> > thank you very much! So i will try it first with the PWaveTimeStep and > add PWaveTimeStep later to compare the results. > > But now i'm interested in the option to set dt manually, where can i > find some advices to do it in this way? Because i didn't find so many > formulas for FrictMat_FrictPhys in the documentation to calculate > different things for it! >
For the case of FrictMat_FrictPhys it is mentioned in [1]. The critical time step for discrete systems (mass spring systems), which Yade actually simulate, is given by dT = sqrt( M / k_N ) where M=density*4/3.*pi*r*r*r is mass of the particle and k_N [N/m] normal stiffness of contacts / interactions / bonds. Specifically for Frict_phys it is (according to [1] ) k_N = 2*young*r good luck and if you have more questions, just ask :-) Jan [1] https://yade-dem.org/doc/formulation.html#estimation-of-by-wave-propagation-speed
_______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
