Dear Kate, This is "normal" : by default the tolerance to distinguish separate points/vertices is set to 1e-6 times the size of the model bounding box. Set e.g.
Geometry.Tolerance = 1e-12; at the beginning of your script. Christophe > On 21 Sep 2016, at 14:26, look <[email protected]> wrote: > > Hello all, > > I think I found a bug related to the extrusion (and recombination) of > relatively small surfaces. > > The problem occurs when you try to extrude very small 2-D cells into the > third dimension while having a huge domain, like it is often necessary for a > resolved boundary layer mesh for a 2-D airfoil simulation. > Gmsh then fails to recombine the extruded mesh into quadrangles. > > You can test this with the attached minimal example. It creates the mesh well > until you uncomment the last line. You can then see in the GUI > statistics-panel, that gmsh created triangles, which is obviously not > intended. > > Please see also the related discussion at cfd-online.com: > http://www.cfd-online.com/Forums/openfoam-solving/164600-gmshtofoam-fatal-error.html > > Best regards, > > Kate > > > <main.geo.tar.gz>_______________________________________________ > gmsh mailing list > [email protected] > http://onelab.info/mailman/listinfo/gmsh -- Prof. Christophe Geuzaine University of Liege, Electrical Engineering and Computer Science http://www.montefiore.ulg.ac.be/~geuzaine Free software: http://gmsh.info | http://getdp.info | http://onelab.info _______________________________________________ gmsh mailing list [email protected] http://onelab.info/mailman/listinfo/gmsh
