Using that hardware above, lets say I have a model with 4 meshes. When I read the user's guide, I am getting confused when they are talking about mapping to cores. I read the FDS users guide section 3.3.1, but still struggling on application.and i'm hoping someone can help! The current machine I am utilizing for smaller runs is 12 GB ram with a Xeon e5 with 4 physical cores reported in that 1 cpu. PyroSim does nothing special to run a single mesh case.I'm still trying to wrap my brain around when to use OpenMP and when to use OpenMP Threads MPI (~'MPI) in FDS/Pyrosim. Also, if you run FDS, single mesh, from PyroSim and get a different result than you do at the command line, you might want to check your FDS version. I am running the latest code base, so your results might be slightly different. In your case, you seem to be using both strategies, but with the left wall, you are creating a problem. However, if you want to open and close doors and windows, provide about 1 m of distance between the wall and the exterior of the domain, and specify OPEN boundary conditions on the exterior.

If you are only interested in simulating the interior of an enclosure, the exterior boundary of the domain can serve as the external wall of the enclosure.

You then open or close a door by removing or adding an obstruction. Your left wall abuts the exterior boundary of the computational domain.

Fds pyrosim