// Gmsh project created on Sat Apr 29 15:58:16 2006
Point(1) = {0,0,0,0.3};
Point(2) = {2,0,0,0.3};
Point(3) = {-2,0,0,0.3};
Point(4) = {0,-1,0,0.3};
Point(5) = {0,-1,0,0.3};
Point(6) = {0,1,0,0.3};
Point(7) = {-1,0,0,0.3};
Point(8) = {1,0,0,0.3};
Ellipse(1) = {3,1,7,6};
Ellipse(2) = {6,1,8,2};
Ellipse(3) = {2,1,8,4};
Ellipse(4) = {4,1,7,3};
Line Loop(5) = {2,3,4,1};
Plane Surface(6) = {5};
Extrude {{0,0,20}, {0,0,1}, {0,0,1}, Pi} {
  Surface{6}; Layers{20,1};
}

// "Extrude" already creates the volume
//Surface Loop(76) = {19,-6,15,28,23,27};
//Volume(77) = {76};

//inlet
Physical Surface(73)= {6};

//outlet
Physical Surface(74) = {28};

//walls
Physical Surface(75) = {19,23,27,15};

Physical Volume(78) = {1};



