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how can I find the mid-nodes
Posted 2009年10月6日 GMT+2 00:30MeshVersion 4.21 Reply
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Hi,
I am using Taylor-hood ( second-order Lagrange) FEM to solve some PDEs, thus I need to number the nodes including the mid-point at each edge of the triangular element. The fem.mesh.t and fem.mesh.p only offer the positions and informations of the vertices, not including the mid-nodes.
How can I determine the positions of the mid-nodes and give them an order, like fem.mesh.t and fem.mesh.p.
Any help would be appreciated.
I am using Taylor-hood ( second-order Lagrange) FEM to solve some PDEs, thus I need to number the nodes including the mid-point at each edge of the triangular element. The fem.mesh.t and fem.mesh.p only offer the positions and informations of the vertices, not including the mid-nodes.
How can I determine the positions of the mid-nodes and give them an order, like fem.mesh.t and fem.mesh.p.
Any help would be appreciated.
1 Reply
Last Post 2009年10月6日 GMT+2 01:42
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Posted:
1 decade ago
Hi,
I think you should use the "xmeshinfo" from matlab script. For example, assuming fem is your fem structure, then:
fem.xmesh=meshextend(fem); %-create extended mesh
meshxinfo=xmeshinfo(fem,'out','nodes'); %-structured array
allnodes=meshxinfo.coords; %-return the complete list (coordinate) of all nodes into your model
I hope this may be useful
Regards
Pasquale
I think you should use the "xmeshinfo" from matlab script. For example, assuming fem is your fem structure, then:
fem.xmesh=meshextend(fem); %-create extended mesh
meshxinfo=xmeshinfo(fem,'out','nodes'); %-structured array
allnodes=meshxinfo.coords; %-return the complete list (coordinate) of all nodes into your model
I hope this may be useful
Regards
Pasquale