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Basic question about domains/subdomains
Posted 2011年2月21日 GMT+1 11:15Interfacing, Geometry, MeshVersion 3.5a, Version 4.0a0 Replies
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Hi, i'm having a hard time understanding the domain concept in Comsol. I use matlab to create a block3 geometry object and set up a mesh via meshinit:
fem.geom = block3(1,1,1,'base','corner','pos',[0 0 0]);
fem.mesh = meshinit(fem, 'hauto',9);
then i obtain the elements of that mesh:
meshelements = get(fem.mesh,'el');
then take a look at the elements and the domains:
meshelements{1}.dom
meshelements{2}.dom
meshelements{3}.dom
meshelements{4}.dom
What i see is that the vertices belong to domain numbers from 1 to 8, the edges from 1 to 12, the triangles from 1 to 6 and the tetraeders are only located in domain 1.
I guess triangles are always located on one of the 6 surfaces of the block3 but the rest of the numbering is confusing me, so how does this domain numbering work?
What would happen if i add another block3 object? Is it possible to distinguish eg between triangles located in block3 A or block3 B using the domain(subdomain?) number?
Thank you in advance
fem.geom = block3(1,1,1,'base','corner','pos',[0 0 0]);
fem.mesh = meshinit(fem, 'hauto',9);
then i obtain the elements of that mesh:
meshelements = get(fem.mesh,'el');
then take a look at the elements and the domains:
meshelements{1}.dom
meshelements{2}.dom
meshelements{3}.dom
meshelements{4}.dom
What i see is that the vertices belong to domain numbers from 1 to 8, the edges from 1 to 12, the triangles from 1 to 6 and the tetraeders are only located in domain 1.
I guess triangles are always located on one of the 6 surfaces of the block3 but the rest of the numbering is confusing me, so how does this domain numbering work?
What would happen if i add another block3 object? Is it possible to distinguish eg between triangles located in block3 A or block3 B using the domain(subdomain?) number?
Thank you in advance
0 Replies
Last Post 2011年2月21日 GMT+1 11:15
Hello Chris Shor
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