KNOWN ISSUE: nint and int CEL functions only work correctly for dimensionless arguments (Class 3 Error)
If the int and nint functions are used for dimensional arguments, then incorrect answers may be obtained. These errors may be large and noticeable, but may just as easily be small and not noticeable.
This is because the int and nint evaluations are done in the base units, and not the units actually specified.
No workaround is currently available.
ANSYS CFX Release 12.1, by adding a warning message in CFX-Pre and the CFX Documentation.