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Extract mesh information in Matlab
Posted 19 janv. 2011, 17:34 UTC−5 Mesh Version 4.2 3 Replies
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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.
Hello Tony Gao
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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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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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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