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setFieldsDict for spatially varying field

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Old   October 9, 2017, 09:17
Default setFieldsDict for spatially varying field
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Hi all, I was hoping someone could shed some light.

I am looking to create a scalar field that varies linearly as a function of space and would like to know if there's a way to do it through setFieldsDict.

I am using OF v4.1 on ubuntu 16.06 so unfortunately swak4foam isn't available for me without a complete overhaul.

Any help would be deeply appreciated.
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Old   November 15, 2017, 21:11
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John Anonymous
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Hi Joanne

Not sure if this is what you are looking for but this post may assist:
VOF initialization with a STL file (closed volume)

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Old   November 16, 2017, 14:18
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A while ago I used this snippet for setting a parabolic boundary condition for U at the inlet:

        type            codedFixedValue;
        value           uniform (0 0 0);
        redirectType    parabolaProfile;   

            const fvPatch& boundaryPatch = patch();
            const vectorField& Cf = boundaryPatch.Cf();

            vectorField& field = *this; 
            scalar uave = 10;
            scalar h = 5e-3;
            scalar vel;

            forAll(Cf, faceI)
                vel = 6 * uave / (h*h) * (h * Cf[faceI].y() - Cf[faceI].y() * Cf[faceI].y());
                field[faceI] = vector(vel, 0, 0);
You can use a similar approach.
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setfields, setfieldsdict, spatial variation

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