LIGGGHTS® - User Forum

Hi Everyone,

I have been trying to figure out a way to pack particles with superquadrics and use that as a template for a multisphere superquadric. Does LIGGGHTS-PUBLIC currently support this kind of setup? Is saving a pack state and loading it even possible in general?

Kind Regards,
Matt

Hello ,
I have a problem with the LIGGGHTS post processing process
I wanted to make a test with chute_wear but when I make : lpp dump*.chute , I have an error occuring : command lpp not found

Also when I run Paraview I have lots of error lines :
Xlib: extension "GLX" missing on display ":10.0".

May I have any suggest to fix these errors ?
Thank you !

HI,

This is the consecutive question of "FORCE ON MESH NOT CONSISTENT", https://www.cfdem.com/forums/force-mesh-not-consistent

It was told that the force on mesh should be averaged at least for 1000 time-steps.

What is the justification of the value of 1000 time-steps?

If I make the average with the different number of data, the statistics of the forces change a lot.

Would you give a hint for me to get the appropriate statistics of the forces on mesh?

Thanks,
Hakun

Please help!
I have run install.py with no problem. But when i try to test liggghts from python. It has two error:OSError:/usr/lib/libmpi_cxx.so1:undefined symbol:ompi_mpi_real ;OSError: Could not load LIGGGHTS dynamic library. I have run "make makeshlib" and "make -f Makefile.shlib auto" with no error. I don't know how to fix it.
PS:My system is ubuntu 16.04
THANKS in advance.
If you could help. Best Regards

I am trying to make my own CAD file similar to the chute tutorial. I can model in SolidWorks and export as ASCII stl file. I do not understand what is "insertion face". Why is that important? and how do i obtain that?

Hello,

I'm trying to compile/install LIGGGHTS latest version but I'm having problem as followings:

Hi everyone,

Is there anyone have successfully installed mpi executable of Liggghts-Public on Windows?
I tried several ways but none of them worked:

Hello,
I'm new with these kind of softwares. after some researches , I have found that it exists 2 software of LIGGGHTS.
The first; "LIGGGHTS" and the other one "LIGGGHTS-WITH-BONDS" ;
I wanted to know if there is a particular difference between these 2 ; and also , as i want to install this software , which one is the best ?
Do their installations differ from each other ?
Thank You !

Good morning,

Does anyone know which magnitude is used as the 'particle radius' for calculation of Rayleigh time-step of a multisphere representation?

Thank you in advance,

hi there,
I found out that there are 2 command that can give the heat flux of the particles:
1. fix heat/gran/conduction command
2. compute pair/gran/local command
And i guess the unit of both heat flux is energy/time (J/second). and i guess both of them are conductive heat transfer between particles.
So, what is the different between them?

P.S. i tried some cases, the output of these two command are different, although both of them named HeatFlux.
thx.