// Gmsh project created on Wed Sep 13 09:46:10 2017
SetFactory("OpenCASCADE");
//+
Cylinder(1) = {0, 0, 0, 72, 0, 0, 1.75, 2*Pi};
//+
Cylinder(2) = {0, 0, 0, 80, 0, 0, 1.535, 2*Pi};
//+
BooleanDifference{ Volume{1}; Delete; }{ Volume{2}; Delete; }
//+
Cylinder(2) = {0, 0, 0, -2, 0, 0, 4.125, 2*Pi};
//+
Cylinder(3) = {-2, 0, 0, 90, 0, 0, .35, 2*Pi};
//+
Cylinder(4) = {-2, 0, 1.15, 90, 0, 0, .28, 2*Pi};
//+
Cylinder(5) = {-2, 0, -1.15, 90, 0, 0, .28, 2*Pi};
//+
Cylinder(6) = {-2, 1.15, 0, 90, 0, 0, .28, 2*Pi};
//+
Cylinder(7) = {-2, -1.15, 0, 90, 0, 0, .28, 2*Pi};
//+
BooleanUnion{ Volume{1}; Delete; }{ Volume{2}; Delete; }
//+
BooleanDifference{ Volume{8}; Delete; }{ Volume{4}; Volume{7}; Volume{3}; Volume{6}; Volume{5}; Delete; }
//+
Surface Loop(1) = {6, 12, 7, 5, 3, 1, 2, 4, 8, 9, 10, 11};
//+
Physical Surface("inside wall") = {3};
//+
Physical Surface("outside wall") = {2};
//+
Physical Surface("inlet 1") = {8};
//+
Physical Surface("inlet 2") = {7};
//+
Physical Surface("inlet 3") = {10};
//+
Physical Surface("inlet 4") = {11};
//+
Physical Volume("fluid 1") = {8};
//+
Physical Volume("fluid 2") = {8};
