Coupling vector fields from 2D axisymmetric models to 3D models

Hello everyone!

I want to do a simple transformation of a vector field between 2D axisymmetric and 3D models.

I determine the vector field first by means of a 2D axisymmetric model in the complete computational domain. Secondly I want to use a part of this vector field in a specific domain in a 3D model. In consequence I need to rotate and transform the calculated field from (r,phi,z) to (x,y,z) in this domain.

I would be very thankfull if anyone has an idea how to do this in COMSOL.

Best regards!

Konstantin