Dear LIGGGHTS users and its creators,
I have just started using LIGGGHTS for DEM Simulations. I have been using LAMMPS for around 2 years now for the same. I have seen that LIGGGHTS takes constant coefficient of restitution as input even while we use Hertzian model. I don't see the point of providing the coefficient of restitution as input when I am providing the Young's modulus and Poisson's ratio. Moreover, the coefficient of restitution along with collision time is a function of velocity and making coefficient of restitution doesn't make much sense.
Can you please clarify this?
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liggghtschr | Fri, 07/07/2017 - 09:58
Check out the documentation
Check out the documentation for the hertz contact modell
https://www.cfdem.com/media/DEM/docu/gran_model_hertz.html
Sonu Kumar | Fri, 07/07/2017 - 10:42
Re:Check the Documentaton
In the documentation, it needs coefficient of restitution to calculate the properties. However, in real life, coefficient of restitution depends on those properties.
e.g. in the paper : https://journals.aps.org/pre/abstract/10.1103/PhysRevE.53.5382
new_to_DEM | Tue, 08/21/2018 - 01:54
coefficient of restitution and damping
Hello,
I am very new to LIGGGHTS and I noticed that the coefficient of restitution is directly entered as a constant parameter. How is the damping coefficient calculated from this exactly? I realize this is a very basic question, so I apologize for my lack of knowledge in this subject. Thanks!
new_to_DEM | Tue, 08/21/2018 - 01:57
coefficient of restitution and damping
Please disregard this post. I feel a bit silly because I found it clearly defined in the documentation now.