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[Gmsh] Structured mesh in gmsh without Extrude function |
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January 5, 2010, 15:24 |
Structured mesh in gmsh without Extrude function
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#1 |
Senior Member
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Hey everyone,
I have had good luck meshing tetras and prisms with gmsh. However now I am wanting to created a structured hex mesh. Here is what I currently can do. It requires two extrude functions and can only be controlled by the first parameter: ______________________________________ Point(1) = {0,0,0,0.1}; Point(2) = {1,0.2,0,0.1}; Point(3) = {2,0,0,0.1}; Spline(1) = {1,2,3} ; Extrude {0,1,0} { Line{1}; Layers{5}; Recombine; } Extrude {0,0,.1} { Surface{5}; Layers{1}; Recombine; } ______________________________________ Here is what I want to do. This shape requires the mesh to be controlled by two parameters, and allows you to do much much more with it. Is it possible to do this? ______________________________________ Point(1) = {0,0,0,0.1}; Point(2) = {1,0.2,0,0.1}; Point(3) = {2,0,0,0.1}; Spline(1) = {1,2,3} ; Point(4) = {-.5,1,0,0.1}; Point(5) = {1,1.2,0,0.1}; Point(6) = {2.5,1,0,0.1}; Spline(2) = {4,5,6} ; Line(3)={1,4}; Line(4)={3,6}; Line Loop(5) = {1,4,-2,-3} ; Plane Surface(6) = {5} ______________________________________ Thanks for your help! |
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January 6, 2010, 19:38 |
Got it to work!
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#2 |
Senior Member
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Persistence is victorious again...
A big thanks to dolfyn.net or I may never have figured it out: Here is my script: Code:
// Kudos to dolfyn for an awesome tutorial // http://www.dolfyn.net/dolfyn/gmsh/tutorial06.html Point(1) = {0,0,0,0.1}; Point(2) = {1,0.2,0,0.1}; Point(3) = {2,0,0,0.1}; Spline(1) = {1,2,3} ; Point(4) = {-0.5,1,0,0.1}; Point(5) = {1,1.2,0,0.1}; Point(6) = {2.5,1,0,0.1}; Spline(2) = {4,5,6} ; Line(3)={1,4}; Line(4)={3,6}; Line Loop(1) = {1,4,-2,-3} ; Plane Surface(1) = {1}; // Tell Gmsh how many cells you want per edge Transfinite Line{3,4} = 10; Transfinite Line{1,2} = 15; // Tell Gmsh what the corner points are(going clockwise or counter-clockwise): Transfinite Surface{1} = {1,3,6,4}; // Recombine the triangles into quads: Recombine Surface{1}; // Havent tested this yet, but doesnt seem to hurt: Mesh.Smoothing = 100; // Extrued for a psudo 2D mesh :) Extrude {0,0,0.15} {Surface{1}; Layers{1}; Recombine; } |
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December 6, 2013, 08:52 |
structured mesh: transfinite surface with more than 6 corners
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#3 |
New Member
Join Date: Dec 2013
Posts: 3
Rep Power: 12 |
Hello,
I need to create a mesh in a wind blade for my phd. I want to use hex element with structured mesh. I will get the geometry in a .stp file (see the attach please) so I can not interfere in the geometry. I merge the stp with a scrip (see the attach please) to recombine and transfinite but I have problems with the surface which has more than 5 corners.... the files are in this link https://dl.dropboxusercontent.com/u/...RightBlade.zip Any ideas please? |
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