[Gmsh] Exporting only physical mesh

[Ganesh Diwan]

>
> So you got for one spot more than one node?-


No - I did not check if at one physical location if I have more than one
node. Sorry but I am not sure what you mean by detection method.


> -which was the export format?
>
I am exporting it in standard Gmsh .msh format.

you say you want the true mesh, the physical mesh. So "physical" means that
> it mixture of body, boundary and pure mesh information.
>

When I created a mesh, without doing Geometry -> Physical Groups
->Add->Surface, I only had a 'Elementry entity' of the surface. So, when I
exported the mesh, I could see that there are nodes which are in $Nodes
section but are not part of the finite element connectivity in $Elements
section. In fact these extra nodes were created at the exact physical
locations where I had specified the points to define a B-spline bounding
line. Nothing wrong with this except I do not need these nodes for my FE
program. Specifying a physical group as above however enables the export of
only those nodes that "belong" to the physical surface - exactly what I
need.

Hope this helps

Ganesh



On Sat, Dec 19, 2015 at 10:29 PM, T. Feldhaus <ananim343297 at yandex.com>
wrote:

>
>
> 15.12.2015, 23:14, "Ganesh Diwan" <gcdiwan at gmail.com>:
>
> Dear GMsh
>
> I create a 2D mesh from a surface with a B-spline as its bounding line.
> However, when its mesh is exported, all the points originally used to
> create the B-spline also get exported as nodes of the mesh. Is there a way
> to export only the true mesh i.e. nodes and elements that belong to the
> physical surface alone and not B-spline.
>
> Thanks in advance for help
> Ganesh
> ,
>
> Hi,
> -would like to understand, what you are saying: So you got for one spot
> more than one node?-
> -which is the detection method and
> -which was the export format?
> -you say you want the true mesh, the physical mesh. So "physical" means
> that it mixture of body, boundary and pure mesh information. But you find
> something over more inside, topological points from the original geometry
> as doubles?
> tia
>
>
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