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Chapter 23.Appendix B. Opening FDS v5 and PyroSim v2012 Files
The following items will be dropped from the Reaction record:
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Under the Fuel tab, Mass Fraction of Fuel in Burner
Under the Fuel tab, Other atoms
Under the Fuel tab, Molecular Weight
Under the Fire Suppression tab, Limiting Oxygen Index
Under the Heat Release Rate tab, Use Eddy Dissipation model for heat release rate
Under the Heat Release Rate tab, C (C_EDC)
Under the Byproducts tab, Hydrogen Fraction
Under the Soot tab, Hydrogen Fraction
Under the Soot tab, Maximum Visibility
Under the Soot tab, Mass Extinction Coefficient
Under the Fuel tab, Ambient Oxygen Mass Fraction has moved to Simulation Parameters
Surfaces
Surfaces have undergone relatively few changes in from PyroSim 2012 to PyroSim 2013. However, a
number of items are no longer supported in the new version. The following records will be dropped:
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A surface of type Fan will no longer set the FDS variable POROUS = .TRUE.
Under the Surface Props tab, Porous
Under the Surface Props tab, Surface Density
Under the Air Duct tab, Enable Air Duct
Under the Air Duct tab, Duct Path
Under the Air Duct tab, Maximum Over-pressure
Under the Air Leak tab, Porous
Particles
Unlike PyroSim 2006, PyroSim 2007 requires that every layered surface specify a thickness (Delta) for
each layer and that materials specify density (Rho), specific heat, and conductivity (C). In PyroSim 2006,
there were a number of ways for thermally thin surfaces to either specify or omit these parameters.
These surfaces allowed any one or more of C, Delta, and Rho to be specified in addition to C*Delta*Rho.
PyroSim 2007 will make a best-effort calculation of missing parameters. For instance, if C*Delta*Rho is
specified along with two of the parameters, the third will be calculated; however, if more than one
parameter is missing, PyroSim will use defaults for up to two of the parameters and calculate the third
missing one. The default thickness for thermally thin surfaces is set to 1mm. In all cases where a default
number has been assumed due to a missing parameter, a warning will be shown for the parameter.
In PyroSim 2013, the interaction between particles and species has changed significantly. In PyroSim
2012, a particle could be attributed various Thermal Properties and Fuel Properties. Most of these
variables have since been moved to the species object.
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