LIGGGHTS® - User Forum

I'm trying to simulate a cylindrical particle damper and basically have my simulation up and running now. But... I can't figure out how to extract the quantity I'm interested in: the energy dissipated by the interparticle and wall collisions (either integrated over time or per timestep).

Any ideas? Thanks.

Could somebody help me to understand this piece of input code used for temperature trigerred shrinkage code

#set particle temperature for half the bed
1. region halfbed block 0 INF INF INF INF INF units box
2. set region halfbed property/peratom Temp 800.

Having problems here.

I have downloaded LIGGGHTS_2p2p2.tar

make package-status yields,in part:

Package.sh: line 11: cd: GRANULAR: No such file or directory
Installed NO: package GRANULAR

and indeed there is no src/GRANULAR subdirectory

pressing onward

make openmpi was successful

Hi all,
I'm trying to install liggghts in ubuntu but I've had some troubles. When I type "sudo apt-get install openmpi openmpi-devel" shows up the follow message :

Leyendo lista de paquetes... Hecho
Creando árbol de dependencias
Leyendo la información de estado... Hecho
E: No se ha podido localizar el paquete openmpi
E: No se ha podido localizar el paquete openmpi-devel

In order to get over this problem I followed instruction that I found on internet:

Hi,

HAPPY NEW YEAR ;)

I have successfully compiled balance.cpp and balance.h and then I recompiled CFDEM to introduce balance command to it. Now static load balancing command is activated in LIGGGHTS-PUBLIC and It works very well. Also I check it on the Cluster and everything seems fine.

But when I tried to run CFDEM I faced with the following errors. Then I separably checked ligghts in two state : 1. without restart file 2. with restart file. It seems when information read from restart file liggghts crashes.

Any one has any idea ???

Hi,
I am a beginner of LIGGGHTS, I always met such termination of the program,like this:

Hi everyone!
I have trouble to use fix pour command! The related script is just like this:

region beads block -0.1 0.1 -0.1 0.1 0.1 0.3 units box
fix 4 all pour 2000 1 300719 region beads vol 0.13 50 diam 0.01 0.01

I don't think there are any problems,but liggghts doesn't recognize this as a valid fix style(ERROR: Invalid fix style (modify.cpp:710)). This really confused me! Can you help me? Thanks a lot!

Regards!
Mike

Hi,all
I have a question. I want to simulate particles pouring into a cone. But some problems really confused me!
From the manual on this website :http://nf.nci.org.au/facilities/software/LIGGGHTS/doc/fix_wall_gran.html, I should make the input script like this:
fix conewall all wall/gran/hertz/history 0 0 zcone 0 0.2 0.05 0.1 1
But the LIGGGHTS tells me that "Need to use define style 'mesh' or 'primitive' (fix_wall_gran.cpp:224)"

Another beginner question:

I'd like to output the total number of atoms per timestep. This can already be in the thermo_style output so can be extracted from the log file by editing out all the other compute comments and warnings, but this is a little tedious.

Is there a way to either suppress the comments during the solve or write out the thermo_style output to a separate file? Or perhaps put the atoms # into the dump file?
thanks.

hi
Is it possible to model the interaction of two CAD files? for example in a case: rotating one CAD file may cause rotating another CAD file.

Thanks