Add mesh and geo for unsteady FGM laminar premixed CH4 flame test (companion to SU2#2641)

Author: Tahsin Berk Kiymaz

flamelet/08_laminar_premixed_ch4_flame_unsteady/1d_chamber.geo

@@ -0,0 +1,46 @@
+N=0.00002;
+dy=5e-5;
+//+
+Point(1) = {0, 0, 0, N};
+Point(2) = {0.01, 0, 0, 0.2*N};
+Point(3) = {0.01, dy, 0, 0.2*N};
+Point(4) = {0.0, dy, 0, N};
+Point(9) = {0.0100+dy, 2*dy, 0, N};
+Point(10) = {0.010, 2*dy, 0, N};
+Point(11) = {0.0100+dy, 9*dy, 0, N};
+Point(13) = {0.0100+8*dy, 0.00, 0, N};
+Point(14) = {0.0100+8*dy, 2*dy, 0, N};
+//+
+Line(1) = {1, 4};
+Line(2) = {4, 3};
+Line(3) = {3, 2};
+Line(4) = {2, 1};
+Line(6) = {9, 11};
+Line(10) = {13, 14};
+Line(11) = {2, 13};
+//+
+Circle(5) = {3, 10, 9};
+Circle(9) = {14, 9, 11};
+//+
+Transfinite Curve {3, 1} = 2 Using Progression 1;
+Transfinite Curve {4, 2} = 1000 Using Progression 1;
+//+
+//+
+Physical Curve("inlet", 12) = {1};
+Physical Curve("symmetry_bottom", 13) = {4, 11};
+Physical Curve("outlet", 14) = {9, 10};
+Physical Curve("wall", 15) = {6, 5, 2};
+//+
+Curve Loop(1) = {2, 3, 4, 1};
+//+
+Plane Surface(1) = {1};
+//+
+Curve Loop(2) = {6, -9, -10, -11, -3, 5};
+//+
+Plane Surface(2) = {2};
+//+
+Transfinite Surface {1};
+//+
+Physical Surface("interior", 16) = {1, 2};
+//+
+Recombine Surface {1, 2};