Learning Forum

[e226180]

I am currently working on a partially premixed combustion case in Fluent using the FGM (Flamelet Generated Manifold) model.

I imported the GRI-Mech 3.0 mechanism into Fluent from the official source:
http://combustion.berkeley.edu/gri-mech/version30/text30.html#thefiles

Specifically, I used the following files:

• grimech30.dat → for the reaction mechanism

• thermo30.dat → for thermodynamic properties

• transport.dat → for transport properties

  However, after importing these files into Fluent, I received the following warning(with both for the flamelet mixture and for several -I think- intermediate reaction products. but I only put one of them) :

  Material flamelet-mixture:
    Changing method of "Thermal Conductivity" to "constant" -- data required.
    Changing method of "Viscosity" to "constant" -- data required.
  Done.
  It seems that Fluent did not assign the thermal conductivity and viscosity values from the transport data file, even though the file was selected and imported properly.

  My question is:
  Did I make a mistake in the way I structured or selected these files?
  Or does Fluent require additional formatting or a different version of the transport file to read viscosity and conductivity correctly?

  I would appreciate your clarification or any suggestions on how to resolve this issue.