Search found 4801 matches

by raback
Yesterday, 14:34
Forum: ElmerSolver
Topic: Unable to open .vtu file after Electrostatics tutorial
Replies: 6
Views: 37

Re: Unable to open .vtu file after Electrostatics tutorial

Hi No, the bug seems to have rolled to me also today. I locally work on a Ubuntu22 virtual machine and there last update in /var/log/apt/history.log is: Start-Date: 2024-03-18 10:16:54 Commandline: /usr/bin/unattended-upgrade Upgrade: libexpat1:amd64 (2.4.7-1ubuntu0.2, 2.4.7-1ubuntu0.3), libexpat1-d...
by raback
Yesterday, 13:30
Forum: General
Topic: Acoustic waves propagation in a solid body
Replies: 4
Views: 30

Re: Acoustic waves propagation in a solid body

Hi,

These are very different wave lengths. Acoustic ultrasonic ~1.0e-2 m and X rays 1e-9 m. So you can indeed study some realistic specimen with acoustic waves but with x rays not. Even if you had a small enough specimen you should consider then the molecular stucture as well.

-Peter
by raback
Yesterday, 13:22
Forum: ElmerSolver
Topic: Unable to open .vtu file after Electrostatics tutorial
Replies: 6
Views: 37

Re: Unable to open .vtu file after Electrostatics tutorial

Hi This is strange. Nothing has changed in this fore ages. My colleague also had also similar issues with Paraview on Friday. Looks alot like this thread: https://discourse.paraview.org/t/i-cannot-read-a-vtp-file-i-could-open-yesterday-can-someone-try-to-open-it/13938/20 In fact, it does not open fo...
by raback
15 Mar 2024, 09:43
Forum: General
Topic: export stiffness matrix without starting simulation
Replies: 3
Views: 37

Re: export stiffness matrix without starting simulation

Hi, If the solver is never executed there will unfortunately be no stiffness matrix. You could however, try this keyword in Solver section: Linear System Solver Disabled = Logical True There might be other ways, like setting linear system iterations to zero etc. but this one should be clean. Codewis...
by raback
14 Mar 2024, 13:14
Forum: External tools
Topic: Problem reading in netcdf file at higher resolution
Replies: 4
Views: 55

Re: Problem reading in netcdf file at higher resolution

Hi I added a few days ago some more output (with high "max output level") so you might get a better idea now what is going on. Generally memory issues may be difficult and if it happens in netcdf library it is hard to tell. In Elmer it is a good idea to always use and check the optional ST...
by raback
13 Mar 2024, 15:17
Forum: ElmerSolver
Topic: VectorHelmholtzSolver and 2nd Order Elements
Replies: 2
Views: 76

Re: VectorHelmholtzSolver and 2nd Order Elements

Hi

Elmer has 2nd order edge elements (Nedelec's 1st kind) invoked by "quadratic approximation = true".

-Peter
by raback
12 Mar 2024, 01:43
Forum: ElmerSolver
Topic: Elmer-elmag example throws error
Replies: 21
Views: 310

Re: Elmer-elmag example throws error

Hi, can you solve anything with success? CUDA does not like DLL so that could be the culprint. However, in that case you should not be able to run most cases. There is something fishy since the code should be looking for "ProcName_bulk" and not just "_bulk". What is you setup and...
by raback
08 Mar 2024, 14:21
Forum: ElmerSolver
Topic: impulse boundaries conditions
Replies: 7
Views: 84

Re: impulse boundaries conditions

Maybe look at test case "ElasticBeamHinged3D". -Peter
by raback
08 Mar 2024, 13:26
Forum: ElmerSolver
Topic: impulse boundaries conditions
Replies: 7
Views: 84

Re: impulse boundaries conditions

Hi I think forces are always in cartesian directions. What the code does is it assembles the equations in cartesian coordinates. Then it rotates the entries when glueing them into the global matrix. The Dirichlet BCs are then set in this global matrix and hence there the "normal-tangential disp...
by raback
07 Mar 2024, 14:42
Forum: External tools
Topic: Problem reading in netcdf file at higher resolution
Replies: 4
Views: 55

Re: Problem reading in netcdf file at higher resolution

Hi

What line causes the segfault? Is it netcdf reader or Elmer side? If you increase verbosity to 30 what is the last line Elmer writes on std out?

-Peter