Question #699135 on Yade changed: https://answers.launchpad.net/yade/+question/699135
Status: Answered => Open Leonard is still having a problem: Hi Jan, Thanks for your reply. >>Why do you want to reduce average particle velocity? I want to make an attempt to look at the wave propagation on a sand packing, by modelling bender element test. I.e., a part of particles are treated as the transducer (whose velocity is controlled by the input signal), and a part of particles are treated as receiver (whose velocity are monitored during the process). As it is generally mentioned, for instance see section 3.2 in [1] and section 2.2 in [2], the input amplitude velocity is a small value (e.g., 1e-3 m/s) which preserves a very small strain regime, reducing average particle velocity allows us investigating the wave propagation with less effect from the original velocity of particles. Thereby, before the wave propagation test,a relaxation stage was conducted to remove kinetic energy of particles and hold the stress state stably. >>b.state.vel *= someFactor # possibly 0 Yes, if I understand correctly, using this way can fully control the velocity of particles, but the velocity of these particles will not be affected (i.e., the velocity is unchanged), which is not suitable for the case I described above. Do you have any ideas to remove kinetic energy/ reduce velocity of particles? Thanks Leonard [1]Tang, X., and J. Yang. "Wave propagation in granular material: What is the role of particle shape?." Journal of the Mechanics and Physics of Solids 157 (2021): 104605. [2]Li, Yang, Masahide Otsubo, and Reiko Kuwano. "DEM analysis on the stress wave response of spherical particle assemblies under triaxial compression." Computers and Geotechnics 133 (2021): 104043. -- You received this question notification because your team yade-users is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : yade-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp