Hi, To my understanding, the size distribution of lunar regolith particles (or at least a reasonable DEM representation of that) does not span 12+ orders of magnitude: That is like the difference between an atom and a mountain. Papers from NASA <https://www.sciencedirect.com/science/article/pii/S0022489810000388#fig3> show about 2 orders of magnitude of difference. You have little hope of simulating 12+ orders of magnitude in Chrono either. Neither the force model nor the numerical resolution will be sufficient.
Chrono DEM-Engine is able to handle 2 orders of magnitude of particle size difference though, or even a bit more than that. The performance impact should be minimal as Chrono DEM-Engine tried to hide the cost of contact detection which is affected by particle size discrepancy more. We have a related paper here <https://link.springer.com/article/10.1007/s00366-023-01921-9> doing a similar task. Thank you, Ruochun On Thursday, May 30, 2024 at 7:23:46 AM UTC+8 [email protected] wrote: > Hello again all! My project involves simulating a granular material, > specifically lunar regolith, which has a particle size distribution that > spans 12+ orders of magnitude. Based on what I've seen from other studies, > there are limitations on just how wide a DEM model's particle size > distribution can (I assume in order to maintain numerical stability but do > not actually know for sure). > > Does anyone have information or experience in dealing with wide particle > size distributions in Chrono? I am trying to understand and explain > limitations and possible ways around them. Thanks in advance! > > > Best, > Jared Long-Fox > -- You received this message because you are subscribed to the Google Groups "ProjectChrono" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/projectchrono/4afa92c3-7052-4f8e-bd01-716470e0cadan%40googlegroups.com.
