LIGGGHTS® - User Forum

Dear all,
I am doing triaxial test and I want to know average force on the wall. The average force must be result of vector addition. For this I am using the following command.

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fix force1 all ave/time 1 1000 1000 f_twall_servo[1] f_twall_servo[2] f_twall_servo[3] file graph_run2/force_twall.dat mode vector
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But it is giving me an error:

Is it possible to assign a different template to a different group of atoms?
And how to create a different set of atoms for the same

Lastest version of LIGGGHTS in Windows 10

While doing Triaxial test. I have first applied confining pressure (200k) on all 6 wall and then applied fix modify command to modify the target value for top and bottom wall so that additional deviator stress can be applied.

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fix twall_servo all mesh/surface/stress/servo file meshes/sample_4/topwall.stl type 2 com 1.0 1.0 4.0 ctrlPV force axis 0.0 0.0 1.0 target_val -${f_top} vel_max ${vel} kp ${kp1}

run 500000 # run for confinment

fix_modify twall_servo servo/target_val -${f1_top}

Hi all,

I am new to LIGGGHTS and aspire to learn more about using DEM. I am using Windows 10 and have used various methods to install LIGGGHTS. I have managed to build LIGGGHTS with the instructions from Christian:
https://www.cfdem.com/forums/alternative-cmake-build-environment

I am running Cygwin in Windows and was trying to run this command just now:
$ make -f Makefile.shlib auto

But I get the following error:

Hello every one

I am trying to run bonded particle simulation but I am getting an error

----------------------------------------------------------------------
ERROR: Invalid atom_style command (../atom_vec.cpp:75)
--------------------------------------------------------------------------

#bond

atom_style hybrid granular bond/gran n_bondtypes 1 bonds_per_atom 6
#atom_style granular
atom_modify map array
boundary f f f
newton off

#processors 2 1 1

communicate single vel yes

units si

Dear all,

I use LIGGGHTS-PUBLIC 3.8.0 to perform 2D simulations for particle mixing in a rotary drum.

When I use the real coefficient of restitution (0.82) for the mixing material, the real time spent is much higher than I use the default value 0.5 in many other simulation cases.

I recently met this problem when I compiled a pack of source codes, does anyone have any clues what this syntax error is? The application file is called fix evaporate.C in the directory. I want to use this command to calculate the outflow mass rate and delete some particles at a certain rate in my simulation! I added this file into the original SRC directory and recompiled, then the system showed me the information below:

I am attempting to modify the auger tutorial script to use superquadratic particles and I am running into the following error: Invalid attribute in dump custom command (../dump_custom.cpp:146). I believe the error is related to the dump syntax. Any help and suggestion is greatly appreciated. I have attached the input file and the relevant geometry folder.

Hello everyone;
I am trying to validate my numerical model with previous model. Therefore, I am trying to generate 6614 particles into the region 0.028 x 0.0054 x 0.0576, which the particle bed porosity is 0.39. However, I cannot obtain the same result.
LIGGGHTS inserted less particles than requested and my porosity is much higher than model in previous study