Each turbo plot appears in the Turbo tree view under Plots, and can be edited.
Double-click 3D View and choose to
view the faces (Show Faces) or the edges of the
mesh elements (Show Mesh Lines) by enabling the
appropriate toggles.
The instancing information has already been entered during the initialization phase. You can opt to show instancing for the plots in each domain by changing the # of Copies. For details, see Instancing Tab.
Span Direction is a unit vector pointing along the direction of span coordinate for each mesh node, based on the background mesh.
Span Normalized defines the dimensionless distance (between 0 and 1) from the hub to the shroud. For example, if the distance between the hub and shroud in a straight duct is 0.1 m, a span of 0.9 would describe a location 0.09 m from the hub and 0.01 m away from the shroud.
Streamwise location is the dimensionless distance from the inlet to the outlet. It ranges from 0 to 1 for the first component, 1 to 2 for the second, and so on. For example, in a single domain case, if the distance between the inlet and the outlet in a straight duct is 1 m, a streamwise location of 0.4 would describe a location 0.4 m from the inlet and 0.6 m away from the outlet. If the same duct were the second component in a multi-component case, the same location would then be expressed as a streamwise location of 1.4.
Theta is the angular coordinate measured about the axis of rotation following the right-hand rule.
The Theta variable is intentionally generated by CFD-Post to have the following two properties:
A minimum Theta value of zero (at the inlet).
Continuously increasing values of Theta independent of the total blade wrap. This is particularly useful for high-wrap blades.
Because of these properties, the Theta variable generated in CFD-Post is most likely different than that of a user-defined expression based on the Cartesian coordinates.
After turbo initialization, the Theta range starts at a small
but non-zero value. To set the Theta range to exactly zero, use the
command >turbo update_theta.
The position of zero Theta (Theta = 0°) relative to the global coordinate system depends on the loaded case. For geometries that define a partial machine (not full 360°), zero Theta is at the geometry point with the lowest angle following the right-hand rule. For full 360° geometries, zero Theta is generally at an arbitrary position. You can specify zero Theta via an environment variable. For details, see Setting CFD-Post Operation Through Environment Variables.