Re: [deal.II] Disordered mesh elements after several refinmnets

2019-05-06 Thread ofcrashbash
Thanks, it helped me. Very small mesh elements are still disordered but oweral solution looks better. Regards, Oleg Kmechak On Tuesday, 30 April 2019 17:38:49 UTC+2, Wolfgang Bangerth wrote: > > On 4/30/19 7:29 AM, Oleg Kmechak wrote: > > PS: In a moment I checked documentation for write_vtk.

Re: [deal.II] Disordered mesh elements after several refinmnets

2019-04-30 Thread Wolfgang Bangerth
On 4/30/19 7:29 AM, Oleg Kmechak wrote: > PS: In a moment I checked documentation for write_vtk. And there is > suggestion to use VTU, so I will try to check also this case. I looked up the VTU format when I wrote the original answer, and it turns out that we only use 32-bit floating point numbe

Re: [deal.II] Disordered mesh elements after several refinmnets

2019-04-30 Thread Oleg Kmechak
PS: In a moment I checked documentation for write_vtk. And there is suggestion to use VTU, so I will try to check also this case. Regards, Oleg On Tue, 30 Apr 2019 at 17:14, Wolfgang Bangerth wrote: > On 4/30/19 9:06 AM, ofcrashb...@gmail.com wrote: > > Yes those "triangles" mesh are what I call

Re: [deal.II] Disordered mesh elements after several refinmnets

2019-04-30 Thread Oleg Kmechak
Yes, it looked like not enough precision of numbers and thats why it quantisizing mesh to grid. I am using VTK and standard workflow from step-6: DataOut data_out; data_out.attach_dof_handler(dof_handler); data_out.add_data_vector(solution, "solution"); data_out.build_patches(); std::ofstream outp

Re: [deal.II] Disordered mesh elements after several refinmnets

2019-04-30 Thread Wolfgang Bangerth
On 4/30/19 9:06 AM, ofcrashb...@gmail.com wrote: > Yes those "triangles" mesh are what I call "disordered mesh". By design, > my mesh generator produces only quadrangular elements(with area nearly > 1e-10), but after few refinments in deal.ii paraview shows those > pictures: one refinment, two.

Re: [deal.II] Disordered mesh elements after several refinmnets

2019-04-30 Thread ofcrashbash
Sorry, if my question(and english language) is not clear enough. Yes those "triangles" mesh are what I call "disordered mesh". By design, my mesh generator produces only quadrangular elements(with area nearly 1e-10), but after few refinments in deal.ii paraview shows those pictures: one refinmen

Re: [deal.II] Disordered mesh elements after several refinmnets

2019-04-26 Thread Wolfgang Bangerth
On 4/26/19 8:35 PM, ofcrashb...@gmail.com wrote: > > I am solving Laplace equation near end of line where field is changing like > sqrt(r), thats why I dense mesh size near tip, and also use adaptive mesh > refinement to make it dense even more. > > But resulted mesh is very disordered(even sim