[Gmsh] Overlapping nodes.

[Mikhail Artemyev]

Hi Arijit Khan,

You have duplicated mesh nodes, because your surfaces are not 
conforming, i.e. their boundaries are different but overlapping lines 
(look at the attached picture: the lines 4 and 13 (black numbers) 
overlap each other, but they are different lines, therefore the mesh 
nodes on them will be different). The solutions are:
1. Get rid of overlapping lines in your .geo file. For example, you can 
include the node 4 (red number) of the line 13 in the line 4 (so that 
the line 4 will consist of two lines).
2. Read the mesh nodes in your code and get rid of duplicated ones, 
while renumerating them with the existing numbers.
3. Maybe there is a Gmsh plugin performing the second approach. But I'm 
not sure.

Best,
Mikhail


> Hi All,
> Greetings of the season.
> Firstly, I thank you for this wonderful tool. I am a newbie in using GMSH.
> I have created the attached .geo file using Gmsh GUI and meshed it using
> Mesh 2D command in the GUI. But it turns out that some of the nodes have
> two node number as per the attached .jpeg, this is unacceptable in my FEM
> code (this causes a disparity in element connectivity). How do I go about
> so that I have one and unique node numbers for each node.
>
> Thanks & Regards
>
> -- Arijit Khan

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