Re: [Yade-users] [Question #693506]: How to get tension force of a cohesive contact
Question #693506 on Yade changed: https://answers.launchpad.net/yade/+question/693506 Status: Answered => Solved Leonard confirmed that the question is solved: Thanks Jan Stránský, that solved my question. -- 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
Re: [Yade-users] [Question #693455]: addForce didnt work for facet
Question #693455 on Yade changed: https://answers.launchpad.net/yade/+question/693455 onyourself confirmed that the question is solved: Thanks Jan Stránský, that solved my question. -- 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
Re: [Yade-users] [Question #693455]: addForce didnt work for facet
Question #693455 on Yade changed: https://answers.launchpad.net/yade/+question/693455 Status: Answered => Solved onyourself confirmed that the question is solved: thanks, jan, that solved my problem. -- 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
Re: [Yade-users] [Question #693550]: Relative Density
Question #693550 on Yade changed: https://answers.launchpad.net/yade/+question/693550 Status: Open => Needs information Jan Stránský requested more information: Hello, first of all, please read [1] > How can I ... please be (much) more specific. - Why do you want to control it? - At what circumstances (initial packing, during simulation)? - ... > control what does "control" mean? check (get)? prescribe? > in a script do you have any specific script, or is it just a general question? > Is relDensity good? depends on "control", see above cheers Jan [1] https://www.yade-dem.org/wiki/Howtoask -- 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
[Yade-users] [Question #693550]: Relative Density
New question #693550 on Yade: https://answers.launchpad.net/yade/+question/693550 How can I control Relative Density in a script? Is relDensity good? https://www.yade-dem.org/doc/yade.pack.html?highlight=reldensity#yade._packSpheres.SpherePack.relDensity -- 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
Re: [Yade-users] [Question #693506]: How to get tension force of a cohesive contact
Question #693506 on Yade changed: https://answers.launchpad.net/yade/+question/693506 Status: Open => Answered Jan Stránský proposed the following answer: Yes, the same sign w.r.t. tension/compression of i.phys.normalForce.dot(i.geom.normal) is the same for all contacts. There is no "direction of compression" (recall action-reaction law). The direction of contact normal (if it is from body A to body B or from B to A) is arbitrary, more precisely chosen by collider "randomly" (i.e. non-trivially). But, the value of internal force (tension/compression) is determined by the given normal convention, as forces on bodies are usually computed from i.phys.normalForce, assigned positive to one body, but negative to the other body. The resultant forces on bodies must be independent of the choice A->B / B->A. See e.g. [1], similarly it is done in other laws. So if you swapped body1 and body2 of the contact (i.geom.normal would be negated), i.phys.normalForce would need to be negated, too, to preserve the consistency of formula [1] cheers Jan [1] https://gitlab.com/yade- dev/trunk/-/blob/master/pkg/dem/ElasticContactLaw.cpp#L116 -- 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
Re: [Yade-users] [Question #693506]: How to get tension force of a cohesive contact
Question #693506 on Yade changed: https://answers.launchpad.net/yade/+question/693506 Leonard posted a new comment: Hi Jérôme, Yes, thanks for your reminder! Leonard -- 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
Re: [Yade-users] [Question #693506]: How to get tension force of a cohesive contact
Question #693506 on Yade changed: https://answers.launchpad.net/yade/+question/693506 Status: Answered => Open Leonard is still having a problem: Hi Jan, I test your idea with two particles which works really fine! I just have a question: For example, for one interaction in the model, i.phys.normalForce.dot(i.geom.normal) is positive which represents that it is compressive, does this apply for all the other interactions in the model? I.e., for other interactions whose i.phys.normalForce.dot(i.geom.normal) is positive, is the force compressive as well? I have this question because in my impression, the direction of contact normal unit vector "n" is arbitrary, not always orientates to the direction of compression. Thanks Leonard -- 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
Re: [Yade-users] [Question #693542]: Conveyor factory with periodic packing
Question #693542 on Yade changed: https://answers.launchpad.net/yade/+question/693542 Status: Needs information => Answered Jan Stránský proposed the following answer: Hello, You have several options: - as suggested by Robert, implement the particle creation "manually" (search O.bodies.append, PyRunner etc.) - using existing features - see examples [1,2,3] (also available in the source code in "examples" directory) cheers Jan [1] https://gitlab.com/yade-dev/trunk/-/blob/master/examples/spheresFactory.py [2] https://gitlab.com/yade-dev/trunk/-/blob/master/examples/hourglass/hourglass.py [3] https://gitlab.com/yade-dev/trunk/-/blob/master/examples/packs/packs.py -- 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
Re: [Yade-users] [Question #693542]: Conveyor factory with periodic packing
Question #693542 on Yade changed: https://answers.launchpad.net/yade/+question/693542 Status: Open => Needs information Robert Caulk requested more information: Hello, Are you sure "he" is using periodic boundary conditions? If so, how do you know? Is there a script for this video? Also, we typically request that people do not post external links [1] like this. >So, is there a similar method in Yade that can achieve continuous particles flow? You can create particles at any time/location that you wish using the basic python interface [2]. [1] https://www.yade-dem.org/wiki/Howtoask [2] https://yade-dem.org/doc/introduction.html Cheers, Robert -- 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
[Yade-users] [Question #693542]: Conveyor factory with periodic packing
New question #693542 on Yade: https://answers.launchpad.net/yade/+question/693542 Hi everyone, In this video[1], he simulated a conveying factory with WooDEM. It seems that he used 'periodic packing' method to continuously generate particles. I have looked examples of Periodic Boundaries in yade, but did not find a similar method. So, is there a similar method in Yade that can achieve continuous particles flow? I will appreciate your help in answering my questions. Thank you, Peter [1] https://www.youtube.com/watch?v=-Q81oGxoz_s -- 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
