I have issues concerning setting youngs modulus to a realistic value like 10 GPa. This requires insanely small timesteps.
In the documentatiom and in every thread on this question people say that it should not be bigger that 5e6 for si units or 5e5 for cgs.
But how would I go about modeling a simulation of a material that has a youngs modulus with magnitudes several times higher than 5e6 for the simulation?
I am using the hertz contact model so it seems to me like youngs modulus is just used as a linear multiplier (https://www.cfdem.com/media/DEM/docu/_images/pair_gran_html_m5aad056c.png). Does that mean that I should just downscale all parameters until the youngs modulus is small enough? I am already using cgs units because my particles are to small so when I just scale it down till my youngs modulus is under 5e5 the particles are to small...
ninazbh | Fri, 07/07/2017 - 16:09
you can use the following
you can use the following command in your code for assigning E>1e9 Pa to atoms (si unit) :
hard_particle yes
I hope it helps.
ninazbh | Fri, 07/07/2017 - 16:10
I noticed a typo!
I noticed a typo!
it is hard_particles yes.
liggghtschr | Mon, 07/10/2017 - 11:29
I can't find the command in
I can't find the command in the documentation, what exactly does it do? I am already able to use a big modulus the problem is that it forces me to use tiny timesteps.