Hi Daniel, So you say that if I scale the mesh and also scale my variables in the same analogy that would be a solution? Dave's answer was describing the way I do it. Is there any other way to do the meshing? Thank you very much both of you for your advice! Regards, J.
On Mon, Aug 26, 2013 at 5:17 PM, Daniel Wheeler <[email protected]>wrote: > On Sat, Aug 24, 2013 at 10:07 AM, John Assael <[email protected]> wrote: > >> Hi, I have a very small mesh of 2cm x 1cm (2D) and I have a problem >> optimising the cell sizes in Gmsh. At this point I do it by hand with trial >> and error and also I saw that the triangulation algorithm affects my >> results. For example if I select Frontal I get quite different results. >> Could you please kindly suggest me any settings that could balance >> precision and performance for such a small size? >> > > Hi John, > > I've also had issues with small meshes in Gmsh. This is obviously a > completely dumb problem. The absolute length scale of the mesh should have > no bearing on Gmsh's outcome. Anyway, in the past I've just scaled the > problem up so that the grid spacing is ~1. You can then rescale the mesh in > FiPy or rescale the equations. > > > >> Moreover, is there any auto optimisation tool that could help selecting >> the optimum cell sizes? >> > > Don't know the answer to this and I'm not sure what you're asking for. > Does Dave's answer help? > > -- > Daniel Wheeler > > _______________________________________________ > fipy mailing list > [email protected] > http://www.ctcms.nist.gov/fipy > [ NIST internal ONLY: https://email.nist.gov/mailman/listinfo/fipy ] > > -- ..:: ic3man.gr ::.. software | design | development _/_/_/ email: [email protected] _/_/_/ www : http://www.ic3man.gr ------------------------------------------------------------------ This e-mail and any attachments are confidential. You may not copy or disseminate any information contained in them to anyone other than the intended recipient. If you are not the intended recipient please contact the sender by reply e-mail and destroy all copies of the original message immediately. ------------------------------------------------------------------
_______________________________________________ fipy mailing list [email protected] http://www.ctcms.nist.gov/fipy [ NIST internal ONLY: https://email.nist.gov/mailman/listinfo/fipy ]
