LIGGGHTS® - User Forum

Hi I have installed mpich2 with process outlined below. LIGGGHTS in installed by following the process outlined in https://github.com/CFDEMproject/LIGGGHTS-PUBLIC/wiki/Installing-LIGGGHTS...

Hi, everyone here.
i have several quite basic questions:

I have installed LIGGGHTS in windows with the procedure outlined in https://github.com/CFDEMproject/LIGGGHTS-PUBLIC/wiki/Installing-LIGGGHTS.... LIGGGHTS is working properly.

Hi everyone

I am implementing the great model / hertz / history / stiffness in LIGGGHTS 3.0.0, the code is as follows:

units si
atom_style sphere
atom_modify map array
boundary m f m
newton off
communicate single vel yes
processors 2 2 2

region reg block -2.7 2.7 -0.1 1.1 -2.7 2.7 units box
create_box 1 reg

neighbor 0.001 bin
neigh_modify delay 0

#Material properties required for new pair styles

Hi

I get a buffer overflow error when the LIGGGHTS input script tries to import .stl files. I have LIGGGHTS 3.0.1 installed on my computer and what it is strange is that the same mesh file is working fine in another computer which has LIGGGHTS 2.3.8 installed. I am not sure what I am doing wrong. Any ideas on why this is happening and how I can proceed?

Here is the complete error message:

Hello, I am trying to simulate a tribo-electric separator with a spatial dependent electric filed. For which I have written all desired variables in the in.script. However, while running it ends-up at:

Step Atoms KinEng 1 Volume
0 0 -0 0 1.4486977
ERROR: Invalid syntax in variable formula (variable.cpp:1385)

The scripd other stl files are attached with the post....

Plz, if anyone can tell whats wrong in my script.

It is noted that LIGGGHTS has the capability to model the irregular-shape particle by using multi-sphere treatment? Is the multi-sphere code available in the public domain? How to use the function? Appreciate for any help.

Dear community,
I was wondering if it's possible to tell LIGGGHTS to read from an external file that containes coordinates (x,y,z) and velocity components (vx,vy,vz),
so that the particles will experience a force (with "fix add force") that will be dependent on their coordinates. For example, if my particle is located
at (x1, y1, z1) at time t1, LIGGGHTS will check the file for the closest coordinate and the corresponding velocity to act on the particle ?

Hi everybody,
my question is about the model finnie wear. For example, shown in the tutorials referenced wear and my question is about the unit in which it is said wear.
In JPEG, wear range 500, 400, 200, 0 ... what would be the unit?

Best Regards,

Cristian.

Hi, there

After running the conveyor example and obtained a dump4000.conveyor,
I encountered a problem when tried to convert the dump.file to VTK form file,
by typing 'lpp dump4000.conveyor', with an error displayed on screen of terminal on Linux,
"python can't open file 'home/eric/LIGGGHTS/mylpp/src/lpp.py".
Can any one has the same experience and sort it out? thanks.

I have followed the CFDEM installation manual to install the python -numpy, by typing
"sudo apt-get install python-numpy”.