LIGGGHTS® - Developer Forum

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.

Hi how can I access fluid velocity in the LIGGGHTS source code. I need to use it in custom cohession model.

Hi all,

This is just a follow up from my previous forum question. I was wondering how to access the particle temperatures at a particular timestep. I know that it is part of the 'fix' class but not sure how or where it is stored and how it is dumped into my .vtk file.

All help is appreciated!!

Thanks,

Aishwarya