This section describes the operational changes, the procedural changes (actions that have to be done differently in this release to get an outcome available in Release 2024 R2), and the support changes (functionality that is no longer supported) in Release 2025 R1 of Ansys CFX.
For compressible fluids in rotating domains, the following rothalpy-frame variables are no longer included in the results file by default:
Total Pressure
Total Temperature
Total Density
This change was made in order to prevent numerical problems for high-angular-velocity rotating systems, where rothalpy may exceed the valid range for the material properties.
The variables can be included by selecting them from Extra Output Variables List on the Results tab of the Solver > Output Control details view of CFX-Pre.
Loading a project/state/session file from a previous release can lead to errors being generated if any variables that are no longer included in the output are referenced. It is possible to work around some of these issues by including the variables as mentioned above. In other cases, you might need to reset cells, regenerate reports, and potentially take other actions to eliminate references to variables that are no longer included in the output.