|
[Sponsors] |
![]() |
![]() |
#21 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,901
Rep Power: 144 ![]() ![]() ![]() ![]() |
I think I can see the problem. You have the side walls of the multibody mesh bit set to mesh motion option stationary. It should be set to undefined.
|
|
![]() |
![]() |
![]() |
![]() |
#22 |
New Member
Line Bergmann
Join Date: Sep 2013
Posts: 20
Rep Power: 13 ![]() |
I just tried running with "undefined" It changed nothing. The ball moves back and fourth a little before it crashes just the same way as before.
|
|
![]() |
![]() |
![]() |
![]() |
#23 |
New Member
Line Bergmann
Join Date: Sep 2013
Posts: 20
Rep Power: 13 ![]() |
Also, why does it move back and fourth not just in one direction? I just tried raising the inlet velocity, but only change was the amount of iterations before crashing. I am monitoring the mesh displacement while solving
![]() |
|
![]() |
![]() |
![]() |
![]() |
#24 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,901
Rep Power: 144 ![]() ![]() ![]() ![]() |
If the ball moves back and forth (it was not clear what it was doing versus time in the images) that is a sign of numerical instability. Try smaller time steps. I am not too familiar with the rigid body solver, but look for options which improve rigid body convergence and accuracy.
|
|
![]() |
![]() |
![]() |
![]() |
#25 |
New Member
Line Bergmann
Join Date: Sep 2013
Posts: 20
Rep Power: 13 ![]() |
Thanks for all your help. I am trying to fiddle with the solver controls now. I have a time step of 1e-7, hope I don't have to go lower than that.
|
|
![]() |
![]() |
![]() |
Tags |
moving mesh. |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
[snappyHexMesh] Add Mesh Layers doesnt work on the whole surface | Kryo | OpenFOAM Meshing & Mesh Conversion | 13 | February 17, 2022 08:34 |
Gambit problems | Althea | FLUENT | 22 | January 4, 2017 04:19 |
Moving mesh still crashes in parallel in 1.6-ext | paul b | OpenFOAM Running, Solving & CFD | 36 | February 17, 2014 09:35 |
Question on InterFoam moving mesh capabilities | ziv | OpenFOAM Running, Solving & CFD | 0 | April 23, 2008 10:11 |
Convergence moving mesh | lr103476 | OpenFOAM Running, Solving & CFD | 30 | November 19, 2007 15:09 |