Hi,
To my understanding, Meff (effective mass) used in contact models can be calculated from "density" defined in
fix pts1 all particletemplate/sphere ...
but I have questions as follows:
1. I need to know how to define the mass for walls including mesh to be used in Meff.
2. please let me know If there is a way to directly define Meff used in hertz/stiffness or hooke/stiffness (I want to set it unity for simplicity).
Thank you
richti83 | Fri, 08/17/2018 - 19:52
for walls only the particle
for walls only the particle mass is used:
https://github.com/CFDEMproject/LIGGGHTS-PUBLIC/blob/master/src/fix_wall...
which goes from https://github.com/CFDEMproject/LIGGGHTS-PUBLIC/blob/master/src/fix_wall...
to https://github.com/CFDEMproject/LIGGGHTS-PUBLIC/blob/master/src/normal_m...
I think as the wall is non-defermable only radius of particle and particle mass is relevant in DEM.
About 2.: yes mass is directly calculated from density, so when you know your particle radius you can calculate volume and than the needed density for unity mass.
ykusaka | Sun, 08/26/2018 - 09:11
Thank you
Thank you for your very comprehensive guidance.