Setting Up the Outputs for the Study

In Design Manager, responses represent the outputs of your study. In the reference simulation, you monitor the quantities of interest using reports. In Design Manager, you monitor the response of these reports to different designs, using responses.

You can use responses to define study objectives and to set constraints in the optimization study. In this tutorial, you set the pressure drop and mixture homogeneity as competing goals, where the goal for each is to minimize the values. The mixture homogeneity is also added as a constraint, where values above 0.15 are not considered valid.

Scenes and plot data are in a study are also considered as outputs. In this tutorial, you want Design Manager to save the scenes that show the mass fraction of each mixture inside the pipe, as well as the mass fraction at the outlet. In addition to the scenes, you want Design Manager to save the plots containing the residuals and the pressure drop, which are useful to assess solution convergence.

  1. Define the responses for the study:
    1. Select the Design Studies > Optimization > Responses node and click the property customizer () for Responses.
    2. In the Responses - Responses dialog, select Outlet_N2_SurfaceStandardDeviation and PressureDrop, and click OK.
      The corresponding reports from the reference simulation are added as responses to the study.
    3. Expand the Responses node.
    4. Edit the PressureDrop node and set the following properties:
      Parameter Setting
      Is Objective Activated
      Objective Properties
      Goal Minimum (default)
      Normalization Type Baseline Normalization (default)
    5. Click Close.
    6. Edit the Outlet_N2_SurfaceStandardDeviation node and set the following properties:
      Parameter Setting
      Is Objective Activated
      Is Constraint Activated
      Objective Properties
      Goal Minimum (default)
      Normalization Type Baseline Normalization (default)
      Weight 5.0
      Constraint Properties
      Type Maximum
      Maximum Constraint > Maximum 0.15
      In optimization studies with multiple objectives, Design Manager prioritizes objectives based on the specified Weight. In this study, the weight assigned to reducing the Nitrogen standard deviation (making the mixture more homogeneous) is 5 times the weight assigned to the reducing the pressure drop objective. As a result, Design Manager prioritizes on making the mixture more homogeneous while optimizing the design of the static mixer.
      The Maximum Constraint property tells Design Manager that designs that return values of Outlet_N2_SurfaceStandardDeviation above 0.15 are not valid.
    7. Click Close.
      The Objective Properties and Constraint Properties nodes are added to the Outlet_N2_SurfaceStandardDeviation node. These nodes control the specific objective and constraint properties for the Outlet_N2_SurfaceStandardDeviation response.
  2. Select the data that you want to post-process:
    1. Select the Design Studies > Optimization > Scenes node and click the property customizer () for Scenes.
    2. In the Scenes dialog, select the following scenes and click OK:
      Scene Description
      O2_MassFraction Displays the mass fraction of Oxygen in the pipe. The isosurface in the scene is colored to show the pressure values in the pipe. The fins in the pipe are also displayed.
      N2_MassFraction Displays the mass fraction of Nitrogen in the pipe.
      Outlet_N2_MassFraction Displays the mass fraction of Nitrogen at the outlet.
      The selected scenes from the reference simulation are added as scenes to the study.
    3. Select the Design Studies > Optimization > Plots node and click the property customizer () for Plots.
    4. Select the PressureDrop Monitor Plot and Residuals plots.
    The inputs and outputs for the optimization study are shown below:

  3. Save the Design Manager project.