topology optimization with CHBDYE elements

Hi everyone,

I'm trying to set up a model for an optimization problem and in the model I have CHBDYE surface elements for the heat convection. When I try to run the optimization, I get the error message 'CHBDYE surface element can't exist in topology or free-size design domain.' Does it mean that I can't have those elements on my design space or should I define them in another way?

Best Regards

Mert

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Altair Forum User

Hi Mert,

As you can see from the message that topology/free size is not supported when the convective surface is in design space.

Altair Forum User

Hi Mert,

I know that you would have figured out a way to solve that problem. I had the same issue with my optimization. Recently, I got a solution for that problem. I am giving it so that it could be helpful to some one else. Analysis --> Control cards --> Debug. In ARG1 give 'TTPCHBDY' and in ARG2 give '1.0', give '1' for Number_ of_debugs. Click return to save that card. This made my optimization run when the error showed up.

Regards,

Aditya G

FranciscoRamirez

Hello experts!

I just wonder if 8 year later this problem has been solved. Can we use topology optimization with convection?

I am using this tutorial from Simlab: SimLab Tutorials - Coupled Linear Structural Thermal Analysis and I include the basic topology optimization formulation for the structural linear static subcase:

Find \rho
Minimize the compliance of a static subcase
Subject to: volume fraction <= 0.5

However, the same error appears.

Does anyone know how can I solve this problem in Simlab?

I appreciate any help.

Best regards.

Francisco