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2D rectangle in Gmsh -naming physical lines

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Old   January 16, 2018, 11:49
Default 2D rectangle in Gmsh -naming physical lines
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Ruby Marshall
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As part of a simulation I am trying to generate a 2D rectangle in Gmsh with significantly more elements in one direction than the other.

The aim is to use it with Su2. Therefore I want to define which lines are the 'left', 'right', 'upper' and 'lower' to enable my boundary conditions to be applied by the solver.

However there is a syntax error for the lines under '//Boundaries'

Any suggestion as to how i fix this?


Thank you


mesh code:

//+
Point(1) = {-1, 0.1, 0, 1.0};
//+
Point(2) = {1, 0.1, 0, 1.0};
//+
Point(3) = {1, -0.1, 0, 1.0};
//+
Point(4) = {-1, -0.1, 0, 1.0};
//+
Line(1) = {1, 2};
//+
Line(2) = {2, 3};
//+
Line(3) = {3, 4};
//+
Line(4) = {4, 1};
//+
Line Loop(1) = {1, 2, 3, 4};
//+
Plane Surface(1) = {1};
//+
Transfinite Line {3, 1} = 2000 Using Progression 1;
//+
Transfinite Line {4, 2} = 5 Using Progression 1;
//+
Transfinite Surface {1};
//+
Recombine Surface {1};


//Boundaries
Physical Line (“upper_wall”) = Line(1) ;
Physical Line (“lower_wall”) = Line(3) ;
Physical Line (“left”) = Line(4) ;
Physical Line (“right”) = Line(2) ;


Physical Surface (“tube”) (1);
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Old   February 10, 2018, 04:53
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This should work

//Boundaries
Physical Line ("upper_wall") = {1};
Physical Line ("lower_wall") = {3};
Physical Line ("left") = {4};
Physical Line ("right") = {2};

Physical Surface("tube") = {1};

I don't know if it's the web site font but Gmsh doesn't recognize the quotation marks of the geo file you post
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2d mesh, boundaries definition, gmsh, gmsh syntax, su2 mesh

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