[rietis]

Here I got a little bit father. I put zerogradient for outlet and it reduce significant the anomoly, but it is still there, I think it should be like that.

Here is the next think I want to make a profile for inlet.
In the attachment there are two files. One is showing the inler place and the other the profile.

In the picture which shows the inlet area is positioned in yz plane, and in the other it is zx plane.

I want that the profile is with these condition:
1) It is normal to yz plane so it is in the n (1 0 0) direction.
2) First I would like to make it z^4. (shown in the picture)
3) How would I be able to see the prfile after in the mesh?

How do I make it to the normal in x-direction? Here is my code (which is not finished), but is this how can I do it?

    inlet 
    { 
           type                           groovyBC;         
   variables                 "fz=pos().z^4;"; 
   valueExpression "vector(fz,0,0)";     
}

It looks to simple, and not right as well.