The fix deform command ends with a wrong simulation box size

LAMMPS LAMMPS Development
1

I apply a scaling on y and z dimensions with fix deform command.

fix 1 all deform 1 x scale 1 y scale 0.256 z scale 0.256

My initial box dimension is : 195 * 337.45 * 536.35 and
I end up with 195 * 40 * 25
instead of : 1951 * 337.450.256 * 536.35*0.256 = 195 * 86.3 * 137

Where does the problem come from?
I add to this question the input file and log.lammps file.

a-relaxation.lammps (3.8 KB)
log.lammps (512.4 KB)

2

Without looking any closer, I can see that your “start” option to the run command is wrong. It should have the value of 0 throughout.
Please see the “run” command documentation for more details.

1 Like
3

That solved the problem, thank you very much for your fast reply.