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Meshing Error

Posted Nov 3, 2023, 2:21 p.m. EDT Wave Optics, Mesh Version 6.0 8 Replies

Collins Kariuki Computational Physics (Sustainability)
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For the glass substrate model geometry (attached below), I am trying to create a mesh. However, I am encountering this error:

""The current physics settings induce a mesh requirement of about 1.1e+07 elements.

Trying to fulfill this requirement may cause out of memory errors or process locking. Switching to user-controlled mesh.

Please review mesh settings carefully before building the user-controlled mesh, or switch back to physics-controlled mesh and change physics settings.""

Please help me on how I can rectify my physics settings. In my mind, my model is not that complicated, indeed, it's just a slab of Silica glass so I don't understand why the number of elements is that many.

8 Replies Last Post Dec 7, 2023, 2:49 p.m. EST
Jeff Hiller COMSOL Employee

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Posted: 12 months ago Nov 3, 2023, 2:23 p.m. EDT
Updated: 12 months ago Nov 3, 2023, 2:21 p.m. EDT

You didn't attach the file.

Jeff

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Jeff Hiller
You didn't attach the file. Jeff
Collins Kariuki Computational Physics (Sustainability)
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Posted: 12 months ago Nov 3, 2023, 2:24 p.m. EDT
Updated: 12 months ago Nov 3, 2023, 2:21 p.m. EDT

Here is my mph file.

Here is my mph file.
Collins Kariuki Computational Physics (Sustainability)
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Posted: 12 months ago Nov 3, 2023, 2:25 p.m. EDT
Updated: 12 months ago Nov 3, 2023, 2:23 p.m. EDT

You didn't attach the file.

Jeff

Attached. Sorry for the delay.

>You didn't attach the file. > >Jeff Attached. Sorry for the delay.
Robert Koslover Certified Consultant
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Posted: 12 months ago Nov 3, 2023, 7:01 p.m. EDT
Updated: 12 months ago Nov 3, 2023, 7:01 p.m. EDT

There is still no attached file.

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Scientific Applications & Research Associates (SARA) Inc.
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There is still no attached file.
Dave Greve
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Posted: 12 months ago Nov 3, 2023, 7:43 p.m. EDT
Updated: 12 months ago Nov 3, 2023, 7:42 p.m. EDT

For plate-like structures, often a swept mesh is a good idea.

For plate-like structures, often a swept mesh is a good idea.
Collins Kariuki Computational Physics (Sustainability)
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Posted: 12 months ago Nov 13, 2023, 3:17 p.m. EST
Updated: 12 months ago Nov 13, 2023, 3:16 p.m. EST

Is the .mph attached now? I am really sorry for this delay. I am new to this.

Is the .mph attached now? I am really sorry for this delay. I am new to this.
Robert Koslover Certified Consultant
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Posted: 12 months ago Nov 13, 2023, 4:19 p.m. EST
Updated: 12 months ago Nov 13, 2023, 4:19 p.m. EST

I don't have the ewfd module, but I can see why you get that error if the software tries to generate a physics-controlled mesh. You are trying to model infrared light (1 micron wavelength) in a computational volume that is a one meter in radius and 5 mm thick. You either need to: (1) model something with a much smaller volume or (2) change your computational method to something that doesn't require resolution on the wavelength scale. Good luck.

-------------------
Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
I don't have the ewfd module, but I can see why you get that error if the software tries to generate a physics-controlled mesh. You are trying to model infrared light (1 micron wavelength) in a computational volume that is a one meter in radius and 5 mm thick. You either need to: (1) model something with a much smaller volume or (2) change your computational method to something *that doesn't require resolution on the wavelength scale*. Good luck.
Collins Kariuki Computational Physics (Sustainability)
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Posted: 11 months ago Dec 7, 2023, 2:49 p.m. EST
Updated: 11 months ago Dec 7, 2023, 2:38 p.m. EST

Hello Dr. Koslover. Your advice, specifically (2), worked. Thank you very much.

Hello Dr. Koslover. Your advice, specifically (2), worked. Thank you very much.

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