problem in transfiniting the volume in gmsh
 

hello guys,

I want to do 3D mesh on imported nozzle geometry in gmsh. I can't modify anything regarding the geometry nor can insert anything like points or lines or planes. All I can do is transfinite and recombine it. But when I transfinite and recombine the surface and when I do 3D mesh, surface mesh looks good but inside the volume it scrambles out. So to get the ordered mesh, I need to transfinite the volume. But to transfinite the volume it needs 5 to 6 faces or or number of points or something like that, but I cant create any planes, so unable to do transfinite volume. Only

please anybody has some ideas about this

thank you