LIGGGHTS® - Developer Forum

Hello guys

I wrote this code :

atom_style granular

#atom_modify map array

boundary p p p

newton off

communicate single vel yes

units si

region reg block -0.005 0.005 -0.005 0.005 0.0 0.03 units box

create_box 2 reg

neighbor 0.002 bin

neigh_modify delay 0 contact_distance_factor 1.5

hard_particles yes

Hi,

I've been trying to modify the source code and add new class into src dir. I added both .cpp and .h and make clean-all and make auto under src dir. I also checked that lmp_auto file is generated. But my modified file and added files were not compiled and i could not call them in my script. Did i miss something?

Thanks

Hello Team,

Greetings. Could you point me to any resources on modifying the source code and add a new force model to LIGGGHTS? I'm specifically looking to add van der Waals force. Please let me know and any suggestions are welcome.

Thank you,
Jagan Mohan.

Hello!

Hello Development Team,

Could you elaborate more on this implementation? In my CFDEM setup, LIGGGHTS file has a gravity vector which is time-dependent, varies sinusoidally to mimic vibration of particles. Is this model to be used in these cases? We anyhow have constant gravity dictionary in OpenFOAM setup as well?

Thank you,
Jagan Mohan.

Hey, can someone help me solve this problems? I did some modification on the code, and the compiling was successful, however, when I actually run a test case, it gave me the following errors on the screen:
[VB2:27524] *** Process received signal ***
[VB2:27524] Signal: Segmentation fault (11)
[VB2:27524] Signal code: Address not mapped (1)
[VB2:27524] Failing at address: 0xfffffffffffffff8
[VB2:27524] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fda5c2a2390]
[VB2:27524] [ 1] ./lmp_auto[0xa8bac7]
[VB2:27524] [ 2] ./lmp_auto[0x530b3a]

Hello Dev Team,

Greetings. I'm facing this issue where I loose particles from a periodic boundary of a triclinic box even though I do not impose any forces. I'm using two input files. First one introduces 483 particles into an orthogonal box with a volume fraction of 0.15 and then I shrink this box to quarter of its length in only x-direction. Please see attached figure for last configuration in which forces, velocities are non-zero and force magnitude on few particles is quite high.

Hi,

Hello,
I have been following the LAMMPS development and recently a pull request was made to add the ability for the python API to extract the neighbor list (https://github.com/lammps/lammps/commit/b1668f28dda3c94929aec774f31cd537...).

Hello Team,

Good morning. I'm trying to learn LIGGGHTS to simulate the filling of the spherical particles into a cuboid container defined by 6 planes oriented along X-Y-Z axes.