CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > CONVERGE

Converge stops simulation, but no .error file

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 18, 2023, 04:40
Default Converge stops simulation, but no .error file
  #1
New Member
 
Join Date: Dec 2023
Posts: 8
Rep Power: 2
Laurens is on a distinguished road
Hi all,

I'm running a single cylinder engine case in Converge with spark ignition, but I am running into some problems. I ran a simulation with a certain spark timing, and I'm now trying to run a simulation with a later spark timing. This time the simulation stopped 53 CADaTDC (~60CADaSpark) in the third cycle (2213 CAD). The simulation is supposed to run until 2548 CAD. Converge does not write anything into the .error file and the slurm-#.out does not display any odd information either. In converge.log (verbose) I can not find anything either. When I check some values like cell count, pressures, temperatures and dt(sec), nothing stands out other than the differences I expect from different spark timing. Does anyone have any tips where to look for the cause of the stopped/crashed simulation?
General info:
-I run the simulation on a high performance cluster.
-I make the case in v3.1 and export to v3.0 to run it on v3.0 on the cluster
-The combustion model used is SAGE
-Turbulence model is RANS RNG k-eps
Thanks in advance!
Laurens is offline   Reply With Quote

Old   December 19, 2023, 12:10
Default
  #2
New Member
 
Join Date: Nov 2023
Posts: 23
Rep Power: 2
bb91936762 is on a distinguished road
Hey Lauren,


This is Basu Parmar from CONVERGE support. The errors in v3.0, should appear in "err.JobID" file. I cannot exactly comment on what happened. Do you have a restart file close to or where it crashed? If so try making a logfile of the simulation run. It will be something like:

mpirun converge-mpich &> logfile.out (use the mpi statement based on the version you are using)


This may show you the error. Please let me know if you still cannot diagnose it.

Thanks,
Basu
__________________
________________


Basu Parmar
Research Engineer - Applications
Convergent Science
bb91936762 is offline   Reply With Quote

Old   December 20, 2023, 10:12
Default
  #3
New Member
 
Join Date: Dec 2023
Posts: 8
Rep Power: 2
Laurens is on a distinguished road
Hi Basu,

Thank you for responding.
Maybe I shouldve been clearer in my first statement. The error file is made, but does not contain information (0 bytes), in my opinion this meant that the simulation did not crash according to converge, but it did stop somehow! The converge.log is full of information, but not any info that points out to me that something is going wrong.

I restarted the simulation and it continued till completion with no weird phenomena in any graphs or values that I post-processed.

Friendly regards,
Laurens
Laurens is offline   Reply With Quote

Old   December 20, 2023, 15:52
Default
  #4
New Member
 
Join Date: Nov 2023
Posts: 23
Rep Power: 2
bb91936762 is on a distinguished road
Hey Laurens,


Since you mentioned you restarted the simulation with the exact same setup, same no of cores and mpi and it continued till completion the errors may not be with CONVERGE. There can be many other reasons for this, including problems with the cluster, out of run time etc. Let us know if this happens again.

Thanks,
__________________
________________


Basu Parmar
Research Engineer - Applications
Convergent Science
bb91936762 is offline   Reply With Quote

Reply

Tags
converge, crash, engine, spark

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
Question on Laser Ignition Simulation by Converge Studio jalalsani CONVERGE 1 October 23, 2020 10:39
pimpleCentralFoam simulation stops without error message Seb_Ve OpenFOAM Running, Solving & CFD 5 November 6, 2018 07:17
Access error while solving stops simulation SMagee FLUENT 4 May 2, 2017 10:58
cannot converge a pimpleFoam simulation iper88 OpenFOAM Running, Solving & CFD 1 November 26, 2015 08:04
Simulation seems to converge but crashes suddenly xxxx OpenFOAM 16 September 12, 2014 08:07


All times are GMT -4. The time now is 16:08.