Symmetric Boundary Condition

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Hello everybody, Have a nice day.

I am working with model having symmetric geometry. So, I want to utilize the symmetry node in simulation. However, when I receive the results, I think there is no symmetry in my model !

Please let's me know the reason and where I did wrong step.

Thank you very much !



9 Replies Last Post 17.12.2024, 03:56 GMT-5
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Posted: 3 weeks ago 05.12.2024, 04:41 GMT-5
Updated: 3 weeks ago 05.12.2024, 09:48 GMT-5

You do have symmetry. The symmetry is at the two boundaries you have selected.

-------------------
René Christensen, PhD
Acculution ApS
www.acculution.com
info@acculution.com
You do have symmetry. The symmetry is at the two boundaries you have selected.

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Posted: 3 weeks ago 05.12.2024, 20:46 GMT-5

You do have symmetry. The symmetry is at the two boundaries you have selected.

I have selected the symmetry for two boundaries, but the results show that these boundaries seem not to be symmetric. This is my feeling, is it correct ?

>You do have symmetry. The symmetry is at the two boundaries you have selected. I have selected the symmetry for two boundaries, but the results show that these boundaries seem not to be symmetric. This is my feeling, is it correct ?

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Posted: 3 weeks ago 06.12.2024, 02:35 GMT-5

Don't you have symmetry right at those boundaries, as indicated in my png?

-------------------
René Christensen, PhD
Acculution ApS
www.acculution.com
info@acculution.com
Don't you have symmetry right at those boundaries, as indicated in my png?


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Posted: 2 weeks ago 09.12.2024, 03:19 GMT-5

I have symmetry in these boundaries.

I have symmetry in these boundaries.

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Posted: 2 weeks ago 09.12.2024, 05:48 GMT-5

And that is all that this symmetry condition gives; symmetry at those specific boundaries.

-------------------
René Christensen, PhD
Acculution ApS
www.acculution.com
info@acculution.com
And that is all that this symmetry condition gives; symmetry at those specific boundaries.

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Posted: 2 weeks ago 09.12.2024, 07:16 GMT-5

And that is all that this symmetry condition gives; symmetry at those specific boundaries.

Thank you, now I understand.

>And that is all that this symmetry condition gives; symmetry at those specific boundaries. Thank you, now I understand.

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Posted: 2 weeks ago 10.12.2024, 01:19 GMT-5

Great! Remember that physics and study matter when it comes to symmetry, such that acoustics is different than solid mechanics, when comparing the geometrical symmetry with the physics symmetry, and a driven response might require different thoughts about symmetry than an eigenmode analysis. COMSOL has blog post about this (https://www.comsol.com/support/learning-center/article/Using-Symmetry-to-Reduce-Model-Size-35921) and I have written about it too (https://audioxpress.com/article/simulation-techniques-dimensional-reduction-for-vibroacoustical-simulations)

-------------------
René Christensen, PhD
Acculution ApS
www.acculution.com
info@acculution.com
Great! Remember that physics and study matter when it comes to symmetry, such that acoustics is different than solid mechanics, when comparing the geometrical symmetry with the physics symmetry, and a driven response might require different thoughts about symmetry than an eigenmode analysis. COMSOL has blog post about this (https://www.comsol.com/support/learning-center/article/Using-Symmetry-to-Reduce-Model-Size-35921) and I have written about it too (https://audioxpress.com/article/simulation-techniques-dimensional-reduction-for-vibroacoustical-simulations)

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Posted: 1 week ago 16.12.2024, 19:56 GMT-5

Great! Remember that physics and study matter when it comes to symmetry, such that acoustics is different than solid mechanics, when comparing the geometrical symmetry with the physics symmetry, and a driven response might require different thoughts about symmetry than an eigenmode analysis. COMSOL has blog post about this (https://www.comsol.com/support/learning-center/article/Using-Symmetry-to-Reduce-Model-Size-35921) and I have written about it too (https://audioxpress.com/article/simulation-techniques-dimensional-reduction-for-vibroacoustical-simulations)

Thank you so much for your detailed explanation and comment.

>Great! Remember that physics and study matter when it comes to symmetry, such that acoustics is different than solid mechanics, when comparing the geometrical symmetry with the physics symmetry, and a driven response might require different thoughts about symmetry than an eigenmode analysis. COMSOL has blog post about this (https://www.comsol.com/support/learning-center/article/Using-Symmetry-to-Reduce-Model-Size-35921) and I have written about it too (https://audioxpress.com/article/simulation-techniques-dimensional-reduction-for-vibroacoustical-simulations) Thank you so much for your detailed explanation and comment.

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Posted: 1 week ago 17.12.2024, 03:56 GMT-5

My pleasure.

-------------------
René Christensen, PhD
Acculution ApS
www.acculution.com
info@acculution.com
My pleasure.

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