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Mapped Mesh (square cells) for a Comoposite Geomety

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Hi;
I am trying to make a mapped mesh for a composite geometry, the geometry is as follows, a square and an ellipse with an angle of -45 degrees at the center of the square. I want all the mesh cells to be squares in the square and in the ellipse.
I am getting error 4012:Domain must be bounded by one connected edge component only.
I was thinking of finding some kind of mathematical relationship to characterize the ellipse inside the square as a contrast in electrical conductivity from scalar expressions.
Any one could help on this?
Regards;
Ubi


2 Replies Last Post 28 nov 2010, 10:45 GMT-5
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Posted: 1 decade ago 28 nov 2010, 00:56 GMT-5
Hi,

I also encountered the same mesh error. Have you figured out the problem? Why such an error is produced?
Hi, I also encountered the same mesh error. Have you figured out the problem? Why such an error is produced?

Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

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Posted: 1 decade ago 28 nov 2010, 10:45 GMT-5
Hi

Well I suppose its because it's not obvious to achieve the "quadrature du cercle"

The quad mesh generator have some limitations on the topology of the domains.

Why not use triangles ? with the high order shape functions (second order by default) COMSOL goes far with "tri/thets"s, also where other older FEM used far higher "order elements"

--
Good luck
Ivar
Hi Well I suppose its because it's not obvious to achieve the "quadrature du cercle" The quad mesh generator have some limitations on the topology of the domains. Why not use triangles ? with the high order shape functions (second order by default) COMSOL goes far with "tri/thets"s, also where other older FEM used far higher "order elements" -- Good luck Ivar

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