LIGGGHTS® - User Forum

I am new to LIGGGHTS software. Does surface mesh size effect the particle flow simulation?? I am doing the simulation for particle flow inside the screw feeder where only surface mesh i generated. what about the volume mesh and how the calculations are occurring??? also please explain the role of neighbor listing.
Thanks in advance

This is my LIGGGHTS file.

units si
atom_style sphere
boundary ff ff ff
newton off
processors 1 1 3
communicate single vel yes

Is there a way to add a force and a variable velocity to a group of rigid grains?

Hi everyone,

is there a general guideline on how often to compute and print out thermo dynamic info? For example, how do I decide whether I should use thermo 1000 or thermo 2000?
I'm thinking of something similar to 0.1 ... 0.2 x Rayleigh Time for timesteps.

Thank you for your help,
Michael

I met some problems when making LIGGGHTS on my mac. I tried to change the MAKEFILE.USER in src/MAKE but every time when I type "make auto" in the terminal, error occurs like this:

Makefile:940: *** 'Could not determine suitable appendix of VTK library with VTK_INC="-I/usr/local/liggghts/vtk/include", VTK_LIB="" and VTK_APPENDIX="-VTK_MAJOR_VERSION.VTK_MINOR_VERSION"'. Stop.
make: *** [auto] Error 2

Hello
I am anew user of liggghts . I am trying to rune a code I am getting the following error

0 atoms in group nve_group

ERROR on proc 0: Too many neighbor bins (../neighbor.cpp:1776)

Hello to everybody,
since I have developed particular interest in the subject of Cohesive energy density and the appropriate values for this parameter, I would like to ask if anybody could share some papers, experience, anything that could help about Ced.
Thanks,
greetings.
DDG

hello everyone,

I am using CFDE to simulate the combustion process of particles. I wish the particlesl shrink after heating to 350 degrees and disappear after the radius is less than 0.003. I used two ways to solve the problem, but both got ERRORS.

1.way

Hello,

hi all,

I want to study the particles segregation in blender for which I need the initial state of particles to be completely mixed/random.
Does the fix style "particledistribution/discrete" create completely mixed state of particles or is there any other command?
Please let me know your suggestions.

Thanks,
Shiva.

Hi Everyone,

I have been trying to figure out this problem for a while now and I have not been able to find the solution.

What I have:
Particles impacting on a wall.

What I need:
The average forces acting at the nodes of the mesh for a certain number of timesteps.
Alternatively the stress acting on the elements of the mesh for those timesteps.

What I have achieved:
To print the stresses for the full mesh in a txt file.