clean…

bar_quadrangle.geo
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			h = .6;
			Point(1) = {0, 0, 0, h};
			Point(2) = {10, 0, 0, h};

			Point(3) = {0, 1., 0, h};
			Point(4) = {10, 1., 0, h};

			Line(1) = {1, 2};
			//+
			Line(2) = {4, 3};
			//+
			Line(3) = {2, 4};
			//+
			Line(4) = {3, 1};
			//+
			Line Loop(1) = {1, 3, 2, 4};
			//+
			Plane Surface(1) = {1};


			Physical Line("BC") = {4, 3, 1, 2};
			Physical Surface("bulk") = {1};

			Transfinite Surface "*";
			Recombine Surface {1};
			Mesh.SecondOrderIncomplete = 1;