Hello Kan
There is no precise answer to your question, unless you give us the stiffness of particles, their density and sizes, and the number of iterations you need. I can confirm the numbers given by Vaclav below, but they can fluctuate a lot depending on the parameters of the model. To give you an idea, the number of particles in my DEM simulations are usually between 10,000 and 20,000; and the computations need often more than 1 hour. But again, they need more than an hour because I need more than 100,000 iterations. Would I need only 1000 iterations, then the computation time would be 100 times less. The only thing I'm sure is that 1 million particles is a lot. I don't think somebody tried this before. Bruno >> 2. How long will it take to get a good result if I simulate about >> 1Million particles with my computer? or how long it will take to compute >> 1sec at real-world time, or what is the general time step in the DEM >> part of YADE---the level of 1 ms, or 0.001 ms? >> > > Those who have done large simulations (Bruno, Janek?) can respond from > experience. For the timestep, it will be in the order of elastic wave > propagating over the distance of particle diameter. E.g. for concrete with > particles of 1mm and 4000m/s, it would give some 2.5e-7s, i.e. 250ns (am I > wrong here?). > > There is dynamic timestepper that will adjust dt based on stiffnesses of > interactions. > > Regards, > > Vaclav > _______________________________________________ > Yade-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/yade-users > > _______________________________________________ Yade-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/yade-users
