LIGGGHTS® - User Forum

Hello Everyone
For Setting the value of the coefficient of friction using the same material, will the coefficient of friction will vary for different sizes of mono particles, binary and multicomponent mixtures in case of a hopper flow?

Thanks in advance.

Hello,
I am trying to understand the use of comand fix deform and triclinic box to generate a simulation like boundry less(less edwards condition).

I got the following error.

Hello LIGGGHTS users.

I have to apply Less Edwards Boundary Condition in one off my simulation.

Right now I got a script from LIGGGHTS packing example.

I tried to modified it.

My script looks like this

```
#Particle packing by insertion and successive growing of particles

atom_style granular
atom_modify map array
boundary m m m
newton off
#echo both
communicate single vel yes
units si
#box tilt small

Hello,

Hi Guys

If one has a vibrating screen deck, is it possible to assign multiple types of motion to the deck?
For example rotation and translational motion. The data for the accelerations and displacements will be calculated by means of differential equations, thus these will be used as input data.

Kind regards
Mishal Mohanlal

Hi Folks,
I am trying to delete the atoms after they reach a certain point, is there any kind of compute available for that? I am just using 1 type of particles for my simulation. I want them to be removed and not be tracked anymore.

Hello,

I am trying to do simulation with two different particles at once.
So my first simulation will include particles differe in their cofficient of restitution,

This is my script
```
#Simple chute wear test

I used the 'fix multisphere/break' feature for a simple direct shear simulation on clusters. After breakage occurs, I would soon receive error message telling me that there is problem with MPI all_reduce. The simulation went well when I used 'fix multisphere' instead. I don't have any idea what went wrong with it.

As we know, the following code can get the component of the contact force:

compute 1 all pair/gran/local force

but, how to get the magnitude of the contact force?

Thank you for your help.

Hi everyone,
I hope you are all well.
I have a question about Liggghts ability to fix the particles in their position but update their velocities. We know liggghts has the following command:
fix 3 wall nve/noforce
which does the opposite thing I need, changing particles position but fixing their velocity. I need to keep the particles in their initial position, but update their velocities based on forces. Now I am using the following command:
fix integr all nve/sphere