[Gmsh] Transfinite volume

[geomazanakis at gmail.com]

Hello everyone... I need your help please

I want to create a 3d mesh with hex only in a wind blade geometry (please 
see the attachment). I get the geometry to an .stp file, so I can not 
change it.

I use a scrip file (please see the attachment) to transfinite and recombine 
the lines surfaces and volumes.

When I create the mesh I get an error like 

Error   : Cannot tetrahedralize volume with quadrangles on boundary 

or

Error   : Transfinite algorithm only available for 5- and 6-face volumes

There is any solution for my problem?

thank you in advance


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Mesh.ElementOrder=2;
Mesh.SecondOrderIncomplete=1;
Mesh.Optimize = 1;
Mesh.Algorithm3D=4;
Delete{ Line{2}; Line{18}; }



Transfinite Line {17, 21, 11, 10}=90;
Transfinite Line {16, 14, 13, 9, 7}=30;
Transfinite Line {15, 8, 3, 1, 20, 21}=10;
Transfinite Line {4, 5, 6, 20, 12, 19}=2;
Transfinite Volume (1);
Recombine Volume(1);
Physical Volume(1) = {1};