lc = 0.03;

Point(1) = {0,0,0,lc};
Extrude {0,0.8,0} {
  Point{1};
}
Extrude {-0.5,0,0} {
  Point{2};
}
Extrude {0,0.2,0} {
  Point{3};
}
Extrude {1,0,0} {
  Point{4};
}
Extrude {0,-0.5,0} {
  Point{5};
}
Extrude {0.1,0,0} {
  Point{6};
}
Extrude {0,0.5,0} {
  Point{7};
}
Extrude {1.1,0,0} {
  Point{8};
}
Extrude {0,-0.8,0} {
  Point{9};
}
Extrude {0.5,0,0} {
  Point{10};
}
Extrude {0,-0.2,0} {
  Point{11};
}
Extrude {-1,0,0} {
  Point{12};
}
Extrude {0,0.5,0} {
  Point{13};
}
Extrude {-0.1,0,0} {
  Point{14};
}
Extrude {0,-0.5,0} {
  Point{15};
}
Extrude {-1.1,0,0} {
  Point{16};
}
Extrude {0,-0.8,0} {
  Point{17};
}
Extrude {-0.5,0,0} {
  Point{18};
}

Line Loop(20) = {9,10,11,12,13,14,15,16,1,2,3,4,5,6,7,8};
Plane Surface(21) = {20};
Extrude {0,0,0.1} {
  Surface{21}; Layers{1,1}; Recombine;
}

// INLET
Physical Surface(104) = {82};

// OUTLET
Physical Surface(105) = {50};

// WALL
Physical Surface(106) = {54,58,62,66,70,74,78,86,90,94,98,102,42,46};

// FRONT/BOTTOM
Physical Surface(107) = {103,21};

// Creo il volume fisico
Physical Volume(1000) = {1};