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Extract mesh information in Matlab

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Hello,

I'm new to Comsol. Can anybody explain how to extract surface mesh info from Comsol? I'm using version 3.5.
The following is what I did:
(1) load a 2D curve y=f(x) into Comsol.
(2) Revolve and generate an axi-symmatric 3D object.
(3) Use init mesh to generate mesh. (But not sure it is the volume mesh or surface mesh)
(4) Export mesh to fem structure.

The information I need from the exported fem structure includes:
(1) x,y,z coordinates of nodes on the surface only.
(2) element connection.
(3) edge list.

Now I can see that "fem" is in my matlab workspace. But I don't know how to go further to dig out more. I
thought there should be something called "fem.mesh.p" or "fem.mesh.t". But it seems in my fem structure,
there is only something called "fem.xmesh".

Another problem is I don't know whether the mesh generated in comsol is volume mesh or surface mesh.
I only need surface mesh.

Thanks for your help.


3 Replies Last Post 2012年1月27日 GMT-5 12:17
COMSOL Moderator

Hello Tony Gao

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Posted: 1 decade ago 2012年1月26日 GMT-5 22:05
Hi Tony,

with a simple command like

ComsolMesh = get(mesh1);

mesh data is accessible and you can get vertex points with

vertex = ComsolMesh.Vertex

But there is no clue how these points should be connected together!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

I've done this with comsol 4.2 and matlab 2007.
Hi Tony, with a simple command like ComsolMesh = get(mesh1); mesh data is accessible and you can get vertex points with vertex = ComsolMesh.Vertex But there is no clue how these points should be connected together!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I've done this with comsol 4.2 and matlab 2007.

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Posted: 1 decade ago 2012年1月26日 GMT-5 22:05
Hi Tony,

with a simple command like

ComsolMesh = get(mesh1);

mesh data is accessible and you can get vertex points with

vertex = ComsolMesh.Vertex

But there is no clue how these points should be connected together!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

I've done this with comsol 4.2 and matlab 2007.
Hi Tony, with a simple command like ComsolMesh = get(mesh1); mesh data is accessible and you can get vertex points with vertex = ComsolMesh.Vertex But there is no clue how these points should be connected together!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I've done this with comsol 4.2 and matlab 2007.

Masoud Ghorbani Moghaddam

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Posted: 1 decade ago 2012年1月27日 GMT-5 12:17
Hi,

You can also have access to all mesh information from the GUI. There you can find also the way the elements are attached. You just need to do right-Click on the Mesh (In Gui) and Export it to a file. (It has all the information about your mesh). This is possible in Comsol 4.2. I hope it is also available in 3.5 version for you.

Masoud
Hi, You can also have access to all mesh information from the GUI. There you can find also the way the elements are attached. You just need to do right-Click on the Mesh (In Gui) and Export it to a file. (It has all the information about your mesh). This is possible in Comsol 4.2. I hope it is also available in 3.5 version for you. Masoud

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