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Fixed Value BC with operations with fields

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Old   May 31, 2021, 08:10
Post Fixed Value BC with operations with fields
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Hello everybody

I am a newbie in OpenFOAM trying to develop a boundary condition derived from fixedValue. I would like to impose a value for a field, let's say D, such as each face of the boundary patch assumes the value:
D[faceI] = D.oldTime()[faceI] + DD[faceI]
Where DD is the field representing the increment of D over the past time-step.

Have you got any suggestions on how I can approach this simple problem?

Thank you for any help/suggestion !
- elb


To be more precise in my request, what I've tried to do is modifying the updateCoeffs() function from one of the existing derived BC from fixedValue in the following way:
void calculateTotalField::updateCoeffs()
    if (this->updated())

    const volVectorField& Dold =

    const volVectorField& DD =
    vectorField disp;
    disp = Dold.boundaryField()[patch().index()] + DD.boundaryField()[patch().index()];


Is this a valid solution?


Last edited by elb31; June 1, 2021 at 04:48. Reason: Increased level of detail in the posed question.
elb31 is offline   Reply With Quote


boundary condition, fixedvalue, incremental, openfoam

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