On Jun 12, 2013, at 6:55 PM, Cody Permann <[email protected]> wrote:
> Sent from my iPhone > > On Jun 12, 2013, at 5:12 PM, Ataollah Mesgarnejad > <[email protected]> wrote: > >> John, >> >> I did and it worked perfectly the problem is I can't mesh my original >> problem in libMesh. > > You don't have to generate your mesh in libMesh. You just have to be > more careful about how you mesh in Cubit. You might try duplicating > and meshing a surface with the same parameters so that they are > identical. If you are Tet-meshing your final volume anyway, this > should be fine. Personally I try to use sweep with autosmooth turned > off whenever possible. I can try playing with CUBIT see if I can use a trick to have the same surface mesh for the periodic BCs pair. > I'm assuming your geometry is more complex > though which is why you aren't using hexes. I rather not use HEX's. I'm doing variational fracture mechanics (look here for example) that is super sensitive to any mesh directionality. My only good option is tridelaunay meshes. Thanks, Ata > > Cody > >> >> Ata >> On Jun 12, 2013, at 5:44 PM, John Peterson <[email protected]> wrote: >> >>> >>> On Wed, Jun 12, 2013 at 4:34 PM, Ataollah Mesgarnejad >>> <[email protected]> wrote: >>> Cody, >>> >>> You were right that seems to be the problem. CUBIT splits the HEX cells >>> differently on the two different surfaces thus the error. >>> >>> Now is there a more general way built in libMesh to enforce periodic BCs >>> without requiring nodes to be exactly translated? >>> >>> Can you just generate your mesh with build_cube(), setting the element type >>> to TET4? The nodes on opposing faces should match up almost exactly then. >>> >>> -- >>> John >> >> ------------------------------------------------------------------------------ >> This SF.net email is sponsored by Windows: >> >> Build for Windows Store. >> >> http://p.sf.net/sfu/windows-dev2dev >> _______________________________________________ >> Libmesh-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/libmesh-users ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
