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https://github.com/JuliaFEM/JuliaFEM.jl.git
synced 2026-09-27 12:16:56 +00:00
Jukka Aho
d7939551fb
New file: examples/gmsh_heat_equation/unit_square.geo (32 lines) Defines unit square [0,1]×[0,1] with: - 4 corner points with mesh size lc=0.1 - 4 boundary edges (bottom, right, top, left) - Plane surface for 2D heat equation - Physical groups labeled for boundary conditions - Triangular elements (Tri3, ElementOrder=1) - Frontal-Delaunay meshing algorithm Generate mesh with: gmsh -2 unit_square.geo -o unit_square.msh
33 lines
790 B
GLSL
33 lines
790 B
GLSL
// Gmsh geometry file: Unit square mesh for heat equation tutorial
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// Generate with: gmsh -2 unit_square.geo -o unit_square.msh
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// Mesh element size
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lc = 0.1;
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// Corner points
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Point(1) = {0, 0, 0, lc};
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Point(2) = {1, 0, 0, lc};
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Point(3) = {1, 1, 0, lc};
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Point(4) = {0, 1, 0, lc};
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// Edges
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Line(1) = {1, 2}; // Bottom
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Line(2) = {2, 3}; // Right
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Line(3) = {3, 4}; // Top
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Line(4) = {4, 1}; // Left
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// Surface
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Line Loop(1) = {1, 2, 3, 4};
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Plane Surface(1) = {1};
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// Physical groups for boundary conditions
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Physical Line("bottom") = {1};
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Physical Line("right") = {2};
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Physical Line("top") = {3};
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Physical Line("left") = {4};
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Physical Surface("body") = {1};
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// Use triangular elements
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Mesh.ElementOrder = 1; // Linear elements (Tri3)
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Mesh.Algorithm = 6; // Frontal-Delaunay for 2D
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