Dear Florent, we have an example in MOAB, you can take a look It has to be modified to export just the boundary quads We usually run it in parallel for big meshes, and its output is in hdf5 format. http://ftp.mcs.anl.gov/pub/fathom/moab-docs/GenLargeMesh_8cpp-example.html You can afterwards run mbconvert to export in exodus format mbconvert large.h5m large.exo We used this to generate billions of hexas, to test I/O our exodus is in serial, and never pushed it this high, but you could try geometry is very regular you can control though dx, dy, etc Would something like this work? Iulian ________________________________ From: De Martin Florent [[email protected]] Sent: Friday, March 11, 2016 4:09 AM To: Grindeanu, Iulian R.; [email protected] Subject: RE: CGM doc Dear Iulian, Thank you for your prompt response and your advices. To answer your questions, EFISPEC3D reads ExodusII mesh file generated by CUBIT. Boundary conditions are either free surface (made of QUAD) or absorbing boundaries (made of QUAD). But unfortunately, the NetCDF API inside CUBIT fail to generate a mesh of 200+ millions of hexa. The mesh is very basic: only a cubic domain meshed by millions of hexa. So I was looking for an open-source code (CUBIT is not) to generate such a mesh… Best regards, Florent De : Grindeanu, Iulian R. [mailto:[email protected]] Envoyé : jeudi 10 mars 2016 17:00 À : De Martin Florent; [email protected] Objet : RE: CGM doc Hello, CGM alone would not be enough to generate a mesh CGM is mostly a wrapper around other geometry kernels, ACIS or OCC/OCE based. To generate a mesh you would need the SIGMA stack. http://sigma.mcs.anl.gov/ I am not familiar with what format you need your mesh for EFISPEC3D; I assume it is similar to NEK5000 solver, which is a spectral element method too. (so Nek needs a hexahedral mesh) And what is the input geometry format? Terrain data? We have some capabilities developed for ice sheet modeling. At the core, they do need a quadrilateral mesher for surfaces, which are then extruded/swept to form hexahedral elements. Also, it is assumed that the domain of interest does not have internal caves/tunnels, so the sweeping in vertical direction is trivial. I am not sure how these would help your project. Iulian ________________________________ From: [email protected]<mailto:[email protected]> [[email protected]] on behalf of De Martin Florent [[email protected]] Sent: Thursday, March 10, 2016 9:19 AM To: [email protected]<mailto:[email protected]> Subject: [cgma-dev] CGM doc Dear CGM support, I am interested to generate large scale finite element meshes for the spectral-element code EFISPEC3D (http://efispec.free.fr) I have downloaded (from git) and compiled CGM, but I can hardly find a user documentation. Would you please send it to me ? Best regards, Florent DE MARTIN P Pensez à l'environnement avant d'imprimer ce message Think Environment before printing Le contenu de ce mél et de ses pièces jointes est destiné à l'usage exclusif du (des) destinataire(s) désigné(s) comme tel(s). En cas de réception par erreur, le signaler à son expéditeur et ne pas en divulguer le contenu. L'absence de virus a été vérifiée à l'émission, il convient néanmoins de s'assurer de l'absence de contamination à sa réception. The contents of this email and any attachments are confidential. They are intended for the named recipient(s) only. If you have received this email in error please notify the system manager or the sender immediately and do not disclose the contents to anyone or make copies. This email was scanned for viruses, vandals and malicious content. P Pensez à l'environnement avant d'imprimer ce message Think Environment before printing Le contenu de ce mél et de ses pièces jointes est destiné à l'usage exclusif du (des) destinataire(s) désigné(s) comme tel(s). En cas de réception par erreur, le signaler à son expéditeur et ne pas en divulguer le contenu. L'absence de virus a été vérifiée à l'émission, il convient néanmoins de s'assurer de l'absence de contamination à sa réception. The contents of this email and any attachments are confidential. They are intended for the named recipient(s) only. If you have received this email in error please notify the system manager or the sender immediately and do not disclose the contents to anyone or make copies. This email was scanned for viruses, vandals and malicious content.