LIGGGHTS® - User Forum

Hi,

In my simulation, first I tried to add particles in the hopper < settle the particles< close the hopper with with a lid. While fixing lid I get an error :

ERROR: Fix wall/gran (id wall2): Unknown argument or wrong keyword order: 'wall' (../fix_wall_gran_base.h:131)

I am attaching my in.file below

Is it possible to fix wall twice?

Good afternoon
I would like to know which is the difference between running LIGGGHTS with lmp_auto and lmp_openmpi.

Thanks

Dear all,

I am facing a problem about atoms passing through the stl meshes. In my originial code, I set the young's module of particles to be 5e6 Pa and that of mesh walls to be 1e9 Pa, everything goes well in this code. However, when I want to simulate a harder particles with Young's module being 7e7 Pa, the particles will passing through the mesh wall when I exert confining pressure on the particles. I guess it is because the particles is too hard and the mesh wall cannot stand this, so I change the Young's module of walls to be 1e11 Pa, while the result is similar.

Hello y'all,

I'm running several LIGGGHTS simulations inside a for-loop in a Bash script. After every simulation a write a restart file, which is read in the beginning of the next one. The only difference is that I change the file which is read in a variable as an atomfile:

variable heatSourceIn atomfile post/atom_file/whatever.atomfile

After about ~50 perfect iterations, I suddenly got the error:
ERROR: Atomfile variable could not read values (../variable.cpp:375)

Hello all,

due to the fact that I am running a simulation within a while loop and create realtime to several days, the logfile grows up and needs a lot of space.
Is there a possiblity to turn off the logfile creation? I already tried the command echo none but it will not work.

Regards,
Westbrink

Hello,

I would like to add the lubrication forces without the cohesion forces. do you think that in order to to this I could simply switch the surface tension to 0?

best regards

Hi,

While installing LIGGGHTS on HPC error comes up saying
Unable to locate shared libraries libvtk commomcore.so....... # loaded only openmpi module

I doubt this is because of missing libraries like paraview-openmpi paraview-openmpi-devel
The person who is installing has asked me to send the links for these libraries.
I am unable to find the packages. Can you help me in this regard?

Regards,
Shiva.

Dear all,

Hi everyone,

I am trying to to install the python interface to LIGGGHTS and it does not work when I use the auto makefile.

I have three computers with LIGGGHTS installed. For tow of them I modified and used the ubuntuVTK6 makefile and compiled LIGGGHTS as normal. It worked, so I then compiled LIGGGHTS as shared libraries following the instructions and it worked as well.

In the third computer I used the auto makefile for the normal compilation, and it worked. However as I tried to compile LIGGGHTS as a shared library, it does not work.

hi,

Recently I got access to HPC which runs on REDHAT
I have an executable file lmp_auto, loaded to my login node using sftp.
From the available modules I loaded openmpi-1.6.4,fftw & hdf5 libraries and submitted the job.
Below is the script file

#! /bin/csh
#PBS -l walltime=01:00:00
#PBS -N hopper
#PBS -q workq
#PBS -l select=4:ncpus=16:mpiprocs=16
#PBS -l place=scatter:excl
#PBS -V

# Go to the directory from which you submitted the job

cd /scratch/shiva/hpc1

module load openmpi-1.6.4