LIGGGHTS® - User Forum

Hello,

I would like to track the time evolution of the number of clusters and the number of particles in each cluster during an impact simulation.

As a first step I use :

compute cluscoord all cluster/atom ${diam}

in order to identify the clusterID for each particle. However, I am wondering what would be the easiest way to count the number of clusters and the number of particles in each cluster.

Thanks in advance,

Hello, everyone,

I want to simulate contiuous materials, so I downloaded the package from https://github.com/richti83/LIGGGHTS-WITH-BONDS and copied it into the source file. When I compiled the package (type "make yes-bondspackage" in src), it said "bondspackage do not exist". Could anybody help me with that please? Could anybody tell me what correct steps are from downloding the package to running it successfully in 3.8? I really appreciate it.

Hi everyone

How to calculate the degree of saturation in gran cohesion easo/capillary/viscous model?
[Degree of saturation= a ratio of liquid to the total volume of voids in a porous material (soil) ]

thanks a lot and best regards
saman

Hi All,

I am dealing with an error I hadn't seen before and it seems to be unlisted.

My simulation consists in a 20cm long tube and 3cm diameter, at the moment I have a single particle running along the tube with periodic boundary. I used GMSH to create the geometry and mesh of the tube.

The simulation itself is simple, simple geometry, simple distribution, simple output. I run the simulation in serial first and I did not know what the problem was. Then I run it in parallel and I obtained a little bit more of information:

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LIGGGHTS (Version LIGGGHTS-PUBLIC 3.8.0, compiled 2019-01-23-05:33:02 by root, git commit unknown)

atom_style superquadric
ERROR: Invalid atom style (/build/liggghts-hYaheD/liggghts-3.8.0+repack1/src/atom.cpp:459)

I made the necessary changes in make file but still i m getting the issue. please suggest something.

Thanks in advance.

Hello,

Anyone know how to run simuation in parallel computing with workstation?

Its tried mpirun -np 128

but its showing node: imk****
Executable : LIGGGHTS

Your help is much needed.

Thank you

Hello Everyone,

I am trying to re-compile LIGGGHTS-PUBLIC after applying some modifications to cohesion_model_sjkr equation but I am getting following error:

Hello Community,

I'm working with liggghts for a job at my university. This work examines the contact surface between particles and the wall.

I have created a particledistribution with 4 different atom types and would now like to determine the tensions between the wall and the individual atom types.

For this I tried to combine a dump-stress command with a group assignment, but unfortunately this doesn't work.

dump dmpAllMesht1 t1 mesh/vtk 10000 post_hertz_ver/t1/t1_stress*.vtk stress window

I used the following command in OpenFOAM to get the stl file.
surfaceMeshTriangulate -patches '(walls patch2 patch3)' walls_new.stl