Update comments in geometry files

Author: nikoscham

tutorials/heat-conduction-2d-fin-gmsh.html

@@ -243,9 +243,9 @@ <h3 id="gmshgeofile"><a name="gmshgeofile"></a>Example Gmsh <code>.geo</code> Fi
     </p>
 
     <pre class="prettyprint">
-// 2D Rectangle: 4m (width) x 2m (height) with physical lines for boundary labeling
+// 2D Rectangle: 4m (width) x 2m (height)
 
-lc = 0.7; // Characteristic length (mesh density)
+lc = 0.7; // Characteristic length
 
 // Points (x, y, z, mesh size)
 Point(1) = {0, 0, 0, lc}; // Bottom left
@@ -269,7 +269,7 @@ <h3 id="gmshgeofile"><a name="gmshgeofile"></a>Example Gmsh <code>.geo</code> Fi
 Physical Line("top")    = {3};
 Physical Line("left")   = {4};
 
-// Physical Surface (optional, for FEM domains)
+// Physical Surface
 Physical Surface("domain") = {1};
 
 // Generate 2D mesh

tutorials/heat-conduction-2d-rhom-fin-gmsh.html

@@ -232,10 +232,10 @@ <h3 id="gmshgeofile"><a name="gmshgeofile"></a>Example Gmsh <code>.geo</code> Fi
 dx = 1.0; // Horizontal skew amount (controls rhomboid angle)
 
 // Points (x, y, z, mesh size)
-Point(1) = {0,    0, 0, lc};     // Bottom left
-Point(2) = {4,    0, 0, lc};     // Bottom right
-Point(3) = {4+dx, 2, 0, lc};     // Top right (shifted)
-Point(4) = {dx,   2, 0, lc};     // Top left  (shifted)
+Point(1) = {0,    0, 0, lc}; // Bottom left
+Point(2) = {4,    0, 0, lc}; // Bottom right
+Point(3) = {4+dx, 2, 0, lc}; // Top right (shifted)
+Point(4) = {dx,   2, 0, lc}; // Top left  (shifted)
 
 // Lines
 Line(1) = {1, 2}; // bottom
@@ -256,9 +256,9 @@ <h3 id="gmshgeofile"><a name="gmshgeofile"></a>Example Gmsh <code>.geo</code> Fi
 // Physical Surface
 Physical Surface("domain") = {1};
 
-// Recombine to quads
-Recombine Surface{1};
-Mesh.ElementOrder = 2;
+// Generate 2D mesh
+Recombine Surface{1}; // Turn triangle elements into quadrilaterals
+Mesh.ElementOrder = 2; // Set quadratic elements 
 Mesh 2;</pre
     >
 

tutorials/rect.geo

@@ -1,16 +1,12 @@
 // 2D Rectangle: 4m (width) x 2m (height)
-// With Physical Lines for boundary labeling
 // Use the command "gmsh rect.geo -2" to generate the mesh
 
-lc = 0.7; // Characteristic length (mesh density)
-// Note: In the structured case, the lc = 0.2 no longer directly determines the mesh size,
-// as the Transfinite Curve commands explicitly set the number of elements along each boundary
-
+lc = 0.7; // Characteristic length
 // Points (x, y, z, mesh size)
-Point(1) = {0, 0, 0, lc};     // Bottom left
-Point(2) = {4, 0, 0, lc};     // Bottom right
-Point(3) = {4, 2, 0, lc};     // Top right
-Point(4) = {0, 2, 0, lc};     // Top left
+Point(1) = {0, 0, 0, lc}; // Bottom left
+Point(2) = {4, 0, 0, lc}; // Bottom right
+Point(3) = {4, 2, 0, lc}; // Top right
+Point(4) = {0, 2, 0, lc}; // Top left
 
 // Lines
 Line(1) = {1, 2}; // bottom
@@ -28,7 +24,7 @@ Physical Line("right")  = {2};
 Physical Line("top")    = {3};
 Physical Line("left")   = {4};
 
-// Physical Surface (optional, for FEM domains)
+// Physical Surface
 Physical Surface("domain") = {1};
 
 // Create structured mesh

tutorials/rhom.geo

@@ -3,10 +3,10 @@ lc = 0.7; // Characteristic length
 dx = 1.0; // Horizontal skew amount (controls rhomboid angle)
 
 // Points (x, y, z, mesh size)
-Point(1) = {0,    0, 0, lc};     // Bottom left
-Point(2) = {4,    0, 0, lc};     // Bottom right
-Point(3) = {4+dx, 2, 0, lc};     // Top right (shifted)
-Point(4) = {dx,   2, 0, lc};     // Top left  (shifted)
+Point(1) = {0,    0, 0, lc}; // Bottom left
+Point(2) = {4,    0, 0, lc}; // Bottom right
+Point(3) = {4+dx, 2, 0, lc}; // Top right (shifted)
+Point(4) = {dx,   2, 0, lc}; // Top left  (shifted)
 
 // Lines
 Line(1) = {1, 2}; // bottom
@@ -27,7 +27,7 @@ Physical Line("left")   = {4};
 // Physical Surface
 Physical Surface("domain") = {1};
 
-// Recombine to quads
-Recombine Surface{1};
-Mesh.ElementOrder = 2;
+// Generate 2D mesh
+Recombine Surface{1}; // Turns triangle mesh into quads
+Mesh.ElementOrder = 2; // Set quadratic elements 
 Mesh 2;