I have some difficulties (questions) in DEM simulation in MARS, I kindly request you to help me for finding the following questions' answers.
1-
From files that you added in examples as DEM simulation, I found that we should use prism command with specific rows in X, Y and Z direction, or something like that for particle generation step, if we want to have a container full of particles how we can estimate the required prism row’s numbers for creating particles that will be compatible with our container capacity (volume)?
I mean in both approach, either with using Macro-Particles or without using Macro-particles (using spherical particles), we don’t know the exact position of particles after their rest in generation step, it means we don’t have their total exact volume, therefore, how can we select proper number for X, Y and Z prism rows?
If we cannot estimate the exact numbers of required particles (or prism rows or etc.) I think, in the generation step, for being sure that our container will be full of particles and we won't have any void, we should generate huge number of particles more than our container volume,do you know how can we delete extra particles in generation step (when we let particles move by gravity) before our main analysis?
2-
In the folders related to DEM examples, you put gen.mrs, run.mrs, hourglass.mrs, Sand.mrs and so on. In the sand.mrs (this file is in both DEM examples), we have X, Y and Z for all particles’ center (with their different radius) obtained at the end of generation step (after letting particles settle by gravity). Then, you properly used sand.mrs (Node list) for the main run in run.mrs.
How did you extract the second position of the particles’ center at the end of generation step? I mean, how did you create Sand.mrs for using in the main analysis?
Thank you for all you help.
Elham