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Export Individual Sub-Domain Mesh to MATLAB

Posted 13.05.2011, 14:28 GMT-4 Interfacing, Mesh Version 3.5a, Version 4.1 3 Replies

Sanket Jain
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Hello Experts,

I have access to multiple versions of Comsol, 3.5a and 4.0. Currently, my model is in the 3.5a version.

In 3.5a, I can use the xmeshinfo command or fem.mesh.p and fem.mesh.t to export the mesh co-ordinates and connections of the complete model to MATLAB workspace.

Is there any way, I can export the same information individually for each subdomain in my model?

Sanket
3 Replies Last Post 07.10.2011, 07:34 GMT-4
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Hello Sanket Jain

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

Prisca Marianelli
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Posted: 1 decade ago 05.10.2011, 07:47 GMT-4
Hi everybody,
I've got a similar problem: I want to export the single domain meshes (via the Matlab livelink, where I will have to refer to the mesh node tags).
To do this, I've to define multiple mesh nodes under the mesh branch. But it seems that the single mesh nodes are somehow independent one from each other.
For example, I have 2 blocks and I mesh the first one with a mesh node. Then, I add a second mesh node and I select 'Remaining'. At this very point, the second block is meshed but the first block is meshed again, as if the first mesh node didn't exist.
Therefore, my question is:
- how I can I make the mesh nodes behave in a complementar way? I need different mesh nodes because each of them has a different tag which I can refer to in Matlab.
Thank you in advance for any help.
Regards,
PM
Hi everybody, I've got a similar problem: I want to export the single domain meshes (via the Matlab livelink, where I will have to refer to the mesh node tags). To do this, I've to define multiple mesh nodes under the mesh branch. But it seems that the single mesh nodes are somehow independent one from each other. For example, I have 2 blocks and I mesh the first one with a mesh node. Then, I add a second mesh node and I select 'Remaining'. At this very point, the second block is meshed but the first block is meshed again, as if the first mesh node didn't exist. Therefore, my question is: - how I can I make the mesh nodes behave in a complementar way? I need different mesh nodes because each of them has a different tag which I can refer to in Matlab. Thank you in advance for any help. Regards, PM

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Sanket Jain
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Posted: 1 decade ago 05.10.2011, 10:44 GMT-4
Sorry! I can't be of much help. I used xmeshinfo in 3.5a to take out the co-ordinates and connections of the mesh. Generally, the 5th column of the connection indicated the domain to which each element belong to. I think I used that to find the domain number.

Generally in 4.1, all previous function of 3.5a are preceded by 'mph'. But I haven't tested for it yet!
Sorry! I can't be of much help. I used xmeshinfo in 3.5a to take out the co-ordinates and connections of the mesh. Generally, the 5th column of the connection indicated the domain to which each element belong to. I think I used that to find the domain number. Generally in 4.1, all previous function of 3.5a are preceded by 'mph'. But I haven't tested for it yet!
Lars Gregersen COMSOL Employee

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Posted: 1 decade ago 07.10.2011, 07:34 GMT-4
Hi

In Comsol 4.2 you'll find the function mphmeshstats that will return the information you need for the meshes.

Comsol 4.2 also added a new function mphxmeshinfo that makes access to the xmeshinfo easier. However, for the xmeshinfo there is no easy way to obtain the information from independent domains separately. Write to support if you need help with this.


Lars Gregersen
Comsol Denmark
Hi In Comsol 4.2 you'll find the function mphmeshstats that will return the information you need for the meshes. Comsol 4.2 also added a new function mphxmeshinfo that makes access to the xmeshinfo easier. However, for the xmeshinfo there is no easy way to obtain the information from independent domains separately. Write to support if you need help with this. Lars Gregersen Comsol Denmark

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