I think the easiest and fastest way is still to just use the largest separation, like you alluded to, if the clump sizes are not vastly different among them.
Unfortunately, I don't think Chrono or DEM-Engine has a readily available tool for what you are after exactly. But a more intricate sampling scheme is out of the core functionality of DEM-Engine as well. I can imagine an algorithm that does that: You first randomly (or follow whatever policy of your choice) pick clump types and store them in an array, then you know the axes-aligned bounding box of all the particles you want to create. Then if you also know the cross-section shape of the region you'd like to fill, this problem is a classic 3D strip packing problem. Then you can solve it yourself or use some tools for that, e.g., py3dbp <https://pypi.org/project/py3dbp/>, packingsolver <https://github.com/fontanf/packingsolver>. Again, this seems like a standalone problem to me, and we are probably not going to integrate something like that into the solver itself any time soon; so you have to integrate it yourself. Thank you, Ruochun On Thursday, May 15, 2025 at 1:51:14 AM UTC+8 dylanstep...@gmail.com wrote: > Hello, > I am trying to spawn 6-7 different clump sizes within the same sampling > spawner (for example using sampler.SampleCylinderZ). The problem I am > running into is collisions between the particles on the initial spawn > causing a very large velocity. I have been messing around with spacing > within the cylinder spawner, but I am mainly curious to see if there is a > more efficient way to do this? > I am aware of the method for building a terrain GRC-1 from the Chrono > papers and demos, but I am curious if there would be a better packing > method for the multi-sized clumps? > > Thank you! > -- 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 projectchrono+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/projectchrono/01eb40fe-b1ce-4f84-b4e3-eff4c9cbec86n%40googlegroups.com.
