2D and 3D HLBM object contact stiffness

[guojuw]

Dear OLB developers,

How can I change the particle to particle contact stiffness for HLBM objects in 2D and 3D?

Regards,
Junwei Guo

[mathias]

There is no stiffness, in the limit it is a hard-sphere collision. But you may add a collision model. Best Mathias

[guojuw]

Dear Mathias,

I mean the parameter gamma in equation(9). How to modify this particle collision parameter?

Regards,
Junwei Guo

Article (Krause2017)
Krause, M. J.; Klemens, F.; Henn, T.; Trunk, R. & Nirschl, H.
Particle flow simulations with homogenised lattice Boltzmann methods
Particuology, Elsevier, 2017 , 34 , 1-13

[mathias]

For it, you need to change the source code to add an additional force according to the paper in ParticleDynamics2D. In the examples we did not add a particle-particle force.

[guojuw]

Dear Dr. Mathias,

I think the current hard sphere collision model will result in spheres overlapping if the suspension is not dilute or multiple contacts occur. Would you mind to share your code used for elastic collision (the implementation of parameter gamma) showing in your paper?

Thanks,
Junwei Guo

[Author]

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