Documentation not available - Material parameters - commands fix property/global

Submitted by manton on Thu, 04/07/2016 - 15:30

Hello,
The following webpage is not found.
http://www.cfdem.com/media/DEM/docu/fix_property_global.hmtl

Page not found
The requested page "/media/DEM/docu/fix_property_global.hmtl" could not be found.

Could you please update it. I would like to know the properties defined.

Forums:

manton | Fri, 04/15/2016 - 16:10

Hello josef,
Thanks. I also found this page. But apart from these properties as given below,

fix m1 all property/global youngsModulus peratomtype 5.e6
fix m2 all property/global poissonsRatio peratomtype 0.45
fix m3 all property/global coefficientRestitution peratomtypepair 1 0.3
fix m4 all property/global coefficientFriction peratomtypepair 1 0.5
fix m5 all property/global k_finnie peratomtypepair 1 1.0

Is there any other properties that i have to define for the particle. If so, can u list me the properties that can be defined globally.?

Do you have a library to define general particles say for example: sand ,sugar,etc??

j-kerbl's picture

j-kerbl | Mon, 04/18/2016 - 13:27

Hi Manton,

yes there are other properties, but this depends on the contact model you choose! Every contact model needs different properties. E.g. compare the tutorial files in.cohesion and in.noCohesion. You will see an additional property cohesionEnergyDensity where the sjkr model is active. Since there are lots of contact models available / being developed by different people such a list would be hard to maintain. Please see the documentation for each model to see which properties this model needs.
However nearly all model parameters are collected in https://github.com/CFDEMproject/LIGGGHTS-PUBLIC/blob/master/src/global_p...

I am sorry, we do not have a library for general particles. But I'm sure you'll find values for these materials in literature.

Cheers
Josef