Restart files

Submitted by SHUBHAM AGARWAL on Fri, 12/04/2020 - 22:51

Hello
I am relatively new to LIGGGHTS-Flexible fiber version. I was going through the tutorials about using the restart files.
I some tutorial folders I found: main LIGGGHTS file, read_restart and write_restart files.
Can you please let me know (or direct me to a place where I can learn) about the meaning and how to use these different kinds of restart files.

Thank you very much

Shubham

Forums:

mschramm | Sat, 12/05/2020 - 20:56

Hello,
What are you referring to when you state restart files?

The shear cell and uniaxial compression tutorials utilize restart files.
Each of these tutorials have three files in which the first file (insert/write_restart) inserts the flexible fibers utilizing a single thread. This writes the first restart file with a 0.
Next we settle the system (settle/read). To do this we read in the previous restart file but we utilize a wildcard character. This wildcard character will allow LIGGGHTS to
choose the restart file with the highest number. So we read in the restart file as read_restart restart*. This will look for all restart files (say restart0 and restart1) and
choose the one with the highest number.
After settling, we write a restart file to be used for the actual test.

To learn how to use restart files please see the following.
https://www.cfdem.com/media/DEM/docu/restart.html
https://www.cfdem.com/media/DEM/docu/write_restart.html
https://www.cfdem.com/media/DEM/docu/read_restart.html