LIGGGHTS® - User Forum

Hello, I am using LIGGGHTS-WITH-BONDS and I would like to set my bond cutoff length as
cutoff = (R1 + R2) + G*(R1 + R2)
where R1 and R2 are the radii of the two particles and G is a value defined by me. How can I implement this into the line
fix bondcr all bond/create/gran 1 1 1 cutoff 1 26

Hello,

I am running the following code and facing some problem.

-------------------------------------------------------------------------------------------------------------------------------
#Simple chute wear test

atom_style granular
atom_modify map array
boundary m m m
newton off

communicate single vel yes

units si

region domain block -0.5 0.5 -0.5 0.5 -0.5 0.5 units box
create_box 1 domain

neighbor 0.2 bin
neigh_modify delay 0

Hello,

I am facing the following problem when trying to run the Ligghts.

Hello. when I am trying to install LIGGGHTS, I am facing the following problem. Can anyone point out that what is going on?

Hello,
I am a new user to both Ubuntu and LIGGGHTS. I am using ubuntu 20.04. I am facing the following problem during the installation. May I know where is the problem going on?

Hello community,

I am working on my Master Thesis in the form of a continuous mixer, I am currently in the process of determining the parameters inside the cylinder and it is set as a residence time of particles in the simulation domain as one of the main factors.

According to the documentation, such an approach has already been given as a ready-made function:
https://www.cfdem.com/media/DEM/docu/fix_property_atom_region_tracer_tim...

Hi Guys

Is there anyway to attained material loading on the walls of a silo during flow?

I know this can be calculated analytically, however is it possible to perform this using LIGGGHTS?

Kind regards

I see that several people in the forum has experienced particles penetrating through the wall, but has anyone experienced a case in which particles do/don't penetrate the wall depending on the computational domain size?

Hello everyone!

I'm working on a simulation and I could really use some help. I want to simulate the flow of granular material in the space between two concentric cylinders. The inner cylinder is rotating and therefore causes the material to move. It's something like a rheometer but with granules instead of fluid.

I am trying to simulate the superquadric particles but after few time steps the code stops and a following error pops up.
ERROR on proc 0: Using default surface model for non-spherical particles! (../surface_model_default.h:144)

the model I am using is pair_style gran model hertz tangential history surface superquadric.

Does anyone have the same problem or knows the cause of the error?