How can I control write restart file for CFDEM coupling solver

Submitted by ssong on Wed, 09/19/2018 - 07:55

Hi, guys.

There is a problem restarting the liggghts file.

Specifically, I can not restart my simulation about the latest time using the file "DEM/post/restart/liggghts.restartCFDEM" after my computer suddenly turned off.

This is the second case.

First, the restartCFDEM file exists but the file size is 0KB.

The second file exists normally. However, if I execute "parCFDDEMrun.sh", it will not proceed in the step of reading the restart file as below.

-------------------------------------------------------------------------------------------------------------------
...
# read the restart file
read_restart ../DEM/post/restart/liggghts.restartCFDEM_71s
Reading restart file ...
...
orthogonal box = (-0.0805 -0.1205 -0.048) to (0.2405 0.1205 0.16)
2 by 2 by 4 MPI processor grid
-------------------------------------------------------------------------------------------------------------------

So this time, I'm in danger of blowing up the calculation result of about 3 weeks.

I would like to find a way to prevent the restart file from being corrupted if the calculation ends abruptly.

For example, is there a way to create a restart file in the liggghtsCommand file, just like setting the write interval to the controDict file in the CFD solver?

Any help would be appreciated.
Regards,
ssong

Forums:

paul | Wed, 09/19/2018 - 09:24

Why not do it in LIGGGHTS directly? Check out the restart command - not using it when running "expensive" calculations is somewhat negligent!

writeLiggghts in liggghtsCommands does write the LIGGGHTS restart file every time the CFD writes.

I do not know what happened, since the circumstances are not reproducible.

ssong | Sun, 09/23/2018 - 15:51

I saw your comment now. and I will check the command in more detail.

Thank you, paul!

ssong.