[Tobi]

Hi all (dear Bernhard),

I try to use groovyBC with dynamicMesh in the pointMotionU file but I get a problem. The boundary condition itself is working but if I apply groovy I have no mesh smoothing with the laplacian solver anymore. Means my points at the surface are moved but the internal mesh is not smoothed anymore.

Here is some simple BC:

    movingWall
    {
        type            groovyBC;
//        value           uniform 0.1; //groovyBC;

        variables
        (
            "v=(time() < 60 ? 0.1 : 0);"
        );

        fractionExpression      "1";
        gradientExpression      "0";
//        valueExpression         "toPoint(v)";
        valueExpression         "toPoint(0.1)";
        value                   uniform 0.1;

At least I apply 0.1 m/s in y-direction (component laplacian method) but the interior mesh is not moving.

Additionally, - only as a question - why is groovy outputing the weighting factors and points which are used for interpolation? Any reason, or was that for debugging?

If there is a solution please let me know.
At the moment I switched to the codedFixedValue (where everything is working fine).

[alfa_8C]

Hi,

I am experiencing a similar problem.

When I apply a constant velocity for mesh motion normal to the Z axis in my pointMotionUz file, and a slip BC to all walls parallel to the Z axis, the mesh is moved incrementally over all cells over Z, which is right.

As soon as I run the same case, but by applying a groovyBC instead of a constant value, only the cell layer ist stretched, which is in contact with the face set defined with the groovyBC expression (see picture). Is there any solution for this?

Thanks in advance for your effort.

Problem solved: http://www.cfd-online.com/Forums/ope...-groovybc.html