radius expansion method || Triaxial test

Submitted by Rahul Kumar on Wed, 02/19/2020 - 07:49

Hi
I am doing triaxial test simulation. I want to use radius expansion method to prepare initial configuration of particle. Is there any such command in LIGGGHTS.
I am using LIGGGHTS 3.7.0 version

mschramm | Wed, 02/19/2020 - 15:43

Hello,
The command you are after is fix adapt
https://www.cfdem.com/media/DEM/docu/fix_adapt.html

There is an example in the LIGGGHTS Tutorials
$LIGGGHTS_INSTALL_DIR/examples/LIGGGHTS/Tutorials_public/packing

In the example, we start with an insertion of particles smaller than what we want. We then "grow" the radii of the spheres at a specific rate to a achieve the packing density that we want.