How to calculate the cylindrical velocity components in CFX-Post
CFX-Post includes additional Turbo post-processing capabilities for turbomachinery. However, also for non-turbo applications the turbo menu provides the capability to create a Cylindrical coordinate system about the axis of rotation and generate additional variables about this coordinate. This can be done regardless of whether it is a rotating or a non-rotating application.
To specify the axis of rotation, go to Tools>Modify Rotation Axis. If your model has a rotating frame, the axis definition will be picked up from the res/def file based on your rotating frame. If you wish to modify the axis, or specify one for a non-rotating problem, uncheck Axis Definition from File and specify either a Principal Axis, or two points to define the axis. Specifying the axis will instantly add a Turbo section to your variables which includes three scalar fields:
And three vector fields:
In addition, you can calculate velocity components from Tools>Calculate Velocity Components. This will add three scalar fields:
And one vector field:
The meridional velocity includes the axial and radial components of velocity, but excludes the circumferential component.
This information is also to be found on the CFX Community Site:
<a target=_blank href="http://www-waterloo.ansys.com/cfxcommunity/">http://www-waterloo.ansys.com/cfxcommunity/</a>http://www-waterloo.ansys.com/cfxcommunity/
CFX-5 Technical Tips --> Calculating Cylindrical Velocity Components