OK, for following results of further calculations the shear modulus is always 3e7 and poisson ratio is always 0.3. Note also, that viscous damping in shear direction doesnt influence the flyback_height. initial height is always 0.133
case 1: no local damping, viscous damping normal = 0.015 YADE: flyback_height = 0.1198912649 PFC (notension on): flyback_height = 0.12361 PFC (notension off): flyback_height = 0.12354 case2: local damping = 0.01, no viscous damping YADE: flyback_height = 0.127960977322 PFC (notension on): flyback_height = 0.12769 PFC (notension off): flyback_height = 0.12769 case3: no damping at all YADE: flyback_height = 0.133156194762 PFC (notension on): flyback_height = 0.1329 PFC (notension off): flyback_height = 0.1329 ...hope it helps ... I do not understand where the attractive force (in PFC notension off) comes from, but the influence on the results is very low (see case1). What is default in YADE, notension on or off? Christian -- You received this bug notification because you are a member of Yade developers, which is the registrant for Yade. https://bugs.launchpad.net/bugs/806944 Title: different behavoir of Hertz model while comparing PFC and YADE Status in Yet Another Dynamic Engine: New Bug description: Hello, During verifiing my model I compared output from PFC 4.0 with the output from YADE (bzr2877 on Debian Squeeze 64bit). There I found a different behavior between these two programs. I dont know if this is a bug or not, but I hope someone can explain the different behavior. The model itself is very simple. There are two spheres, an upper one and a lower one. The lower one is fixed and the upper one is falling down to the lower one, collides and jumps back. The value of interest is the flyback height of the upper particle. In PFC I measure higher values of flyback height, then in YADE (see log-files in the attachment). Can someone tell me why there is a difference in the flyback height? (input parameters are the same for both programs ... see caller_two-spheres-jumping.dat for PFC and two-spheres.py for YADE) Regards, Christian Jakob To manage notifications about this bug go to: https://bugs.launchpad.net/yade/+bug/806944/+subscriptions _______________________________________________ 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
