LIGGGHTS® - User Forum

Hi,

I have to detect the enduring contacts, so I have to apply criteria which identifies which one of the neighbors are in tight contact. I suppose I have to modify the source code but how is that possible ?

Thanks
Mohammad

Hi, All

I want to use the command 'fix move/mesh mesh linear/variable' to compress a sand pack.
What I've done is:
variable yl equal -0.5*v_dy
fix moveleft all move/mesh mesh left wall linear linear/variable 0. ${yl} 0.

I've also tried using v_yl instead of ${yl}.
However the error says: variable name 1 for fix move/mesh linear/variable does not exist.

Appreciate any help!!

Hi all,

Is that possible to allow a certain level of overlap between particles without generating interaction force? Suppose I have two particles with radius R1 and R2 positioned in a distance of d

Dear All,

I want to study the rheology of granular particles flowing on a inclined plane. Here, i want to apply periodic boundary condition (PBC) along length and width of the inclined plane. When i applied PBC for this system, it is taking the PBC for the simulation box (cube) not for the inclined plane. Can someone please help me how can i apply PBC on a inclined plane?

Many Thanks,

Narendra

Hi,

Iam trying to fill a container with particles. How can I fill the container upto a specific height.

Hi!
I'm doing a simulation of a cone crusher in LIGGGHTS of 480000 steps, the problem is that halfway through my pc rebooted unexpectedly. I want to ask if there is a way of restart the simulation, from let's say, step 100000 without having to start all over again. I would aprecciate any help

Kind Regards

Hi, All

I'm a new user of LIGGGHTS, and am now here seeking for some help.
I am currently coding a simulation for compression triaxial tests.
I understand that using 'fix particledistribution/discrete', we are able to insert particles according to specific fraction of diameters.
However, I wonder if there is any approaches to present the whole particle size distribution curve for various particle diameters in a simulation?

Thank you.

Best Regards,
Renge

Hi all,
I am new in LIGGGHTS. Would you please guide me?

1- Can I install LIGGGHTS on windows? how?

2- Is it free?

3- Should I write my own code? or there are some pre-set code?

4- I want to study and see the movement of non spherical particles (needle shape) in pipeline containing fluid would you please guide me? can LIGGGHTS be helpful?

Regards,

Taher

Hi all,

I am running a simple case with 2 particles bouncing in a closed box.
At certain time, I can see there is a gap between particles and the wall but still it detects as a contact which seems to be wrong. (visualization in paraview )

I am writing the history of contact-area in the dump files called "localwall.contact" . You might be able to view this file when you run it.
In my case, it happens at 9579, 28851,48123 time-steps and so on i.e it happens for every 19272 time-steps after the first wrong detection.