Topics relate to Fluent, CFX, Turbogrid and more

Flame Generated Manifold (FGM) model

    • Naiara


      I am doing a combustion simulation with FGM model and  the following characteristics:

      1- Non-premixed combustion with heat loss

      2-Fuel CH4 at 446K

      3 Oxidizer preheated at 843K.

      When selecting combustion model I choose the options of the attached images.

      In Boundary conditions I define in fuel Mixture Fraction =1.

      In Materials I modify absorption coefficient

      I patch progress variable to 1, and I obtain the temperature contour attached. Something seems to be not working at flame shape is to small. Any suggestion?

      Thank you in advance!

    • raghava

      I would try changing the "Turbulence chemistry interactions" to Turbulent flame speed to incorporate the effects of turbulence or is there any specific idea behind setting TCI to Finite rate? I hope this helps.


      Raghavendran Raman 

    • seeta gunti
      Ansys Employee

      Hello Naira,

      How are you measuring the flame shape? By just looking at the temperature plot, it does not give you the flame shape. Since you are using FGM, you can plot the mean mixture fraction of any particular species that is supposed to be there in fuel rich or oxidizer rich zone.





    • sreeraogubba
      Hi SeetanThis is sreenivas, while at GE we have interacted. Do you have a FGM tutorial that can help users to go through it?.Thanks in AdvancenSreen
    • YasserSelima

      I am using premixed FGM model. I have a query regarding selection of source term for turbulent chemistry interaction in FGM. Fluent gives two options one is finite rate and another one is turbulent flame speed apparoach. I have read few literatures where they suggested that there is another approach of defining a source term for TCI is min (Finite rate, Turbulent flame speed). 

      Can anyone suggest how to avail this third option ? I am unable to see on the use interface. Is there anyway to do it using TUI commands ?

      Any hep is higly appreciated. 

      Thanks & Regards 


    • Rob
      Forum Moderator

      If the model is talking about source terms it's potentially UDF based. Are there any further details in the literature you've been reading? 

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