[xuegy]

Hello all,

I need to override the following boundary condition to "zeroGradient":

sidewall
    {
     	type            calculated;
        value           nonuniform List<scalar>
1914
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....

and I've tried these ways:
1. Manually edit the file. It works, but I want to do it automatically.
2. Use setExprBoundaryFields utility

pattern
{
    field   N1;
    expressions
    (
        {
            patch   sidewall;
            target  type;
            expression zeroGradient;
        }
    );
    keepPatches  true;
}

gives me

Processing field N1


--> FOAM FATAL IO ERROR: (openfoam-2112)
Wrong token type - expected string, found on line 25: word 'zeroGradient'

file: system/setExprBoundaryFieldsDict.pattern.expressions.expression at line 26.

    From Foam::Istream& Foam::operator>>(Foam::Istream&, Foam::string&)
    in file primitives/strings/string/stringIO.C at line 53.

FOAM exiting

3. Use funkySetBoundaryField utility

Stress
{
    field N1;
    expressions
    (
        {
            patchName  sidewall;
            target     type;
            expression zeroGradient;
        }
    );
}

gives me (basically the same error)

Part: Stress working on field N1


--> FOAM FATAL IO ERROR: (openfoam-2112)
Wrong token type - expected string, found on line 25: word 'zeroGradient'

file: system/funkySetBoundaryDict.Stress.expressions.expression at line 25.

    From Foam::Istream& Foam::operator>>(Foam::Istream&, Foam::string&)
    in file primitives/strings/string/stringIO.C at line 53.

FOAM exiting

From here, https://develop.openfoam.com/Develop.../-/issues/1762

upcasting of word to string/fileName was added August-2019.

So is that a bug? or are these utilities simply can't change the boundary type?

Many thanks.

[Yann]

Hi,

It sounds like a job for changeDictionary: https://www.openfoam.com/documentati...ictionary.html

Cheers,
Yann