Re: [Yade-users] [Question #681232]: Sphere goes through the facet wall in Harmonic vibration
Question #681232 on Yade changed: https://answers.launchpad.net/yade/+question/681232 gaoxuesong posted a new comment: > the time step The PWaveTimeStep is 1.02e-08. By the way, the default option of Yade is in parallel and uses all of the available cores? In the tutorial, it says, "By default, each job uses all available cores for itself, which causes jobs to be effectively run in parallel. Number of cores per job can be globally changed via the --job-threads option" If i just start a job by "yade pyname.py", is it executed in parallel and uses the available cores? If so, how many cores does it use when i start a new job without designating the cores to use? To grab some cores from the first job? > the meaning of the mass reduction For my case, the packing density is an important factor to affect the following process. Larger mass makes denser packing. So this is the meaning of the step. Yes. I agree with you the mass modification changes the physical process. But if we actually care about the random feature of particle packing not the exact the particle distribution. Thanks, Xuesong -- You received this question notification because your team yade-users 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
Re: [Yade-users] [Question #681232]: Sphere goes through the facet wall in Harmonic vibration
Question #681232 on Yade changed: https://answers.launchpad.net/yade/+question/681232 Jan Stránský requested more information: > time step is set as 1e7. As soon as the simulation starts, the particles explode and flow out. it seems like the simulation is unstable = has too large time step. What is the value of PWaveTimeStep? Concerning mass reduction, what does "last step" in "the last step is mass shrinking" mean? At the end of simulation? Now I understand what you mean, but don't see the point / advantage fro its usage.. As said, any material parameters modifications "to make the simulation faster" changes the physics. If it is suitable is very individual and there is no general answer if it is good or bad. cheers Jan -- You received this question notification because your team yade-users 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
Re: [Yade-users] [Question #681007]: Unable to locate package yadedaily
Question #681007 on Yade changed: https://answers.launchpad.net/yade/+question/681007 Status: Open => Expired Launchpad Janitor expired the question: This question was expired because it remained in the 'Open' state without activity for the last 15 days. -- You received this question notification because your team yade-users 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
Re: [Yade-users] [Question #681232]: Sphere goes through the facet wall in Harmonic vibration
Question #681232 on Yade changed: https://answers.launchpad.net/yade/+question/681232 Bruno Chareyre proposed the following answer: Hi >the density is amplified by a factor of 1e9 to increase the calculation speed It will not work. With such mass the particles will be nearly immobile on short time scale, and that's probably why the piston goes through. Or you would have to scale down frequency by the sqrt of this multiplier, hence exactly the same number of time iterations in total. Bruno -- You received this question notification because your team yade-users 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
Re: [Yade-users] [Question #681280]: On Inertia and rotational energy of a particle
Question #681280 on Yade changed: https://answers.launchpad.net/yade/+question/681280 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, Rotational inertia is a tensor, we represent it by the eigen values. https://en.wikipedia.org/wiki/Moment_of_inertia Bruno -- You received this question notification because your team yade-users 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
[Yade-users] [Question #681280]: On Inertia and rotational energy of a particle
New question #681280 on Yade: https://answers.launchpad.net/yade/+question/681280 In YADE document, it says that "inertia(=Vector3r::Zero()) Inertia of associated body, in local coordinate system." I am wondering inertia is actually a scalar,why here indicates it has three components? If I want to an overall inertial (not three components)should I add or multiply them together? -- You received this question notification because your team yade-users 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
