Rotating square on icoFoam cavity
 

Hi Foamers,

I inserted an obstacle in the icoFoam/cavity case and to see what happens when it rotates I've included dynamic mesh effects on icoFoam.

The thing is: The square rotates correctly, but the problem is that the mesh rotates with it, and that produces a bad mesh quality (severe non-orthogonality). I would like the mesh to just stretch and contract as the square rotates. I mean, I don't want the points attached to the square to rotate.
To better explain: When you look at the mesh in the wireframe form on paraView, I want the horizontal wires to keep their y(vertical) position and move (expand or contract) horizontally as the square rotates, and I want the vertical wires to keep their x (horizontal) position and move (expand or contract) vertically as the square rotates.

I attach an image to show my resulting mesh behavior, which is what I don't want.

How can this be achieved? Attach/detach? Sliding interface?

Thanks and regards!

All the best

Well, what I finally did is rotate a small angle and re-blockMesh with the position of the new points. Then interpolated results to the new mesh and rotate a bit more and repeat the process several times.

I used moveDynamicMesh to check mesh validity, to assure the rotated angle at each part does not destroy the mesh.

Any better ideas?

Thanks and regards!