On 01 Jul 2014, at 16:07, Amarpal Singh Kapoor <amarpalsinghkap...@gmail.com> 
wrote:

> Dear users,
> 
> I'm new to gmsh and am trying to refine a mesh in specific regions. Lets 
> consider my domain to be a unit square and my current aim is to have a finer 
> mesh along the boundaries. I'm using the method of attractor and threshold to 
> refine my mesh locally (like in t10.geo). I can have a successful refinement 
> on any 3 boundaries only. The moment I include the 4th edge in the edge list, 
> I get an almost uniform mesh. 
> 
> Q1. What is the reason behind this?
> 

You should set

Mesh.CharacteristicLengthExtendFromBoundary = 0;




> <image.png>
> 
> Q2. Is there a better way of achieving this type of refinement?
> 
> I have attached my .geo file with this email.
> 
> Kind Regards,
> Amar
> <mesh71_2d_box.geo>_______________________________________________
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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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