Constant folder configuration
In the constant folder, you will usually have to check and edit three files (sometimes more depending on the solver used):
turbulenceProperties
transportProperties
turbulenceProperties
Open the text file using this command:
1
gedit constant/turbulenceProperties
This file allows you to chose the type turbulence model you will be using (laminar, Reynolds averaged...) and to select the appropriate turbulence model for your case.
1
/*--------------------------------*- C++ -*----------------------------------*\2
| ========= | |3
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |4
| \\ / O peration | Version: 5 |5
| \\ / A nd | Web: www.OpenFOAM.org |6
| \\/ M anipulation | |7
\*---------------------------------------------------------------------------*/8
FoamFile9
{10
version 2.0;
11
format ascii;
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class dictionary;
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location "constant";
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object turbulenceProperties;
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //17
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simulationType RAS;
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RAS21
{22
RASModel realizableKE;
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turbulence on;
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printCoeffs on;
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}
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// ************************************************************************* //transportProperties
Open the text file using this command:
1
gedit constant/transportProperties
This file allows to chose how your simulation will handle viscosity: Newtonian fluid or not. In case of non-Newtonian fluid, you will have to chose the appropriate rheological model.
1
/*--------------------------------*- C++ -*----------------------------------*\2
| ========= | |3
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |4
| \\ / O peration | Version: 2.3.0 |5
| \\ / A nd | Web: www.OpenFOAM.org |6
| \\/ M anipulation | |7
\*---------------------------------------------------------------------------*/8
FoamFile9
{10
version 2.0;
11
format ascii;
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class dictionary;
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location "constant";
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object transportProperties;
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //17
transportModel Newtonian;
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nu nu [ 0 2 -1 0 0 0 0 ] 1e-06;
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CrossPowerLawCoeffs20
{21
nu0 nu0 [ 0 2 -1 0 0 0 0 ] 1e-06;
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nuInf nuInf [ 0 2 -1 0 0 0 0 ] 1e-06;
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m m [ 0 0 1 0 0 0 0 ] 1;
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n n [ 0 0 0 0 0 0 0 ] 1;
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}
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BirdCarreauCoeffs27
{28
nu0 nu0 [ 0 2 -1 0 0 0 0 ] 1e-06;
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nuInf nuInf [ 0 2 -1 0 0 0 0 ] 1e-06;
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k k [ 0 0 1 0 0 0 0 ] 0;
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n n [ 0 0 0 0 0 0 0 ] 1;
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}
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// ************************************************************************* //