//+ Point(5) = {0, 2.4, 0, 1.0}; //+ Point(6) = {5, 2.4, 0, 1.0}; //+ Point(7) = {5, 2.6, 0, 1.0}; //+ Point(8) = {0, 2.6, 0, 1.0}; //+ Line(1) = {8, 5}; //+ Line(2) = {5, 6}; //+ Line(3) = {6, 7}; //+ Line(4) = {7, 8}; //+ Line Loop(10) = {1, 2, 3, 4}; //+ Plane Surface(11) = {10}; //+ Physical Surface(12) = {11}; //+ Physical Line(13) = {1, 4, 3, 2}; Field[5] = Distance; Field[5].FacesList = {11}; Field[5].NNodesByEdge = 100; Field[6] = Threshold; Field[6].IField = 5; Field[6].LcMin = 0.01; Field[6].LcMax = 0.5; Field[6].DistMin = 10; Field[6].DistMax = 15; Background Field = 6; //+