LIGGGHTS® - User Forum

Hello all,

I am using compute_stress/atom class. I see the per atom stress is the pair_wise atom stress, not including the stress between the wall and the atom. Is there a simple method to achieve this function?

Thanks in advance.

Leo

Hello All,

I would like to test Liggghts. Is there a windows version available?

Thanks

Dear All

Is there any command to define "dynamic friction coefficient" between particles

regards

Esmaeil

I'm already working on a mill simulation and i'm trying to count the particles that come out of the mill. For this, i'm using the massflow/mesh command, however i have a problem with one of the keywords. Specifically, the vec_side command, because i don't know what it means this "vector components defining the "outside" of the mesh". My stl surface is in the 5.3,0,0 coordinates, but when compile the file, it doesn't count the particles.

Please, i need some help.

Best regards, Nicolás.

Dear all,

I am struggling with dump custom/vtk (3.2.0 and 3.3.0) that always results in an error: Invalid dump style (output.cpp: 591). I have not tried this command before. I usually use lpp to convert to vtk. An example of my using dump custom/vtk as below:

dump dmp all custom/vtk 10000 dump.liggghts_init id type type x y z ix iy iz vx vy vz fx fy fz omegax omegay omegaz radius

Thank for concern,

Regards,

Hi, All:

Hi vinaym,

by mistake (moving and deleting the old thread) I deleted your thread. I am sorry. Find below your original one and my answer.

Bests
Andreas

Hello all,

I tried compiling latest version : LIGGGHTS® 3.2.0 (released 29 April 2015) with the optional packages ASPHERE and MOLECULE.

But I get the following error.

Hi,

I am using 'lmp.extract_compute' in the python. This function could give the right value belong to compute class, but the return value is not ordered by ID. So I checked the library.cpp. I modify the cpp like the function 'data = lmp.gather_atoms(name,type,count)' which could return the value ordered by ID. But I failed. I will appreciate if anyone could help me.

The original cpp shows as follows:

void *lammps_extract_compute(void *ptr, char *id, int style, int type)
{
LAMMPS *lmp = (LAMMPS *) ptr;

Hi everybody,

my problem is the following: if I set the value of 'thermo_modify lost value' to error or warn, I do not get an error or warning message during the execution of the simulation although particles are leaving the simulation domain.

Hey Guys, I'm using the "lattice" command prior to the "create_atoms" command, and I would really like to know what " lattice constant" in the "scale" keyword denotes. Is it the edge length of a unit cell or is it the diagonal length of the unit cell in 3D ? I want to create different packing structures using fcc, bcc , and so on by making the two particles ( 0.01m dia ) touching each other in every unit cell. Will my lattice constant be same for all styles viz. hcp, fcc, bcc, sc and diamond ?? please help.

regards,
Anand