[Gmsh] How to associate line elements on boundaries with inner elements

[Praveen C]

There are efficient algorithms to find such information. See this book

Lohner: Applied CFD Techniques

praveen

On Wed, Nov 30, 2011 at 11:01 PM, Y JIANG <y.jiang at ed.ac.uk> wrote:

> Dear Gmsh gurus,
>
> I just started using Gmsh and found it is really great. But I come
> across a problem when I use it with my own finite element solver. Take
> 2D analysis for instance, the solver needs to know which element and
> which face of it in order to assign proper boundary conditions. This is
> quite different from Gmsh's standard output, where elements on boundary
> are represented as line elements and have no explicit relation with the
> inner elements they belong to.
>
> I thought about an awkward way to associate the line elements and inner
> elements by comparing the nodes on boundaries. But this seems very
> inefficient. A better way would be adding corresponding inner element
> tags and the face tags to the line elements. Is it possible to do it in
> Gmsh, or are there other better methods in doing so?
>
> Thank you for all your suggestions.
>
> Y Jiang
>
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