Class 3 Error
SYMPTOM:
When an epsilon-based Reynolds stress turbulence model is used for modelling certain flows, such as that past a blunt body, it is occasionally possible for the turbulence to disappear entirely, and for the CFX Solver to predict an unphysical laminar solution. This will often be noticeable.
PROBLEM:
This is due to the parameter ustar, in the turbulent wall function, vanishing when the turbulent kinetic energy i
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WORKAROUND: No workaround is currently available. FIXED IN: ANSYS CFX Release 12.0. The fix is achieved by a combination of documentation and the inclusion of a new expert parameter, which modifes the turbulentb wall treatment. |
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