Hi, this is a more-less normal time step for simulations. Sometimes I have to do: O.dt = 0.1*pWavetimestep
2010/7/8 Michael Jensen <[email protected]> > one thing that I would be particularly interested in is how the formula on > this page: > > https://www.yade-dem.org/sphinx/yade.utils.html#yade.utils.PWaveTimeStep > > for spherepwavetimestep is computed. > > 2.8284271247461903e-07 is a very small number, meaning a huge > number of iterations are required (almost 10 million) before a=20 > single second goes by in the simulation. that's a hell of a lot > of iterations! for one second! is it really necessary? > > -mike.. > > > --- On *Thu, 7/8/10, Bruno Chareyre <[email protected]>* wrote: > > > From: Bruno Chareyre <[email protected]> > Subject: Re: [Yade-users] hello? -help with a spinning bucket! > To: [email protected] > Received: Thursday, July 8, 2010, 10:13 AM > > > It seems to me that if I put some beads into a container, then tip the > container, the angle at which they start flowing is the angle of internal > friction.. I am not at all sure of this, it seems far to simple. > > Not really. Angle of repose corresponds to "internal packing friction", > which "depends on" contact friction but is not equal. > Most materials have contact friction around 30°. Put this value at contact > in a loose sphere packing and you will get an internal friction around 18°. > Anyway, you should get realistic results as soon as you define a decent > friction (say between 10 and 40), this is not a crucial parameter yet. > > Bruno > > > -----Inline Attachment Follows----- > > _______________________________________________ > Mailing list: > https://launchpad.net/~yade-users<https://launchpad.net/%7Eyade-users> > Post to : > [email protected]<http://mc/[email protected]> > Unsubscribe : > https://launchpad.net/~yade-users<https://launchpad.net/%7Eyade-users> > More help : https://help.launchpad.net/ListHelp > > > > _______________________________________________ > Mailing list: > https://launchpad.net/~yade-users<https://launchpad.net/%7Eyade-users> > Post to : [email protected] > Unsubscribe : > https://launchpad.net/~yade-users<https://launchpad.net/%7Eyade-users> > More help : https://help.launchpad.net/ListHelp > >
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