LIGGGHTS® - User Forum

Hi, everyone

I've been trying to compile LIGGGHTS 3.6.0 on both my mac and centOS by:

cd src
make clean-all
cd STUBS
make clean
cd ..
make serial

However, I kept getting this error message:
mpi_liggghts.h:82:10: error: use of undeclared identifier 'MPI_UNSIGNED_LONG'

I succeeded on compilation of LIGGGHTS 3.4, however I had this problem when trying to compile LIGGGHTS 3.5 and 3.6
Appreciate very much if anyone could help!

Best Regards,
Renge

Hi All, I was faced with the following error:

ERROR on proc 0: Cannot open mesh file filename.stl (../input_mesh_tri.cpp:105)

Please help me for solving it.

Thanks a lot,
Ali

Dear all,
Does anyone know some open source codes that can do the multisphere approximation from tomographic data? Something like this software http://www.cogency.co.za/software. Thanks,
Regards,
zyan

Hi All,

Find attached insertion_face.stl (to be put in folder meshes) and an input file.

I am troubled with need to count the particles of Type 1 with time in the domain and I have defined the particles of Type 1 as tracer and the output is zero, I am wondering what could be wrong with my script.

Thank you for your help.

Hi CFDEMers/Liggghtsers,

I need to know an example about id group and how can i include a armonic movement in sph example?

Hi there,

Hi all,

I am trying to get the coordination number of every atom during a simulation and I set out coord/atom command as

#Output settings, include total thermal energy
fix ts all check/timestep/gran 1000 0.15 0.15
compute rke all erotate/sphere
compute nconts all coord/atom 0.015 mix yes
thermo_style custom step atoms ke c_rke c_nconts f_ts[1] f_ts[2] vol
thermo 1000
thermo_modify lost ignore norm no
compute_modify thermo_temp dynamic yes

I am doing a simulation of sandpile formation. I am wodering how can I get the instant number of particles in the sandpile since I use "lost ignore" to delete the paticles that gose to far from the pile.

Actually, I want to use this number in a judgement condition of a loop to control the max number I should pour on the sandpile.

Hi everyone,

I am trying to learn more about the LIGGGHTS. In this scenarios, I tried to set a moving region with constant temperature, so I wrote

variable dy equal "0.08*(step-20000)/30000"
region pos_source block -0.05 0.05 -0.05 -0.03 0.0 0.05 move NULL v_dy NULL
fix test all print 1000 "${dy}"
set region pos_source property/atom Temp 500

But the result shows the set command only affect once and give the same result as