Question #194761 on Yade changed: https://answers.launchpad.net/yade/+question/194761
Luc Scholtès proposed the following answer: Hi, First, you should know that size does not matter in YADE, or, at least, should not. Indeed, interaction laws (at least, the basic ones like Law2_ScGeom_FrictPhys_CundallStrack or CohesiveFrictionalContactLaw for example) have been implemented so that they are size independent. You can try to run several triaxial tests with same parameters and loading conditions on samples with different sizes length to verify (be careful nonetheless to have "enough" particles in your samples, between 5000 and 10000 is OK from my own experience). So, YES, people usually use bigger particles than real ones in order to speed up simulations, and NO, there should not be any influence on the results. Concerning now particle size distribution, I am not a specialist but it will certainly have an impact on you results, like for real granular materials. Things exist in YADE to manage particle size distribution. As you pointed out, an extended size distribution tends to penalize simulation time. Concerning now your last point about grain shape and roughness. Of course they influence the behaviour. You cannot, for example, reproduce real sand's internal friction angle with spherical particles as sand grains are not spherical in nature. That's one of the reason why some people use clumps or rolling moment law for example (polyhedral particles are not yet implemented in YADE). Please have a look here for more information if not already done: https ://yade-dem.org/doc/index-toctree.html Cheers Luc -- You received this question notification because you are a member of yade-users, which is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp