroSoft Home directory.
• AEROSOFT_ELMHOST --> Directs the search for a license key to a specific mahcine.
• ELMTIMEOUT --> Sets the time out (in seconds) for the license manager. Default is 15 seconds. When the flow solver goes to check for a connection with the server, this is how long it waits before timing out.
• ELMRETRIES --> Sets the number of retries for the time out. Default is 2 retries.

Chemistry Database

• The Version 2 database is not compatible with Version 1.0.
• To convert a Version 1.0 database to Version 2, run the Version 2 DBASEMGR and read in the database. When you save, the new database file will be in Version 2 format.
• GUST Version 2 and GASP Version 4 have compatible databases.

Run Definition

• With a strong shock, it may be best to use a combination of local and freestream CFL. A freestream CFL will help converge the shock location, but a local CFL will converge the viscous layer faster.
• Running in parallel with Lam MPI will start processes in the order of the bhost file, and if you run more procs than in the file it will circle back onto the beginning.
• SGI machines may need to set the environment variable MPI_GROUP_MAX when running in parallel.

AeroSoft, Inc. 2000 Kraft Drive, Suite 1400 Blacksburg, VA 24060 (540) 557-1900 Fax (540) 557-1919 Email questions@aerosoftinc.com