KNOWN ISSUE: Problem with energy equation in multiphase, multi-component flow (Class 3 Error)
The predicted temperature field in a multiphase, multi-component flow is incorrect. The errors may be quite large and noticeable, but they are equally likely to be small and not apparent to the user.
This is due to a problem with the drift flux term, modelling species diffusion, in the energy equation having incorrect dependence on the volume fractions of the fluids.
No workaround is currently available.
ANSYS CFX Release 12.1. A custom executable for ANSYS CFX Release 12.0 is available on request.