FDS did not finish the calculation. What happened?
An FDS calculation may end before the user-prescribed time limit. There are several reasons this might happen: • A numerical instability develops which typically increases the magnitude of the flow velocity and decreases the time step size to a point where logic in the code dictates that the results are unphysical and stops the code with an error message indicating that the time step has decreased too much. FDS will end by dumping out one final PLOT3D file which gives the user some means by which to see where the error is occurring within computational domain. • The calculation might be using more RAM than the machine has, or the output files could have used up all the available disk space. In these situations, the computer may or may not produce an intelligible error message. In some cases, the program will simply appear to have hung. Sometimes the computer will just seem unresponsive. It is the user’s responsibility to ensure that the computer has adequate resources to do the calcula
