Reply To: Coordinate system at each point of a surface

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Hi Peter!
I sincerely apologise for the delayed answers and for the reduced information I provided! I know that you are doing your best to help!
Actually it is a thermal problem. I have an irregular geometry and I want to assign the anisotropic properties of the material depending on the location of the elements.
Imagine an elipsoidal type of geometry. I want to have a local coordinate systmem at each node and each z axis of this coordinate system to point perpendicularly on the surface of its location.
Thank you for the time that you are devoting!