[Gioralex]

Hello everyone, I am a Mechanical Engineering student working on my thesis.


I am new with OpenFoam and I have a problem in choosing a combustion solver.


My task is to study a premixed combustion in a quiescent chamber. So my question is: what's the appropriate combustion solver to use ?



Any help is appreciated.




Thank you in advance. Regards

[random_ran]

I just copy paste some introduction from of/7

PDRFoam
-------
    Solver for compressible premixed/partially-premixed combustion with
    turbulence modelling.

    Combusting RANS code using the b-Xi two-equation model.
    Xi may be obtained by either the solution of the Xi transport
    equation or from an algebraic expression.  Both approaches are
    based on Gulder's flame speed correlation which has been shown
    to be appropriate by comparison with the results from the
    spectral model.

    Strain effects are incorporated directly into the Xi equation
    but not in the algebraic approximation.  Further work need to be
    done on this issue, particularly regarding the enhanced removal rate
    caused by flame compression.  Analysis using results of the spectral
    model will be required.

    For cases involving very lean Propane flames or other flames which are
    very strain-sensitive, a transport equation for the laminar flame
    speed is present.  This equation is derived using heuristic arguments
    involving the strain time scale and the strain-rate at extinction.
    the transport velocity is the same as that for the Xi equation.

    For large flames e.g. explosions additional modelling for the flame
    wrinkling due to surface instabilities may be applied.

    PDR (porosity/distributed resistance) modelling is included to handle
    regions containing blockages which cannot be resolved by the mesh.


XiEngineFoam
------------

    Solver for compressible premixed/partially-premixed combustion with
    turbulence modelling.

    Combusting RANS code using the b-Xi two-equation model.
    Xi may be obtained by either the solution of the Xi transport
    equation or from an algebraic expression.  Both approaches are
    based on Gulder's flame speed correlation which has been shown
    to be appropriate by comparison with the results from the
    spectral model.

XiFoam
------

    Solver for compressible premixed/partially-premixed combustion with
    turbulence modelling.

    Combusting RANS code using the b-Xi two-equation model.
    Xi may be obtained by either the solution of the Xi transport
    equation or from an algebraic expression.  Both approaches are
    based on Gulder's flame speed correlation which has been shown
    to be appropriate by comparison with the results from the
    spectral model.

    Strain effects are encorporated directly into the Xi equation
    but not in the algebraic approximation.  Further work need to be
    done on this issue, particularly regarding the enhanced removal rate
    caused by flame compression.  Analysis using results of the spectral
    model will be required.

    For cases involving very lean Propane flames or other flames which are
    very strain-sensitive, a transport equation for the laminar flame
    speed is present.  This equation is derived using heuristic arguments
    involving the strain time scale and the strain-rate at extinction.
    the transport velocity is the same as that for the Xi equation.

chemFoam
--------

    Solver for chemistry problems, designed for use on single cell cases to
    provide comparison against other chemistry solvers, that uses a single cell
    mesh, and fields created from the initial conditions.

coldEngineFoam
--------------
    Solver for cold-flow in internal combustion engines.

fireFoam
--------
    Transient solver for fires and turbulent diffusion flames with reacting
    particle clouds, surface film and pyrolysis modelling.

reactingFoam
------------
    Solver for combustion with chemical reactions.

[Gioralex]

Hi random_ran ! Thank you so much for your rapid answer.

So PDRFoam and XiFoam seem apparently to be equal. Do you think XiFoam is appropriate for my study in order to analyze the premixed combustion process in a quiescent chamber ?

I would like to vary the initial conditions in terms of pressure, temperature and equivalence ratio and determine the output pressures and temperatures inside the chamber as well as the flame front propagation.

thank you in advance

[Gioralex]

Nobody ? Is there anyone else who could answer my questions ?

Any help is appreciated.

Thank you for your time