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/* Simple tetrahedral domain with one element
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// define variable used for characteristic length
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// define geometric entities
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Point(1) = {0.0, 0.0, 0.0, lc};
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Point(2) = {1.0, 0.0, 0.0, lc};
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Point(3) = {0.2, 0.8, 0.0, lc};
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Point(4) = {0.3, 0.8, 2.0, lc};
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Line Loop (8) = {2, 6, -3};
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Line Loop (10) = {2, -4, -1};
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Line Loop (12) = {3, -5, -1};
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Line Loop (14) = {4, 6, -5};
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Plane Surface (8) = {8};
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Plane Surface (10) = {10};
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Plane Surface (12) = {12};
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Plane Surface (14) = {14};
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// define surface loop
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Surface Loop (16) = {14, 10, 8, 12};
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// define physical entities
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// define physicial surface
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Physical Surface (101) = {8, 10, 12, 14};
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// define physical volume
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Physical Volume (102) = {16};