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one_circular_inclusion.geo
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			aggregate_el_size = 0.1;
			paste_el_size = 0.1;
			aggregate_radius = 0.016;
			box_size = 0.0728; // this is the edge length of the box

			Point(1) = {0, 0, 0, aggregate_el_size};
			Point(2) = {aggregate_radius, 0, 0, aggregate_el_size};
			Point(3) = {0, aggregate_radius, 0, aggregate_el_size};
			Point(4) = {-aggregate_radius, 0, 0, aggregate_el_size};
			Point(5) = {0, -aggregate_radius, 0, aggregate_el_size};

			Point(6) = {box_size/2, box_size/2, 0, paste_el_size};
			Point(7) = {-box_size/2, box_size/2, 0, paste_el_size};
			Point(8) = {-box_size/2, -box_size/2, 0, paste_el_size};
			Point(9) = {box_size/2, -box_size/2, 0, paste_el_size};
			Point(10) = {0, -box_size/2, 0, paste_el_size};
			Point(11) = {0, box_size/2, 0, paste_el_size};
			Circle(1) = {2, 1, 3};
			Circle(2) = {3, 1, 4};
			Circle(3) = {4, 1, 5};
			Circle(4) = {5, 1, 2};
			Line(9) = {9, 6};
			Line(10) = {6, 11};
			Line(11) = {11, 7};
			Line(12) = {7, 8};
			Line(13) = {8, 10};
			Line(14) = {10, 9};
			Line Loop(13) = {4, 1, 2, 3};
			Plane Surface(14) = {13};
			Line Loop(17) = {9, 10, 11, 12, 13, 14};
			Plane Surface(18) = {17, 13};
			Physical Surface("aggregate") = {14};
			Physical Surface("paste") = {18};
			Physical Line("bottom") = {13, 14};
			Physical Line("right") = {9};
			Physical Line("top") = {10, 11};
			Physical Line("left") = {12};
			Physical Point("top_center") = {10};
			Physical Point("bottom_center") = {11};