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Electrostatics on a thermally expanded or contracted model

Posted Mar 8, 2019, 5:39 a.m. EST Version 5.4 4 Replies

Pavlos Zairis
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Good mornign everyone,

I am currently investigating the electric field distribution on a cable termination and would like to perform the following analysis:

  • Calculation of electric field at initial state (Electrostatics)
  • Thermal expansion of the model at different temperatures (Heat transfer in solids plus Solid Mechanics physics)
  • Calculation of electric field at expanded state (Electrostatics with initial condition taken from the thermal expansion study)

Currently, I don't think that there is a link between the thermal expansion model and the electrostatics one, so I am wondering if someone has any experience at this kind of modeling.

Thanks in advance for your responses.

Kind regards,

Pavlos.

4 Replies Last Post Mar 18, 2019, 5:33 a.m. EDT
Edgar J. Kaiser Certified Consultant
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Posted: 6 years ago Mar 8, 2019, 9:02 a.m. EST

Hi Pavlos,

I guess the most straightforward solution is to add a moving mesh and control the mesh deformation with the deformation from the thermal-structural physics.

Cheers Edgar

-------------------
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Hi Pavlos, I guess the most straightforward solution is to add a moving mesh and control the mesh deformation with the deformation from the thermal-structural physics. Cheers Edgar
Pavlos Zairis
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Posted: 6 years ago Mar 8, 2019, 9:24 a.m. EST

Hi Edgar,

Thanks for the advice. Actually I found a guide on how to do that and I am following that one at the moment.

Please find a link here: https://www.comsol.de/blogs/how-to-reuse-a-deformed-shape-as-a-geometry-input/

I believe the other option is you said, using ALE with solid mechanics and electrostatics.

Thanks for your time.

Kind regards,

Pavlos.

Hi Edgar, Thanks for the advice. Actually I found a guide on how to do that and I am following that one at the moment. Please find a link here: https://www.comsol.de/blogs/how-to-reuse-a-deformed-shape-as-a-geometry-input/ I believe the other option is you said, using ALE with solid mechanics and electrostatics. Thanks for your time. Kind regards, Pavlos.
Edgar J. Kaiser Certified Consultant
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Posted: 6 years ago Mar 8, 2019, 12:04 p.m. EST

Pavlos,

yes the manual procedure in the blog should work as well. With the ALE you can achieve a fully coupled and dynamic procedure.

Good luck Edgar

-------------------
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Pavlos, yes the manual procedure in the blog should work as well. With the ALE you can achieve a fully coupled and dynamic procedure. Good luck Edgar
Pavlos Zairis
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Posted: 6 years ago Mar 18, 2019, 5:33 a.m. EDT

Hi Edgar,

Thank you very much for the advice.

I will try it both ways to identify the one that suits my case best. (By using the guide, I get some errors that the mesh is problematic in some cases)

Kind regards,

Pavlos.

Hi Edgar, Thank you very much for the advice. I will try it both ways to identify the one that suits my case best. (By using the guide, I get some errors that the mesh is problematic in some cases) Kind regards, Pavlos.

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