Wolfgang, Thank you for your time.
>I THINK (please feel free to lecture me) I > > should use the differential equation for B, namely curl(curl(B)) = > omega^2*B, > > but for B the normal components are required to be continuous, so I > should use > > Raviart_Thomas Elements instead of Nedelec and use the Boundary > condition of > > vanishing normal components, i.e. > project_boundary_values_div_conforming(...). > > This can't be correct. The solutions of the curl-curl equation are in > H_curl > and have continuous tangential component but possibly dicontinuous normal > components. You will not be able to impose normal boundary conditions. > > Ok, thank you for that comment, I'd better do some more thinking on that then. > > This is just changing 2 lines in the Code, but gives the error below at > > runtime (The Code is attached. As Error happens quite early in the > > make_grid_and_dofs function and the code is very much tutorial-like, I > hope it > > is readable). > > This is interesting, but independent of the issue above. Can you try to > come > up with as small a program that shows this bug? If so, can you open a bug > report at > https://github.com/dealii/dealii/issues > for it? > Done, this is issue 4092 now. > > > Additional question: is there a possibilty to use 3d-Nedelec Elements on > a 2D > > geometry, or should I use an FE_System with a Nedelec Element and a > FE_Q? In > > this case, It seems I have to reformulate the curl operator, which I'm > not > > overly keen on... > > I'm not sure I understand what you mean by "use 3d-Nedelec elements on a > 2d > geometry". Can you elaborate? > > Can I calculate a 3d-Vector Field that only depends on two spacial Koordinates, in this case (E_x(x,y),E_y(x,y),E_z(x,y))? That, I think, means E is a function E: R^2->R^3. Even more general: in the Documentation about the VectorTools::project_boundary_values_curl_conforming_l2 function, there is something written about a six-component Vektor-Field, combining E and B, in 3d space. I did not find any hints on how to actually write that other than with FE_System. Regards, Felix -- 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 dealii+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
