CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

2D floating object in overInterDyMFoam...

Register Blogs Members List Search Today's Posts Mark Forums Read

Like Tree1Likes
  • 1 Post By RicardoLB

LinkBack Thread Tools Search this Thread Display Modes
Old   March 5, 2019, 09:41
Default 2D floating object in overInterDyMFoam...
New Member
Ricardo Lopez
Join Date: Oct 2013
Posts: 19
Rep Power: 12
RicardoLB is on a distinguished road
Hello everyone!
I am starting to work with overset meshes and taken the floatingObject tutorial as a starting point. I want to get a 2D floating object setup to carry out simple heave decay tests (and eventually to add wave generation and absorption boundary conditions). I have a half-working setup ready.

I am getting this error repeatedly:
Cell:2115 at0.42125 0 0.254285714286) zone:0 changed from hole to calculated but there is no donor
This happens in a cell which is in the last and second to last timesteps a hole... I attach an image. Can anybody give me hints on how to solve this problem?

I also observe some apparently strange movements of the floating object as if it where excited (I don't explain myself the initial acceleration from the initial position of non-equilibrium between the waterline and the submerged volume and the following steps). I think I have assigned the correct mesh groups and boundary conditions; are they correct?

I attach the case folder.

Attached Images
File Type: jpg Position_cell.jpg (192.6 KB, 78 views)
Attached Files
File Type: gz floatingBody2D.tar.gz (6.1 KB, 25 views)
Jim1310 likes this.
RicardoLB is offline   Reply With Quote

Old   August 15, 2019, 19:28
New Member
Romain Ping
Join Date: Feb 2019
Posts: 3
Rep Power: 7
romainping is on a distinguished road
Hi Ricardo,

I am facing the same error message on OF 1812. I do not have this error on version 1712...
Have you found a solution ?
Thanks for your help,

romainping is offline   Reply With Quote

Old   December 22, 2023, 06:41
Lightbulb Solution
New Member
Dimitris Tsoumpelis
Join Date: Sep 2022
Location: Athens, Greece
Posts: 5
Rep Power: 3
Jim1310 is on a distinguished road
This is a case that particularly interests me, so i searched what the pitfall had been. Eventually it must be the fact that although there should be motion only in the plane, for some reason (probably due to arithmetic error) there is some parasitic movement-rotation outside of the plane. It can be seen in the log-file of the solver that initially there is an off-plane rotation of about ~10^(-30), which is gradually build up until ~10^(-6) where the simulation cruses. This can be easily solved by imposing movement constraints (see wiki-page: I imposed a plane constraint (movement only on the z-x plane) and an axis constraint (rotation only in y-axis) and it worked without a problem (my Of version: v2106).
Attached Files
File Type: gz floatingBody2D_o.tar.gz (6.4 KB, 4 views)
Jim1310 is offline   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
engineFoam with layers - pressure problems when adding layers mturcios777 OpenFOAM Running, Solving & CFD 23 January 4, 2023 21:56
error in fireFoam, when running the case wallFireSpread2D zhoubiao1088 OpenFOAM Running, Solving & CFD 9 February 1, 2018 18:45
[] Error compiling OpenFOAM-1.6-ext Canesin OpenFOAM Installation 137 January 20, 2016 14:56
Compilation error OF1.5-dev on Suse10.3 darenyang OpenFOAM Installation 0 April 29, 2009 04:55
[blockMesh] BlockMeshmergePatchPairs hjasak OpenFOAM Meshing & Mesh Conversion 11 August 15, 2008 07:36

All times are GMT -4. The time now is 18:54.