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IDProjectCategoryView StatusLast Update
0002530OpenFOAMBugpublic2017-10-27 17:05
Reporterpilschka Assigned Tohenry  
PrioritynormalSeveritycrashReproducibilitysometimes
Status closedResolutionfixed 
PlatformGNU/LinuxOSDebianOS Version8
Summary0002530: floating point exception due to high negative Min(alpha.water) in compressibleInterDyMFoam after restart from latestTime
DescriptionI've got 2D case where a heated paddle is oscillating.
When I start from 0 folder everything works fine. E.g. when endTime = 1 the simulation stops at 1s.
But if I want to start at 1s the simulation crashes with floating point exception error at the first calculation step.
In the log file very high values for Min(alpha.water) and Min(alpha.air) occur.
Write in binary format or lower the CFL number doesn't work.
start with mesh motion (compressibleInterFoam) does work.

In the Attached Example the writing interval is set to 0.02 and stops at 0.04.
So one can see that restarting at 0.02 is possible but at 0.04 it isn't.
The mesh might be bigger as a usual test case. sorry for that, but I couldn't
reproduce the error with smaller meshes. Or when only using blockMesh the following error occurred.
(https://www.cfd-online.com/Forums/openfoam-solving/182819-error-caused-unexpected-mesh-displacement-openfoam.html)

 

sketch of the geometry:
______________
| |
| <--> |
| || | y^
| || air | | /z
| || | | /
| || | |/
|.....||.....| |-------> x
| || |
| || |
| || |
| water|
|____________|
Steps To Reproduce- open case folder
- decompose 0 folder
- start compressibleInterDyMFoam (takes about 15 min with 2 cpu's)
- reconstruct all time folders
- try to start from latest time folder (0.04) ---> should crash
- rename 0.04 folder and start from 0.02
- start from latestTime (0.02) ---> should work
TagsNo tags attached.

Activities

pilschka

2017-04-20 13:24

reporter  

henry

2017-10-27 17:05

manager   ~0008947

User-support request.

Issue History

Date Modified Username Field Change
2017-04-20 13:24 pilschka New Issue
2017-04-20 13:24 pilschka File Added: Bug_report_restart_CompressibleInterDyMFoam.tar.gz
2017-04-20 13:42 henry Priority high => normal
2017-10-27 17:05 henry Assigned To => henry
2017-10-27 17:05 henry Status new => closed
2017-10-27 17:05 henry Resolution open => fixed
2017-10-27 17:05 henry Note Added: 0008947