Using Gmsh to create an Axisymmetric Mesh [Openfoam]

[@guoxinxin693]

So informative tutorial, thanks!! :)

[@robloxbladeball12]

Mesh.Algorithm=8; Mesh.Smoothing=2; Mesh.RecombineAll=1; //inputs D = 1.0; F=0.5*D; length_bound = 5.0*D; length_inner = 3.0*D; width_inner = D; width_bound = 3.0*D; //size nc_x = 80; nc_bx = 10; size_axis = length_inner/nc_x; size_bound = length_bound/nc_bx; size_axis_big = length_inner/(0.2*nc_x); //points Point(1)={0,0,0,size_axis}; Point(2)={0.5*length_inner,0,0,size_axis}; Point(3)={0.5*length_inner,width_inner,0,size_axis}; Point(4)={-0.5*length_inner,width_inner,0,size_axis}; Point(5)={-0.5*length_inner,0,0,size_axis}; Point(6)={0.5*length_bound,0,0,size_axis_big}; Point(7)={0.5*length_bound,width_bound,0,size_axis_big}; Point(8)={-0.5*length_bound,width_bound,0,size_axis_big}; Point(9)={-0.5*length_bound,0,0,size_axis_big}; //Line 1-2 Line(100)={1,2}; Line(101)={2,3}; Line(102)={4,3}; Line(103)={5,4}; Line(104)={5,1}; //Line 2-6 Line(200)={2,6}; Line(201)={6,7}; Line(202)={8,7}; Line(203)={9,8}; Line(204)={9,5}; //slanted lines Line(300)={3,7}; Line(301)={8,4}; //Close loop 1 Line Loop(400) = {100,101,-102,-103,104};//block 0 Line Loop(401) = {200,201,-300,-101};//block 1 Line Loop(402) = {300,-202,301,102};//block 2 Line Loop(403) = {103,-301,-203,204};//block 3 //Surfaces Plane Surface(500) = {400}; Plane Surface(501) = {401}; Plane Surface(502) = {402}; Plane Surface(503) = {403}; //Rotate about x-axis 2,5 deg Rotate{(1,0,0),(0,0,0),-2.5*Pi/180.0} { Surface {500,501,502,503}; } //Angular extrude to make 3D mesh new_entities[] = Extrude {(1,0,0),(0,0,0),5*Pi/180.0} { Surface {500,501,502,503}; Layers{1}; Recombine; } Physical Surface("right", 579) = {539}; //+ Physical Surface("top", 580) = {552}; //+ Physical Surface("left", 581) = {576}; //+ Physical Surface("front", 582) = {561, 522, 578, 539}; //+ Physical Surface("back", 583) = {502, 500, 501, 503}; //+ Physical Curve("bottom", 584) = {200, 100, 104, 204};