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-   -   Eddy dissipation concept for turbulent combustion modeling (https://www.cfd-online.com/Forums/openfoam-solving/190720-eddy-dissipation-concept-turbulent-combustion-modeling.html)

sahmed July 20, 2017 14:06
Eddy dissipation concept for turbulent combustion modeling
 
Dear Foamers
Could anyone PLEASE give me an idea from your experience if any of the default OF versions have solver with eddy dissipation concept to simulate turbulent combustion. Or anything close to eddy dissipation model?
I know turbulent modeling in combustion is a hot topics and I am pretty sure many of us have experience on implementing ED concept in OpenFOAM.
Thanks in advance.

Sheikh Ahmed

arvindpj July 21, 2017 10:29
EDC in OpenFOAM-dev
 
EDC models are available in the OpenFOAM-dev branch. Below is the description in the EDC.c file.

Cheers :-)
Jay


Code:

Description
    Eddy Dissipation Concept (EDC) turbulent combustion model.

    This model considers that the reaction occurs in the regions of the flow
    where the dissipation of turbulence kinetic energy takes place (fine
    structures). The mass fraction of the fine structures and the mean residence
    time are provided by an energy cascade model.

    There are many versions and developments of the EDC model, 4 of which are
    currently supported in this implementation: v1981, v1996, v2005 and
    v2016.  The model variant is selected using the optional \c version entry in
    the \c EDCCoeffs dictionary, \eg

    \verbatim
        EDCCoeffs
        {
            version v2016;
        }
    \endverbatim

    The default version is \c v2015 if the \c version entry is not specified.

    Model versions and references:
    \verbatim
        Version v2005:

            Cgamma = 2.1377
            Ctau = 0.4083
            kappa = gammaL^exp1 / (1 - gammaL^exp2),

            where exp1 = 2, and exp2 = 2.

            Magnussen, B. F. (2005, June).
            The Eddy Dissipation Concept -
            A Bridge Between Science and Technology.
            In ECCOMAS thematic conference on computational combustion
            (pp. 21-24).

        Version v1981:

            Changes coefficients exp1 = 3 and exp2 = 3

            Magnussen, B. (1981, January).
            On the structure of turbulence and a generalized
            eddy dissipation concept for chemical reaction in turbulent flow.
            In 19th Aerospace Sciences Meeting (p. 42).

        Version v1996:

            Changes coefficients exp1 = 2 and exp2 = 3

            Gran, I. R., & Magnussen, B. F. (1996).
            A numerical study of a bluff-body stabilized diffusion flame.
            Part 2. Influence of combustion modeling and finite-rate chemistry.
            Combustion Science and Technology, 119(1-6), 191-217.

        Version v2016:

            Use local constants computed from the turbulent Da and Re numbers.

            Parente, A., Malik, M. R., Contino, F., Cuoci, A., & Dally, B. B.
            (2016).
            Extension of the Eddy Dissipation Concept for
            turbulence/chemistry interactions to MILD combustion.
            Fuel, 163, 98-111.
    \endverbatim

Tutorials cases provided: reactingFoam/RAS/DLR_A_LTS, reactingFoam/RAS/SandiaD_LTS.

sahmed July 21, 2017 10:37
EDC tutorial/manual
 
Thank you very much Arvind for your reply. Have you ever used that? Could you give me any tutorial/manual on that?

arvindpj July 21, 2017 10:45
Quote:
Originally Posted by sahmed (Post 657947)
Thank you very much Arvind for your reply. Have you ever used that? Could you give me any tutorial/manual on that?

Tutorials cases provided with openFOAM-dev

Code:
reactingFoam/RAS/DLR_A_LTS, reactingFoam/RAS/SandiaD_LTS


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