LIGGGHTS® - User Forum

Hello everyone,

I got a problem when I'm trying to couple palabos and liggghts as show below.

Dear community!
I'm trying to conduct the first part of triaxial test -confinig. For this I am moving 6 wall using stress/servo command. This wells shold be periodic.
Does anybody know what kind command should I use for periodic moved wall/mesh?

Below example from my script.

Fix x1 all mesh/surface/stress/servo file meshes/x1_conf.stl type 1 com 0. 0.00175 0.001 ctrlPV force axis 1. 0. 0. target_val 5.0 vel_max 0.05 kp 3

Hello everyone
I am doing a simulation to check the bulk density of the particles, which is filled in a box. I want to know the bulk density or mass of the particles within the box.
How can I do this?

I have a complicated geometry and I want to count the particle through any cross-sections (which is basically a plane).

I was thinking to define a plane (for example the "region" command can define a "plane") and then use this massflow/mesh command. I thought it should be straightforward.

Dear All users,

I am wondering if the fix-deform and superquadric are compatible, especially for remapping the particles when the domain starts to inflate or shrink.

Kind regards,
Lumb

Hi Everyone,

It is possible for someone to let me know, the procedure to calculate coordination number (CN) for superquads?. Presently, I am using the compute for spherical particles, which is giving very high values (expected but unsure of the procedure) of CN.

As there are possibilities of face to face contacts in superquads as opposed to only point to point contact in spheres, I am wondering how it is being accounted for in the calculation.

Very much appreciated,
Sounik

I want to simulate a system of micro-sized particles via molecuar dynamic method. I have tried Lammpas and I know the Liggghts is more convenient for granular systems. I read topics in forums that have been reported problems in simulation of charged particles via Liggghts.
Finally, does Liggghts supports colloid packeage or no?
looking forward to get answers from developers.

Thanks

I have designed a box and trying to insert particles. But after computation, on viewing through PARAVIEW i cannot find the particles. I am new to LIGGGTS, any assistance at all appreciated. attaching herwith the code and files. the stl files are uploaded as pdf.

I run the cfdemCompCFDEMLIG, and a while later,
the following message showed up.
Does this mean I compiled liggghts sucessfully?

make[1]: Leaving directory '/home/ubantucl/LIGGGHTS/LIGGGHTS-PUBLIC/src/Obj_auto'

Hi, I am currently using a multisphere approach in a simulation with a washino/capillary/viscous model. I have inserted both an inertia tensor and mass as stated in the documentation however when I run the simulation the particles disappear after the insertion stage. I ran the script again without the inertia tensor and mass values allowing LIGGGHTS to calculate these through the Monte Carlo approach. The script ran fine and the particles are present, however the difference in mass, inertia tensor and n-sphere values for the approaches are very different.