> Hello, > > In the script file > > https://yade-dem.org/index.php/ScriptPlotInteractionForcesHistogram > > I don't understand why the interaction forces are shown only in the > range [-90, 90] whereas the componnents of the contact's normal ny and > nz ranges both in [-1, 1]. > I think that the force interactions belonging to the side [90, 270] are > superposed with these belonging to [-90, 90] (because the division of > nz/ny which gives a positive value when nz and ny are both negative for > example). > > Actually we expect some symmetry in such presentation but it still > confusing.
I don't know the script ScriptPlotInteractionForcesHistogram, but your right there is a symmetry because contacts are characterized by a direction but not a sense: for instance contacts with a direction equal to 10 deg are equivalent to contacts with a direction 10+180=190 deg > > In addition, for my study case I displayed the interaction forces > histogram and I found that I have an important interaction forces > concentration near the angles 0, 90 and -90. Can somebody tell what is > the problem ?? Your problem may be the following one: For perfectly smooth walls, sphere-wall contacts are normal to the walls, that can lead to a more important number of contacts in directions 0, 90, 180 and 270 deg. To avoid this problem, you need to discard sphere-wall contacts when you plot contact direction histograms. Best Luc > > > > > > > > > > > > > > > > > > > > > > _______________________________________________ >> Mailing list: https://launchpad.net/~yade-users >> Post to : [email protected] >> Unsubscribe : https://launchpad.net/~yade-users >> More help : https://help.launchpad.net/ListHelp > > > _______________________________________________ > Mailing list: https://launchpad.net/~yade-users > Post to : [email protected] > Unsubscribe : https://launchpad.net/~yade-users > More help : https://help.launchpad.net/ListHelp > _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
