Dear professor Bangerth, Thanks for the reply. As I said, I will first try the new implementation myself to see if it works. Provided that it solves my problem correctly, I may create a small testcase that can be added into deal's test suite. Hope I can make some contribution in this regard.
Best Jianan 2017-12-28 11:04 GMT-05:00 Wolfgang Bangerth <[email protected]>: > On 12/28/2017 08:40 AM, Jianan Zhang wrote: > >> >> To illustrate, I tried to solve the problem with Ross's exact solution >> (but with a larger value of omega) on the mesh generated by Gmsh, Then the >> results obtained are obviously wrong. But when I try the same exact >> solution on the mesh created by dealii, the results are correct. This >> demonstrates that dealii of the current version truly has not so good >> support for non-rectangular meshes. >> > > It's not deal.II itself, and it's not about non-rectangular meshes either > -- it's a bug somewhere in the implementation of the Nedelec element. We've > had similar reports over the years before where something goes wrong with > solving on meshes that have non-standard face orientations. But we've never > been able to find exactly where in the ~4,000 lines of code that makes up > the Nedelec element the problem lies :-( > > As Bruno noted, a small testcase is always helpful. I don't think we can > promise that anyone with the skills to find the bug has the time and > inclination to do so (it's a *volunteer* project, after all). But having a > small testcase is always a first step if anyone ever wanted to try to find > the problem. > > Best > W. > > -- > ------------------------------------------------------------------------ > Wolfgang Bangerth email: [email protected] > www: http://www.math.colostate.edu/~bangerth/ > > > -- > The deal.II project is located at http://www.dealii.org/ > For mailing list/forum options, see https://groups.google.com/d/fo > rum/dealii?hl=en > --- You received this message because you are subscribed to a topic in the > Google Groups "deal.II User Group" group. > To unsubscribe from this topic, visit https://groups.google.com/d/to > pic/dealii/ao-bi_Nh7gc/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
