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Dirichlet Boundry layer
Posted 5 giu 2012, 11:13 GMT-4 3 Replies
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I am trying to build a 2D model that simulate the distribution of electric field.So i am solving the LaplaceEquation with Dirichlet Boundary conditions.My problem that whenever i am trying to select the boundaries of my geometrical shape , it indicates that the boundaries are not applicable. So i would really appreciate if you can help me
Thanks in advance
Thanks in advance
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3 Replies Last Post 6 giu 2012, 00:56 GMT-4
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Posted:
1 decade ago
Hi
your geoemtry is a set of lines butare not closed to form a "solid geometric object", try a Convert to solid and select all and you will get a surface, this defines your 2D "domain" with corresponding "boundaries"
--
Good luck
Ivar
your geoemtry is a set of lines butare not closed to form a "solid geometric object", try a Convert to solid and select all and you will get a surface, this defines your 2D "domain" with corresponding "boundaries"
--
Good luck
Ivar
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Posted:
1 decade ago
Thanks for your Reply
what i am trying to do exactly is to represent a symmetry of sphere for my domain.So my domain is air surrounded by boundary conditions which is steal in my case .So i do not understand you saying that i need to convert my geometry to solid object.So my voltage values across the boundary is zero except at point which represent a small semic-circle within my domain where my voltage value is 9000 Voltage.
Thanks
what i am trying to do exactly is to represent a symmetry of sphere for my domain.So my domain is air surrounded by boundary conditions which is steal in my case .So i do not understand you saying that i need to convert my geometry to solid object.So my voltage values across the boundary is zero except at point which represent a small semic-circle within my domain where my voltage value is 9000 Voltage.
Thanks
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Posted:
1 decade ago
Hi
its part of the Geometry principles of COMSOL. for a 2D problem you need a closed defined 2D surface, you have only the lines around, so you need to groupe these into a surface, this is called "CONVERT TO SOLID" even if you are in 2D.
The naming convention is that in 3D a domain is a volume and a boundary is a surface, while in 2D a domain is a surface and a boundary is a line (check your doc, it's essential that you master well these conventions, it will save you days of misunderstanding and frustrating work
--
Good luck
Ivar
its part of the Geometry principles of COMSOL. for a 2D problem you need a closed defined 2D surface, you have only the lines around, so you need to groupe these into a surface, this is called "CONVERT TO SOLID" even if you are in 2D.
The naming convention is that in 3D a domain is a volume and a boundary is a surface, while in 2D a domain is a surface and a boundary is a line (check your doc, it's essential that you master well these conventions, it will save you days of misunderstanding and frustrating work
--
Good luck
Ivar