LIGGGHTS® - User Forum

warning messages:


Setting up run ...
175 mesh elements have high aspect ratio (angle < 0.500000 °)
WARNING: Mesh contains highly skewed element (multi_node_mesh_parallel_I.h:513)
Import and parallelization of mesh cad containing 1448 triangle(s) successful
149 mesh elements have high aspect ratio (angle < 0.500000 °)
WARNING: Mesh contains highly skewed element (multi_node_mesh_parallel_I.h:513)
Import and parallelization of mesh cad2 containing 10288 triangle(s) successful
INFO: Resetting random generator for region bc
Memory usage per processor = 11.1755 Mbytes


Hi, all.
I'm new to LIGGGHTS and Linux, and I'm quite interested in DEM simulation, so I begin my study on LIGGGHTS.
During the past few days, I ran into lots of problems during the installation of LIGGGHTS and its post-processing tool (lpp improved based on pizza.py), thanks for helps from the forums.

Now I'd like to share my experience of installation, which is not shown in Installation Tutorial. My OS is Ubuntu 12.04, initially I use Fedora 16, but my friend suggests Ubuntu is suitable for newbie :)

Hi all
I have installed LIGGGHTS and it works well with its examples. But when I want to run lammps examples it does not work for some of them. I ran the lampps examples in the same way as liggghts examples and it works for some examples such as "intend" and "rigid". But it does not work for "dipole" and "eim" examples. there is the error massage for these examples in the following:

liggghts

Hi,

I am trying to write the mass of contained within a region to a file. I get an error at
step 10000 (I call the fix print every 10000 cycles) and the program exits. Could someone help me with my problem.

I am trying to follow the example shown in the "How To Liggghts" document under the calculate mass flow section (section 6).

My script and other associated files are attached.

Thank you

Kirk

Hallo everbody,

I've got a Problem when simulating larger number of Particles.

For instance, i've created a simple simulation for testing with 10000 Particles over 50 timesteps. The simulation starts and finishes quite fine in a few seconds.

Then I take the exact same simulation (particles are insertet via: fix ins nve_group pour/dev nparticles ${n_Particle} 1 distributiontemplate pdd1 region bc) but with n_Particle equal 1000000.

Now simulation starts and on my screen it is displayed:

...
Setting up run ...
Memory usage per processor...
step atoms ....

Hi, all.
I'm new to LIGGGHTS and Linux OS.
When I follow the Installation Tutorial to install LIGGGHTS, I get a problem.

My OS is Fedora 16.

1. when typing "which mpirun"

-------------------------------------------------------
/usr/bin/which: no mpirun in (/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/jian/.local/bin:/home/jian/bin)
-------------------------------------------------------

The above information is right? or openmpi is not installed well?

2. in /src directory, type "make clean-all", then "make fedora -j"

Hi!

I have recently switched to LIGGGHTS 2 and having some issues while running the insert/rate/region fix.


fix ins1 nve_group insert/rate/region seed 10001 distributiontemplate pdd2 mass 3.888 massrate 3.888 insert_every 1 region bc


But it give sthe following warnings, could anybody explain the reason. I am also attaching the input script.


WARNING: Particle insertion : Inserting no particle - check particle insertion settings (fix_insert.cpp:469)


Thanks,
TM

Hello, recently i used Liggghts Version 2.1.1 to do some simulations, howver I found two problems.
First, I found the simulation using Version 2.1.1 was very, very slow, I guess it was probaly about 6 times slower than the simualtion suing Version 1.5.1.
I don't know if anyone has similar problem.

Second, i met "insert region" problem when there were four materials in the simulation, it seems Liggghts didn't recoginze my definition of insert region
however, there was no such problem for the simulation with three materials. I attached my input file, maybe someone can help me with it.

error message

=======================================================================
LIGGGHTS (Version LIGGGHTS-PUBLIC 2.0.7, compiled 2012-08-25-16:06:53 by spe based on LAMMPS 20 Apr 2012)
Created orthogonal box = (-0.85 -0.08 -0.08) to (0.01 0.08 0.14)
1 by 1 by 1 MPI processor grid

Reading STL file 'barrel.stl'
Solid body detected in STL file
End of solid body detected in STL file.

Reading STL file 'screw.stl'
Solid body detected in STL file
End of solid body detected in STL file.

Hi All,

I want to learn how to set up the model of A rotary drum shown in the LIGGGHTS Feature, moving mesh. Is this model in the liggghts examples? or How can I find it?

Thanks,

Kun