
split=0.75;
gap=1e-2;

mshSize=1e-2;

Point(0)={0,0,0,mshSize};
Point(1)={1,0,0,mshSize};
Point(2)={1,1,0,mshSize};
Point(3)={split,1,0,mshSize};
Point(4)={split-gap,1,0,mshSize};
Point(5)={0,1,0,mshSize};

Line(0)={0,1};
Line(1)={1,2};
Line(2)={2,3}; // flux area B
Line(3)={3,4}; // Gap
Line(4)={4,5}; // flux area A
Line(5)={5,0};

Physical Line(10)={0}; // ground
Physical Line(11)={4}; // flux area A
Physical Line(12)={3}; // gap
Physical Line(13)={2}; // flux area B

Physical Point(14)={4}; // separation between A and B

Line Loop(6)={0:5};
Plane Surface(7)={6};

Physical Surface(15)={7};
