Re: [deal.II] Re: Defining tensor in different dim and spacedim

2016-10-20 Thread Wolfgang Bangerth
On 10/19/2016 08:42 PM, benhour.amiria...@gmail.com wrote: I still have some problem in solving my equations on a curved domain (sphere in 3D or circle in 2D). I got error with this content: invalid initialization of reference of type ‘dealii::Triangulation<2, 3>&’ from expression of type ‘dealii

Re: [deal.II] Re: How to use Trilinos instead of Petsc in step-40

2016-10-20 Thread Wolfgang Bangerth
On 10/19/2016 05:55 PM, Hamed Babaei wrote: Although the problem has been resolved by this trick but I don't know why I need to consider different convergence criteria for CG solver in the first newton iteration. What is the norm of the first right hand side? You now set the tolerance in the f

[deal.II] How to apply boundary values for a particular point on the boundary instead of the whole boundary surface

2016-10-20 Thread Hamed Babaei
Hi friends, For an elastic problem, I am going to apply zero boundary displacements for three specific points on the center of -x, -y and -z planes of a cubic domain. I have already done this but for the boundary surface not a boundary point (the same as incremental_boundary_displacement in ste

[deal.II] Development history of deal.II

2016-10-20 Thread Wolfgang Bangerth
All, a colleague of mine showed me a neat way to visualize the development history of a code this week. I had to apply this to deal.II, of course, and the result of applying it to the git repository is here: https://www.youtube.com/watch?v=xEQoBLVDhY4 The video neatly shows how the sub-dir

Re: [deal.II] Some questions on Nonlinear Problems

2016-10-20 Thread Wolfgang Bangerth
On 10/20/2016 02:55 PM, JAEKWANG KIM wrote: Hi, all. I got a question on the symmetry of system matrices. I am looking for ways to solve Non-linear PDE using deal.ii and Dr. Bangerth's video lecture from 31.5~31.7 is greatly helpful to understand basic of this part. In many elementary codes in

[deal.II] Some questions on Nonlinear Problems

2016-10-20 Thread JAEKWANG KIM
Hi, all. I got a question on the symmetry of system matrices. I am looking for ways to solve Non-linear PDE using deal.ii and Dr. Bangerth's video lecture from 31.5~31.7 is greatly helpful to understand basic of this part. In many elementary codes in tutorial lists, we have used Conjugate G

[deal.II] question on contact algorithm for step-41

2016-10-20 Thread Hoang Giang Bui
Hello I have some doubts over the contact algorithm used in step-41. Maybe someone can help me to clarify: + In step-41, instead of solving for delta_U and delta_Lambda, we solve for U_k+1 by using a finite difference equation. Is it some form of explicit contact algorithm? It is also worth not