Hi, I have two questions :1- How do you create hybrid meshes in 2-D (quad-dominant with a few triangles) ? Until now, I am using the Recombine option, but often I get non-convex quadrilaterals. In the picture attached to this message, you can see that two elements (in black) are non-convex quads and that's a problem ... So, often I change the characterisc length in the hope that I will have only fine quadrilaterals. Is it possible to require that all quadrilaterals are convex ?
2- In 3-D, when I try "Recombine Volume", it doesn't work. So, how is it possible with gmsh to create 3-D hexahedral-dominant meshes (with some tets, pyramids and wedges) ?
Thank you for your help. PS : I am using gmsh 2.24
<<inline: ellipse_pml.jpg>>
// The simplest construction of Gmsh's scripting language is the
// `affectation'. The following command defines a new variable `lc':
// lc va etre la longueur caractéristique dans tout le maillage
lc = 0.1;
a = 0.5; b = 1.76776695296637;
// a = 0.5; b = 1.25;
//a = 0.3125; b = 1.39754248593736;
// a = 1.0; b = 2.5;
c = 0.5;
d = 0.5;
Point(1) = {0.0, b, 0.0, lc};
Point(2) = {a, 0.0, 0.0, 0.8*lc} ;
Point(3) = {0.0, 0.0, 0.0, lc};
Point(4) = {a+c, 0, 0.0, 0.8*lc};
Point(5) = {a+c, b+d, 0.0, lc} ;
Point(6) = {0, b+d, 0.0, lc} ;
Line(1) = {2,4} ;
Line(2) = {4,5} ;
Line(3) = {6,5} ;
Line(4) = {1,6} ;
Ellipse(5) = {1,3,2,2};
Line Loop(1) = {1,2,-3,-4,5} ;
e0[] = Symmetry{0.0,1.0,0.0,0.0}{ Duplicata{ Line{5}; } };
e1[] = Symmetry{0.0,1.0,0.0,0.0}{ Duplicata{ Line{2}; Line{3}; } };
Physical Line(1) = {5,e0[0]};
Physical Line(3) = {2,3,e1[0],e1[1]};
Plane Surface(1) = {1} ;
s0[] = Symmetry{0.0,1.0,0.0,0.0}{ Duplicata{ Surface{1}; } };
Recombine Surface {1,s0[0]} = 100;
Physical Surface(1) = {1,s0[0]};
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