Derived quantities in Ansys Polyflow are also known as postprocessors. Postprocessors are sub-tasks that require the results of a previous calculation as their input. For example, the calculation of viscosity based on the known velocity and temperature fields can be performed in a postprocessor.
Important: Do not confuse Ansys Polyflow postprocessors, which compute certain quantities, with graphics programs like Fluent/Post that are used to visualize results.
Postprocessors can be defined in Ansys Polydata when at least one other sub-task has already been defined. You must specify the type of postprocessor you want, as well as any related material properties and boundary conditions. The derived quantities that are available in Ansys Polydata, and the inputs required to define them, are described in the remaining sections of this chapter.