[ALU]

Hi!

For a dynamic mesh I need a boundary condition where I can define the movement of every point of the patch through its point coordinates (for example the z-value).

I would like to use the codedFixedValue boundary condition, but in the code example is only shown how to make time-varying functions.

Any help is appreciated!

[ALU]

I'm now trying to use groovyBC to define the movement of the patch points.

    top
    {    
        type groovyBC;
        valueExpression "vector(toPoint(0),toPoint(0),pts().x)";
        value uniform (0 0 0);
    }

The points on the boundary are moving correctly as defined, but the internal field is not moving.

It works perfectly if I define the list of the points motion myself

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    {    
        type fixedValue;
        value nonuniform List<vector>
(
(    0    0    0    )
(    0    0    5    )
(    0    0    5    )
(    0    0    0    )
(    0    0    5    )
...
)
    }

but I would prefer either to use "codedFixedValue" or "groovyBC" for more flexibility.

[ALU]

I finally got it working using codedFixedValue:

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    {
        type            codedFixedValue;
        value           uniform (0 0 0);
        redirectType    myFixedValue;   // name of generated bc

        code
        #{
            const pointPatch& p = this->patch();
            pointField p0 = p.localPoints();
            vectorField myMotion = p0;
            forAll(p0, i)
            {
                myMotion[i] = vector(0,0,1)*p0[i].x();
            }

            operator==
            (
                myMotion
            );
        #};        
    }