LIGGGHTS® - User Forum

Hello,

I am using LIGGGHTS to simulate heat transfer in a packed bed of particles. I decided to calculate the contact area with the overlap and with the area correction given by adding the original Young Modulus. This is feasible for the contact particle-particle.

Hi everyone,

I am solving a problem to predict the flow behavior of particles in screw feeder. The output of the code provide these values.

dump dmp all custom 1000 dump.screw id type type x y z vx vy vz fx fy fz omegax omegay omegaz radius.

In this what exactly is fx fy and fz ?? and if I want to compute the forces and torque in tangential and normal direction , how will i compute??

Hi everyone

How can the capillary force be extracted from the easo model for to get the output? (I didn't find anything in the search forums)

Please anyone can help me.

Thanks a lot

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,

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:

<>

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.