RE: [deal.II] Questions on Step-18

Hi Jean-Paul,Thank you for the nice explanation and information! It cleared out my concern and helped me understand the related concepts of vorticity and rotation. Vorticity (1/2 curl of velocity) stands for the rotation rate (angular velocity) but the infinitesimal rotation tensor gives the

Re: [deal.II] Questions on Step-18

Hi Michael, What’s written in the implementation suggests that computing the curl of the displacement (increments) is the right thing to do in this instance: > Nevertheless, if the material was prestressed in a certain direction, then > this direction will be rotated along with the material.

Re: [deal.II] step-17: MPI parallelisation doesn't run (macOS Catalina)

Hi Bob, I think that for anyone to be able to try to help diagnose the source of this problem, they’d have to know the specifics about the way that you’ve installed deal.II. Are you using the Mac package, or have you built deal.II from source? If the latter, then can you please provide us with

Re: [deal.II] Re: writing values in the solution vector for constrained dofs

Hi Bruno, everything worked as expected, so constraints.distribute() does what it should do :-) Best Simon Am Mi., 23. Juni 2021 um 23:28 Uhr schrieb Bruno Turcksin < bruno.turck...@gmail.com>: > Simon, > > Yes, you should be able to skip the constrained hanging nodes. Like you > said the

Re: [deal.II] Questions on Step-18

I would be happy to do the comparison and make the fix. But before doing that, I want to make sure I understand the formula correctly. When we calculate the rotation matrix, it seems that the *du* (incremental displacement) is used. // Then initialize the FEValues object on the present

[deal.II] step-17: MPI parallelisation doesn't run (macOS Catalina)

Hi everyone, I'm learning how to parallelise dealii programs with MPI, and I've started with tutorial number 17. I have a macOS Catalina, 10.15.7 and if I query the version to the command line > mpirun -version > mpirun (Open MPI) 4.1.1 I can compile with > make and after I get the

Re: [deal.II] Questions on Step-18

Following Andrew’s explanation, I suppose that this is relation for which we’re lacking the factor of 1/2, right? https://en.wikipedia.org/wiki/Angular_velocity#Angular_velocity_as_a_vector_field If so, then