Combine SPH and DEM

Hi

I´m Felipe Ligeti, how are you?. Oficcially, SPH + DEM is not implemented in PUBLIC-LIGGGHTS. The example of SPH that liggghts provide only works for a special atom style which is atom style sph, so you can´t add granular particles in that example because its a differente atom style (atom style granular). If you want to see a video of LIGGGHTS SPH example, i have done one:

https://www.youtube.com/watch?v=RVogLbsD4Ps

Also, is not possible to implemen stl files in that example (stl files cant act like a wall), however exist a user package called USER-SMD package for LAMMPS. It provides many material models (Johnson-Cook, plasticity with hardening, Mie-Grueneisen, Polynomial EOS) and allows new material models to be added. It implements rigid boundary conditions (walls) which can be specified as surface geometries from *.STL files. Maybe that could be a good starting point for your purpose. You can have a look of that package here:

http://lammps.sandia.gov/doc/Section_packages.html#user-smd-package

With this package, you can simulate something like this: https://www.youtube.com/watch?v=CwSqIuYRzMI

If you want more information about it, you can see this paper http://lammps.sandia.gov/doc/PDF/SMD_LAMMPS_userguide.pdf

Hope you are doing well, regards!

Hi FelipeL,

This is interesting, thank for sharing. I will place this into my to-do-list.

Regards,