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hertz.geo
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			cl1 = 0.005;
			cl2 = 0.005;
			cl3 = 0.001;
			Dy = 0.0;
			radius = 0.1;
			y = 0.1;
			epsilon = 1e-3;

			Point(1) = {0, y, 0, cl1};
			Point(2) = {radius, radius + y, 0, cl2};
			Point(3) = {-radius, radius + y, 0, cl2};
			Point(4) = {0.2, 0.1 + epsilon, 0, 0.75*cl3};
			Point(5) = {-0.2, 0.1 + epsilon, 0, 0.75*cl3};
			Point(6) = {-0.2, -0.15, 0, 10*cl3};
			Point(7) = {0.2, -0.15, 0, 10*cl3};
			Point(8) = {0, radius + y, 0, cl2};
			Point(9) = {0, y, 0, cl3*0.5};
			Point(10) = {0, y-0.025, 0, cl3*0.5};
			Point(11) = {radius/3, y-0.0075, 0, cl3*0.5};
			Point(12) = {-radius/3, y-0.0075, 0, cl3*0.5};

			Circle(1) = {3, 8, 1};
			Circle(2) = {1, 8, 2};

			Line(3) = {2, 8};
			Line(13) = {8, 3};
			Line(4) = {6, 7};
			Line(5) = {7, 4};
			Line(6) = {4, 9};
			Line(7) = {5, 6};
			Line(8) = {9, 5};

			Line Loop(9) = {2, 3, 13, 1};
			Plane Surface(9) = {9};

			Line Loop(11) = {6, 8, 7, 4, 5};
			Plane Surface(11) = {11};

			Point{10} In Surface{11};
			Point{11} In Surface{11};
			Point{12} In Surface{11};

			Physical Line("contact_bottom") = {6, 8};
			Physical Line("contact_top") = {1, 2};

			Physical Line("top") = {3, 13};
			Physical Line("bottom") = {4};

			Physical Surface("uppper") = {9};
			Physical Surface("lower") = {11};