FDS improperly set-up

[Bogdan]

      Dear sir,

I'm new in FDS and i want to run a sample scenario to see what's the activation time for two sprinkler heads placed in a 6 m x 9 m fire compartment. Initially I have a problem with ethanol fire pool, but now it seems to be a problem that I can solve single. After I run the scenario on FDS appear an error were it's write: FDS IMPROPERLY SET-UP.

Thank you anticipate!

[dr_jfloyd]

You have an error in your input file.   

Recommend you start with say just the mesh and time inputs and slowly add back in sections of input until you get the error message again.  This will let you find where the error is.

[Bogdan]

Thank you very much Dr. Floyd for your faster response!

[Brad Casterline]

there is a problem with your DEVC at the end of the file-- I'm not sure what but if you "comment" them out, it runs. Comment out means put a "/" before the &, then one by one you could remove the "/" until you find the bad DEVC-- And it probably has to do with IOR

[Bogdan]

First I want to thank you Mister Brad CASTERLINE and second to congratulate all the people ho do this nice job. The problem was as you said at my end DEVC with IOR at wall temperature. Thanks a lot and have a nice day! Greetins from Romania.

marți, 16 septembrie 2014, 18:35:45 UTC+3, Bogdan a scris:

[Bogdan Branisteanu]

Dear Sir,

I've got a problem with a ethanol pan in my scenario. When I want to run my model it shows my that the 'Ethanol' is not a tracked species, but in FDS6 User Guide the model is with SPEC_ID. If I run it without NU_SPEC and SPEC_ID it works, but I don't have a fire. I ask you kindly if you can tell me whats the problem?

Thank you anticipate!

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[dr_jfloyd]

&REAC FUEL='ETHANOL VAPOR'

      FYI='Ethanol, C_2 H_6 O'

      HEAT_OF_COMBUSTION = 26780.

      O=1.

      C=2.

      H=6.

      SOOT_YIELD=0.008 /

Here you are telling FDS your fuel is ETHANOL vapor.

&MATL ID = 'ETHANOL LIQUID'

      EMISSIVITY = 1.0

      NU_SPEC = 0.97

      SPEC_ID = 'ETHANOL'

      HEAT_OF_REACTION=836.98

      CONDUCTIVITY=0.17

      SPECIFIC_HEAT= 2.4398

      DENSITY= 789.

      ABSORPTION_COEFFICIENT = 1534.3

      BOILING_TEMPERATURE=78.5 /

Here you are telling FDS you are evaporating ETHANOL.

The names do not match so you have two different species, the fuel you are  evaporating does not match the name in your REAC.   Since ETHANOL is a predefined species and you are using simple chemistry you don't need the SPEC line and your REAC line can just be:

&REAC FUEL='ETHANOL'

      SOOT_YIELD=0.008 /