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Meshing
Posted 21 juil. 2017, 17:54 UTC−4 3 Replies
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Hi all,
I'm working on a design and have imported a model in COMSOL.
When I'm going for meshing in normal/fine it gives an error as:
Failed to generate mesh for domain.
- Domain: 2
Failed to insert point.
- x-coordinate: 310.071
- y-coordinate: 154.598
- z-coordinate: 5.3
An empty cavity was generated.
Kindly suggest some measures to have successful meshing of this structure.
--
Mayank
--
Mack
I'm working on a design and have imported a model in COMSOL.
When I'm going for meshing in normal/fine it gives an error as:
Failed to generate mesh for domain.
- Domain: 2
Failed to insert point.
- x-coordinate: 310.071
- y-coordinate: 154.598
- z-coordinate: 5.3
An empty cavity was generated.
Kindly suggest some measures to have successful meshing of this structure.
--
Mayank
--
Mack
Attachments:
3 Replies Last Post 24 juil. 2017, 11:45 UTC−4
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Posted:
8 years ago
Hi
You seem to have a thin layer device there, perhaps a MEMS device, or just something "thin" compared to its horizontal extend.
These are objects known hard to mesh.
To get a better control and observation of the selections and probably splitting's you need to perform, I suggest to you to add a new View (right click the "Definitions" node and just select the View), and for this one select the "automatic" scaling a couple of sub-nodes below the new View node in the model tree.
Then for learning how to mesh such structures, check the how to videos of the main COMSOL site i.e. the series including mesh tutorials, and do not forget the BLOG posts on their webseite
--
Good luck
Ivar
You seem to have a thin layer device there, perhaps a MEMS device, or just something "thin" compared to its horizontal extend.
These are objects known hard to mesh.
To get a better control and observation of the selections and probably splitting's you need to perform, I suggest to you to add a new View (right click the "Definitions" node and just select the View), and for this one select the "automatic" scaling a couple of sub-nodes below the new View node in the model tree.
Then for learning how to mesh such structures, check the how to videos of the main COMSOL site i.e. the series including mesh tutorials, and do not forget the BLOG posts on their webseite
--
Good luck
Ivar
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Posted:
8 years ago
Updated:
8 years ago
Hello Mack,
Very thin (and very elongated) structures like this one lend themselves very well to swept meshing. See Reference Manual for COMSOL Multiphysics, version 5.3, Chapter 8, and in particular the swept mesh tutorial that starts on page 593. This blog is also right on topic: www.comsol.com/blogs/improving-your-meshing-with-swept-meshes/ .
In case some parts of a structure lends itself to swept meshing while some others don't, you can partition the geometry before meshing and use different meshing strategies in the different chunks thus created. See e.g. www.comsol.com/blogs/improving-your-meshing-with-partitioning/ .
Best,
Jeff
Very thin (and very elongated) structures like this one lend themselves very well to swept meshing. See Reference Manual for COMSOL Multiphysics, version 5.3, Chapter 8, and in particular the swept mesh tutorial that starts on page 593. This blog is also right on topic: www.comsol.com/blogs/improving-your-meshing-with-swept-meshes/ .
In case some parts of a structure lends itself to swept meshing while some others don't, you can partition the geometry before meshing and use different meshing strategies in the different chunks thus created. See e.g. www.comsol.com/blogs/improving-your-meshing-with-partitioning/ .
Best,
Jeff
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Posted:
8 years ago
Yes, that`s a MEMS structure. Domain 2 has thickness of 0.2 microns....
Will go through your suggested technique and tutorial...
Many thanks
--
Mack
Will go through your suggested technique and tutorial...
Many thanks
--
Mack