totalFlowRateAdvectiveDiffusive BC with RAS Model

EMM · November 2, 2018, 07:36

I'm trying to use the totalFlowRateAdvectiveDiffusive boundary condition for the fuel zone in a combustion case including fuel pyrolysis. I took as a reference the oppositeBurningPanels tutorial, but when I change the turbulence model to kEpsilon (RAS) I get this error:

--> FOAM FATAL ERROR:
lookup of turbulenceProperties from objectRegistry region0 successful
but it is not a LES, it is a kEpsilon

Has someone ever had the same problem and managed to solve it?
I really appreciate the help or ideas to deal with this.

Archana V · April 25, 2019, 06:45

Hi,
You can use RANS model by making simple change in the code. In order to use RANS model you have to edit totalFlowRateAdvectiveDiffusiveFvPatchScalarField. C. In OpenFOAM-6, edit line number 157
original code:
const LESModel<EddyDiffusivity<compressible::turbulenceM odel>>& turbModel = db() . lookupObject<
LESModel<EddyDiffusivity<compressible::turbulenceM odel>>
>
Modify this statement as given below.

const compressible::turbulenceModel& turbModel = db() . lookupObject<compressible::turbulenceModel>

Copy this code in your user directory and make changes accordingly. Then you can compile the library function using wmake libso. For using this new boundary condition, you have to specify in your controlDict file.

November 2, 2018, 07:36	totalFlowRateAdvectiveDiffusive BC with RAS Model	#1
EMM New Member Esteban Maya Join Date: Jun 2016 Posts: 1 Rep Power: 0	I'm trying to use the totalFlowRateAdvectiveDiffusive boundary condition for the fuel zone in a combustion case including fuel pyrolysis. I took as a reference the oppositeBurningPanels tutorial, but when I change the turbulence model to kEpsilon (RAS) I get this error: --> FOAM FATAL ERROR: lookup of turbulenceProperties from objectRegistry region0 successful but it is not a LES, it is a kEpsilon Has someone ever had the same problem and managed to solve it? I really appreciate the help or ideas to deal with this.

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April 25, 2019, 06:45		#2
Archana V New Member Join Date: Dec 2015 Posts: 20 Rep Power: 11	Hi, You can use RANS model by making simple change in the code. In order to use RANS model you have to edit totalFlowRateAdvectiveDiffusiveFvPatchScalarField. C. In OpenFOAM-6, edit line number 157 original code: const LESModel<EddyDiffusivity<compressible::turbulenceM odel>>& turbModel = db() . lookupObject< LESModel<EddyDiffusivity<compressible::turbulenceM odel>> > Modify this statement as given below. const compressible::turbulenceModel& turbModel = db() . lookupObject<compressible::turbulenceModel> Copy this code in your user directory and make changes accordingly. Then you can compile the library function using wmake libso. For using this new boundary condition, you have to specify in your controlDict file.