> On 29 Apr 2016, at 17:57, Dr. Stephan Schmidt > <[email protected]> wrote: > > Dear Prof. Geuzaine, > > many thanks for the feedback! I have tried to use exactly the same procedure, > but gmsh simply crashes without an error message when I try to e.g. refine > the remeshed mesh. > > Attached is a very minimal working example: „channel_orig.msh“ is the > original mesh created by gmsh itself. It appears to be valid in all regards, > my flow solver works flawlessly on this. „Remesh_channel.geo“ is the file I > actually open for remeshing and I manage to remesh the geometry successfully. > > But whenever I try to refine the rather coarse remeshed cannel using the gui, > gmsh crashes without throwing any error messages and I am stuck on how to > make a finer mesh. I am using the following build and version of gmsh: >
Can you try with a recent nightly build? It works fine on my machine. > Info : ------------------------------------------------------- > Info : Gmsh version : 2.11.0 > Info : Build OS : MacOSX > Info : Build options : Ann Bamg Bfgs Blas(Custom) Blossom Chaco > DIntegration Dlopen Fltk Gmm Jpeg(Fltk) Kbipack Lapack(Custom) MathEx Med > Mesh Metis Mmg3d Mpeg NativeFileChooser Netgen ONELAB ONELABMetamodel > OpenCascade OpenGL OptHom PETSc Parser Plugins Png(Fltk) Post SLEPc Salome > Solver Tetgen(1.5) Voro3D Zlib > Info : Build date : 20151107 > Info : Build host : Christophes-Mac.local > Info : Packager : geuzaine > Info : Executable : /Applications/Gmsh.app/Contents/MacOS/gmsh > Info : Home directory : /Users/schmidt/ > Info : Launch date : Fri Apr 29 17:47:49 2016 > Info : Command line : /Applications/Gmsh.app/Contents/MacOS/gmsh > Info : ------------------------------------------------------- > > I would be very thankful if you could kindly provide feedback with respect to > this: > > - How can I generate a finer mesh? Ideally, I would love to carry over the > Delauney-weights associated with the original points into the remeshing > information. You can use any of the standard methods to define element sizes: global factor, fields (e.g. defined on a mesh), etc. > - Does the remeshed mesh also contain the same physical boundaries as the > original mesh or do I have to re-identify the different boundaries afterwards > manually? I know from the .stl 3D example how to do this when each physical > boundary is contained within its own Currently the "compounds" create new geometrical entities - you thus need to define the Physical entities using the new tags. However, we are working on a new implementation of the remeshing tools for Gmsh 3.0, which will change the workflow: the "Compound" command will become a meshing constraint command, and will not create new entities. Christophe > .stl file, but I would much appreciate hints on how to match a compound > quantity with a physical surface and consequently a boundary marker in the > case here, where everything stems from a single .msh file. > > Regards and many thanks, > Stephan Schmidt > > <channel_orig.msh> > <Remesh_channel.geo> > >> Am 28.04.2016 um 21:53 schrieb Christophe Geuzaine <[email protected]>: >> >>> >>> On 27 Apr 2016, at 01:49, Dr. Stephan Schmidt >>> <[email protected]> wrote: >>> >>> Dear all, >>> >>> I am trying to use gmsh to remesh a 2D geometry. >>> >>> So far, following the 3D examples (that is having a 2D stl surface as input >>> to generate a 3D mesh) work fabulously just following the examples on >>> compound surfaces, such as the one found here: >>> http://people.sc.fsu.edu/~jburkardt/examples/gmsh/t13.geo >>> >>> But for my problem, I would need to remesh a 2D geometry (that is having a >>> non-overlapping planar graph in a .msh file as input) seeking a 2D triangle >>> mesh as output with reparameterized boundary graphs. >>> >>> Is there any way of doing this as elegantly as the above link does for >>> surfaces? >>> >> >> Sure, you can use the exact same procedure... >> >> >>> Regards and many thanks, >>> Stephan Schmidt >>> _______________________________________________ >>> 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 >> >> Tetrahedron V, July 4-5 2016: http://tetrahedron.montefiore.ulg.ac.be >> Free software: http://gmsh.info | http://getdp.info | http://onelab.info > > _______________________________________________ > 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 Tetrahedron V, July 4-5 2016: http://tetrahedron.montefiore.ulg.ac.be Free software: http://gmsh.info | http://getdp.info | http://onelab.info _______________________________________________ gmsh mailing list [email protected] http://onelab.info/mailman/listinfo/gmsh
