kan napsal(a): > Hey, guys, > > I have a problem to get the critical timestep, could you please give > me hand? > if I need to calculate the critical time step for each time steps, how > can I calculate it? > From papers, I found that equation is: > critical_time_step=2*sqrt(mass/k), Bruno, how does this value compare to critical timestep calculated from elastic wave propagation speed along the particle calculated for cotinuum, i.e. , which is 2*particle diameter / sqrt(Young's modulus / density)? I would assume it underestimates the timestep, but may have the advantage that it has to be evaluated only once, since contact stiffnesses are derived (for purely linear elastic contacts) from the same values.
I use this formula for preliminary estimation of computation time for a simulation. Regards, Vaclav _______________________________________________ Yade-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/yade-users
