### 7.2.1. Notes and Limitations of Profile Data Expansion

The Expand Profile Data option in CFX-Pre has the following limitations:

- If a non-integer number of replications is needed to obtain a 360° profile, then the data for the last replicated portion is truncated and a gap is left. The gap is positioned to be as far away from the original profile as possible.

- Only files that have spatial data consisting of three spatial Cartesian coordinates (X, Y, Z) are supported.

- Variables in the profile file that are identified as vector components in cylindrical coordinates will be transformed so that their axial, circumferential, and radial components remain constant in each replication. It is assumed that vector variables in cylindrical coordinates (such as Velocity Axial, Velocity Radial, and Velocity Circumferential) are relative to the same axis of rotation as used for the profile expansion.

- Variables are identified as components of Cartesian vectors if they are standard CFX Cartesian vector components or if they have named with a X, Y, or Z suffix (upper or lower case). If all three components of a vector are present, then the three components are treated as components of a Cartesian vector, and the vector is rotated appropriately when the profile is replicated. If not all three components of the vector are present, then the components are ignored and will not appear in the expanded profile file. It is assumed that all three components of a vector have consistent units.

- Variables that are standard CFX tensor components (for example, components of Reynolds Stress) will be ignored and will not appear in the expanded profile file.

- Variables from the profile file that are not identified as vector and tensor components will be assumed to be scalar variables and will take the same value in each replication, leading to a rotationally-periodic variable definition in the expanded profile.

- It is advisable to check an expanded profile file by initializing it and then coloring the resulting User Function, to ensure that vector variables have been transformed as intended.

- A new variable Sector Tag is written to the expanded profile file, only if an integer number of replications is needed to obtain a 360° profile. This identifies each replication by a unique integer.

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