[Gmsh] Problems to refine near a vertex of a L-shaped domain

[Durufle marc]

I tried to mesh a L-shaped domain. And I want to
refine locally on the vertex where the solution will
be singular. I observed that all is fine if the
refinement is large enough. If the parameter of
refinement is small (0.001 here), the produced mesh is
ugly.
I attached the details of the mesh when you zoom on
the refined vertex.

The geo file is the following :

lc = 0.1;

a = 1.0;
b = 1.0;
h = 1.0;

refine = 0.001;

Point(1) = {0, 0, 0, lc*refine};
Point(2) = {a, 0, 0, lc} ;
Point(3) = {0, b, 0, lc} ;
Point(4) = {a, -h, 0, lc} ;
Point(5) = {-h, b, 0, lc} ;
Point(6) = {-h, -h, 0, lc} ;

Line(1) = {1,3} ;
Line(2) = {3,5} ;
Line(3) = {5,6} ;
Line(4) = {6,4} ;
Line(5) = {4,2} ;
Line(6) = {2,1} ;

Line Loop(1) = {1,2,3,4,5,6} ;

// Ruled Surface(1) = {1} ;
Plane Surface(1) = {1};

Physical Line(1) = {1,2,3,4,5,6} ;

MySurface = 1;
Physical Surface(MySurface) = {1} ;

Do you have an idea to fix this problem ?


	

	
		
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