> A reference for this global damping can be found in PFC3d manual > (chapter Theory and background) where they propose: > > Fdi=-λ|Fi|sgn(vi) (***) Didn't you make some mistake? In Yade, sgn(Fᵢvᵢ') is + if they have the same direction and - if opposite. sgn(vi) would be + if moving +x and - if moving -x...? I suppose you meant Fdi=-λ Fi sgn(Fi vi) ?
> so basically the same as in Yade (**). The two formulations act > exactly in the same manner (they oppose the motion), I suppose that is > just a matter of efficiency to choose the (**) equivalent to (***). I downladed demo of PFC3D to have the manual but I am unable to extract it from the MSI installer file. Some day I will get ot windows machine and will get it officially ;-) Thanks, v. _______________________________________________ Mailing list: https://launchpad.net/~yade-dev Post to : yade-dev@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-dev More help : https://help.launchpad.net/ListHelp
