[Phil910]

Hi everyone!

I am setting up a channel flow with periodic boundaries in the streamwise direction. Now i am trying to use the GroovyBC on my inlet patch. My idea is simple: I want to get the velocity components from my outlet patch and use them on my inlet patch but multiply the x-Component with a factor that i calculated before. As an example i just set the factor that i want to multiply my x-Component with to 2, so my boundary condition would be the following:

inlet
    {
        type            groovyBC;
        patchType       cyclic;
        value         uniform (0 0 0);
        variables
        (
        "U_x=neighbourField(U).x;"
        "U_y=neighbourField(U).y;"
        "U_z=neighbourField(U).z;"
        "corrFactor=2;"
        );
        valueExpression
        "vector(U_x*corrFactor,U_y,U_z)";
        }

I am using the neighbourField() function to get the velocity components from the neighbourPatch of my cyclic inlet patch. Unfortunately the groovyBC doesn't work and seems to just set the inlet as an cyclic type. Whatever i write in the valueExpression seems to not get recognized.

Is there a general problem of groovyBC working on cyclic Patches?
I thought about changing the inlet patch type to patch again instead of cyclic, but then i wouldn't be able to get my velocity components from the outlet patch.

I would be very thankful for any help!