On 08 Nov 2012, at 19:38, N.O. Jaensson <n.o.jaens...@tue.nl> wrote:

> Dear all,
>  
> I am trying to create a (2D) mesh where very small areas are refined. The 
> refinement is dependent on the solution of a previous simulation and there is 
> no easy way to do the refinements using an Attractor field with lines and/or 
> points. Therefore, I would like to use a background mesh.
>  
> My first question is about how the background is exactly used to determine 
> the element sizes. Is there some sort of ‘sampling mesh’, where the vertices 
> are used to determine the values in the background mesh? If so, what is the 
> resolution of this sampling mesh?
>  


It's up to you: the two "meshes" are independent -- see tutorial/t7.geo (the 
background mesh is specified as a post-processing ".pos" file)

> My second question is related to the first. Because it would be too time 
> consuming to make the whole sampling mesh with the resolution of the small 
> areas, I would like to use an iterative procedure (as suggested in the 
> manual). However, I am having difficulty implementing this iterative process 
> in gmsh. I tried using ‘merge’, but it always seems that the same sampling 
> mesh is used, yielding the same result for every iteration. Can someone point 
> me in the right direction?
>  
> Thank you very much in advance!
> Nick
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine




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