[deal.II] How to access Dof values of solution vector according to their geometric location?

2024-03-25 Thread Tim hyvärinen
Hi, deal.ii developers and users Recently, I get this question as been mentioned in subject. I have a saddle point problem on hand. The system of vector-valued PDEs is non-linear. I implement the solver with Newton iteration without line search. And I also need to set up a specific initial

Re: [deal.II] How to access Dof values of solution vector according to their geometric location?

2024-03-25 Thread Wolfgang Bangerth
On 3/25/24 09:13, Tim hyvärinen wrote: Let's say we have a 3-components vector-valued unknown. Geometry domain is  2 * 2 * 2 size cube.  I want to set Dofs, which are inside ball x^2+y^2+z^2=1,  to be  (1, 1, 1) at every vertex. While the rest of Dofs of the cube to be (1,0,0) at very

[deal.II] deal.II Newsletter #278

2024-03-25 Thread 'Rene Gassmoeller' via deal.II User Group
Hello everyone! This is deal.II newsletter #278. It automatically reports recently merged features and discussions about the deal.II finite element library. ## Below you find a list of recently proposed or merged features: #16781: Add local_range() and in_local_range() to