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Performing a thermal correlation analysis on a steady state problem
In this tutorial, you will learn how to set up and solve a thermal correlation analysis, analyze the results, and update the model with the optimized results for a steady-state problem.
8. Define the optimization design variables.
You will specify the minimum, and maximum values of the four design variables you previously created to limit their variation during the optimization process.

Tutorials
- TMG Correlation tutorials
  These examples are designed to help you become familiar with some of the major features available in TMG Correlation.
- Performing a thermal correlation analysis on a steady state problem
  In this tutorial, you will learn how to set up and solve a thermal correlation analysis, analyze the results, and update the model with the optimized results for a steady-state problem.
  - 1. Open the Simulation file.
    In addition to opening the file used for this tutorial, you will reset the dialog boxes to ensure that they are in the expected initial state.
  - 2. Examine the model.
    You will explore the boundary conditions in the model to learn more about how the model is constructed.
  - 3. Create a thermal correlation analysis.
    You will create a thermal correlation analysis using TMG Correlation.
  - 4. Define the sensors.
    You will create four sensors by importing reference data from a CSV file.
  - 5. Pair the sensors with the simulation model.
    You will pair the sensors with the elements of the simulation model using the proximity method.
  - 6. Create the design variables.
    You will use the multiplier and substitution methods to create design variables from the boundary condition parameters that are present in the correlated solution.
  - 7. Set up the targets.
    You will set the weight factor of the bus targets for the optimization process.
  - 8. Define the optimization design variables.
    You will specify the minimum, and maximum values of the four design variables you previously created to limit their variation during the optimization process.
  - 9. Set up the solver settings.
    You will define the TMG Correlation solver parameters for the optimization.
  - 10. Solve the thermal correlation analysis.
    You will launch the optimization of the active thermal correlation analysis.
  - 11. Plot the thermal correlation graph during the optimization process.
    The Solution Monitor dialog box is still open from the previous step. During the solve, you will plot the evolution of the objective function and the evolution of the design variables gradient.
  - 12. Analyze the optimized solution results.
    You will load and analyze the optimized solution results after solving a thermal correlation analysis. You will compare the reference and optimized temperature values of the targets after solving the thermal correlation analysis.
  - 13. Update the simulation model.
    You will update and save the new simulation model that contains the optimized design variable values applied to the related parameters.
- Performing a thermal correlation analysis on a transient problem
  In this tutorial, you will learn how to set up and solve a thermal correlation analysis, analyze the results, and update the model with the optimized results for a transient problem.

8. Define the optimization design variables.

You will specify the minimum, and maximum values of the four design variables you previously created to limit their variation during the optimization process.

In the TMG Correlation dialog box, select the Optimization > Optimization Design Variables node.
In the Optimization Design Variables group, select DV1_CPU_to_PCB_HTC.
Expand the Attributes subgroup and select the Minimum Value check box.
In the Minimum Value box, type 7500 to specify the minimum bounds for the DV1_Heat_Transfer_Coefficient design variable.
Select the Maximum Value check box.
In the Maximum Value box, type 25000 to specify the maximum bounds for the DV1_Heat_Transfer_Coefficient design variable.
Click Apply to Selected Design Variables.
The Optimization Design Variables table is updated with the minimum and the maximum value of the DV1_Heat_Transfer_Coefficient design variable.
In the Optimization Design Variables table, select DV2_Chip1_load, then press and hold Ctrl and select DV3_Chip2_load, and DV4_Chip3_load.
In the Minimum Value box, type 0.1.
In the Maximum Value box, type 5.0.
Click Apply to Selected Design Variables to apply the minimum and maximum value to all selected design variables.
The Optimization Design Variables table is updated with the minimum and the maximum values of the three design variables.