Josh Thomas
Certified Consultant
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Posted:
1 decade ago
2013年1月31日 GMT-5 16:27
Roy-
If you right-click on Geometry and select Conversions>Convert to Surface you can convert solid bodies to surface bodies for use with the Shell Physics Interface.
You can also select the Create Selections box to have all the surfaces saved into a selection that can be accessed by any drop-down boxes for your Boundary Selection in your Physics set-up.
A relatively new feature in COMSOL is the ability to automatically select all boundaries that have a continuous tangent to a selected boundary. This may be helpful to you. You can go under Definitions and add an Explicit selection. Change the geometric entity level to Boundary. Then, check the "Group by continous tangent" check box. Then, which ever boundary you add will automatically have all continuous tangent boundaries added. This may enable you to easily limit your new surface body to only 1/2 of the boundaries without a lot of manually selecting.
Best regards,
Josh Thomas
AltaSim Technologies
Roy-
If you right-click on Geometry and select Conversions>Convert to Surface you can convert solid bodies to surface bodies for use with the Shell Physics Interface.
You can also select the Create Selections box to have all the surfaces saved into a selection that can be accessed by any drop-down boxes for your Boundary Selection in your Physics set-up.
A relatively new feature in COMSOL is the ability to automatically select all boundaries that have a continuous tangent to a selected boundary. This may be helpful to you. You can go under Definitions and add an Explicit selection. Change the geometric entity level to Boundary. Then, check the "Group by continous tangent" check box. Then, which ever boundary you add will automatically have all continuous tangent boundaries added. This may enable you to easily limit your new surface body to only 1/2 of the boundaries without a lot of manually selecting.
Best regards,
Josh Thomas
AltaSim Technologies
Ivar KJELBERG
COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted:
1 decade ago
2013年2月1日 GMT-5 01:00
Hi
remains that certain other programmes have geometrical features that collapses thin walled volumes to the mid surfaces, but you also need to get the boundaries to link again, increasing slightly the length of others. And for 1000 surfaces you need to check and verify all this anyhow
By the way with shell elements you can set an offset I believe. I have mostly given up the shell elements for this reason, but I agree, for complex models they give often better results, but you have quite some manual knitting to do
--
Good luck
Ivar
Hi
remains that certain other programmes have geometrical features that collapses thin walled volumes to the mid surfaces, but you also need to get the boundaries to link again, increasing slightly the length of others. And for 1000 surfaces you need to check and verify all this anyhow
By the way with shell elements you can set an offset I believe. I have mostly given up the shell elements for this reason, but I agree, for complex models they give often better results, but you have quite some manual knitting to do
--
Good luck
Ivar
Jeff Hiller
COMSOL Employee
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Posted:
5 years ago
2020年2月12日 GMT-5 13:37
Updated:
5 years ago
2020年2月12日 GMT-5 13:39
The Design Module, launched a couple of years after this thread started, includes the midsurfacing capability, which does exactly what Roy was looking for, namely replace a thin object with an equivalent surface.
Best,
Jeff
-------------------
Jeff Hiller
The [Design Module](https://www.comsol.com/design-module), launched a couple of years after this thread started, includes the midsurfacing capability, which does exactly what Roy was looking for, namely replace a thin object with an equivalent surface.
Best,
Jeff