Simcenter STAR-CCM+ Design Manager : How to create a surrogate model and use it in an optimization study?

2021-06-22T11:52:59.000-0400
Simcenter STAR-CCM+ Simcenter STAR-CCM+ Virtual Reality Teamcenter Share Simcenter STAR-CCM+ Viewer Simcenter STAR-CCM+ Application Specific Solutions

Summary

This article helps explain the steps to create surrogate models and use them in optimization studies instead of using simulation results in the optimization search process. This could be helpful in reducing overall time and be very efficient in searching for optimal designs in some design spaces


Details

This article helps explain the steps to create surrogate models and use them in optimization studies instead of using simulation results in the optimization search process. This could be helpful in reducing overall time in some design spaces


STAGE 1: Creation of Surrogate model


Step1 : From version Simcenter STAR-CCM+ 2021.1, a new node called Surrogates will appear within every Design Study

image.png

Right Click on Surrogates and click "New Surrogate"

image.png

Step 2 -  Choose the response for the surrogate mode


image.png

Here we have chosen Pressure Drop

Step 3: Once a response has been chosen, we can go ahead of compute the surrogate..

image.png

We will end up with a green tick mark like shown below:

image.png


STAGE 2: Using this surrogate in an optimization study:

In this stage we will see how to use the Surrogate model created in previous study in a new optimization study with an objective.

Step 1: Create an optimization study and choose Evaluation Method as "Surrogates" not simulations

image.png

Step 2 : Now include the same input parameters used in the surrogate model created earlier and include the responses of interest

Step 3 :

Click on Response (ex: Pressure drop) and in the properties window, choose the surrogate model as shown below:

image.png
Check the box : "Is Objective"

Step 4 : Now we are ready to run the optimization study, Right Click and click "Run Study"

image.png

Once the optimization is completed, we can see the objective history where the pressure drop vs design iterations can be seen. Note that the design outputs are not from raw simulation files but from the surrogate model created earlier. So we can expect the whole optimization study to complete in seconds.
 

KB Article ID# KB000046432_EN_US

Contents

SummaryDetails

Associated Components

Design Manager Electronics Cooling In-Cylinder (STAR-ICE) Job Manager Simcenter STAR-CCM+