I-deas Master Series always saves the coordinates of the FEM mesh to the universal file in SI units. You should keep this in mind when setting up, solving, and postprocessing your model, to prevent unexpected conversions and incorrect results.

If, for example, the geometry for the problem you want to solve in Ansys Polyflow is 10 cm long, you should specify a length of 10 m for your mesh in I-deas. When you convert the mesh in Ansys Polydata, it will become a dimensionless length of 10.

As described in Unit Systems, you can consider this to be the length unit of your choice, as long as you are consistent. Similarly, if the width of the 10-cm-long mesh is 55 mm, think of this as 5.5 cm and specify a width of 5.5 m in I-deas.

If you find that your mesh has incorrect dimensions, you can use Ansys Polyfuse to scale it. See Translating, Rotating, and Scaling a Mesh for details.