KNOWN ISSUE: Pitch angle calculation incorrect when initial mesh spans the theta = pi plane (Class 3 Error)



SYMPTOM:
The CFX-Solver may calculate the pitch angle incorrectly when the initial mesh spans the plane where the theta coordinate is equal to pi (or -pi).

PROBLEM:
The new pitch calculation algorithm does not properly check and correct for this scenario.

WORKAROUND:
The pitch calculation can be reverted to use the old algorithm by setting the expert parameter "ggi dtheta mode = 1".

FIXED IN:
ANSYS CFX Release 12.1. A custom executable for ANSYS CFX Release 12.0 is available on request.





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