Re: [Yade-users] [Question #700813]: Batch run and run alone get different results
Question #700813 on Yade changed: https://answers.launchpad.net/yade/+question/700813 Status: Needs information => Open Ziyu Wang gave more information on the question: Hi Jan >Try without any -j or --job-threads (i.e. using one core for both cases) As you said, I have run yadedaily-batch twice and yadedaily separate twice using one core(with the same parameters).However,the results obtained are consistent with those before, and there is still a large gap between the two. >just to be sure, do you use same young parameter for both yadedaily and >yadedaily-batch? Yes,I use the same young(3000e9) for both.And all the parameters are same.The results(stress and strength) I mentioned are also obtained from the simulation of the same parameters. Thanks for help. -- 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 #700761]: about measure seepage discharge in triaxial test
Question #700761 on Yade changed: https://answers.launchpad.net/yade/+question/700761 Ziyu Wang gave more information on the question: Hello,everyone. I tried changing flow.permeabilityFactor to a positive value and other values.However,It seems that the data I record is always constant( flow.getBoundaryFlux(4) and (5) ). In my understanding, with the increase of axial pressure in the process of triaxial compression, the permeability will change, which should not be a constant value. How to deal with it? Thanks. -- 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 #700793]: About the "WallStresses_triax_base_" file in script-session1.py
Question #700793 on Yade changed: https://answers.launchpad.net/yade/+question/700793 Status: Open => Solved CESAR FELIPE JIMENEZ SANTIAGO confirmed that the question is solved: Hi Jerome, Thank you for your answer. It's solved -- 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 #700847]: access friction and inelastic collision contributions in the total loss of energy of the system
Question #700847 on Yade changed: https://answers.launchpad.net/yade/+question/700847 Status: Open => Answered Jan Stránský proposed the following answer: Hello, > Is there a way to access the friction energy dissipation contribution? see [1,2] > and the impact energy dissipation? You have (possibly constant) total energy Etot. You can compute kinetic energy Ekin [3], elastic energy Eel [4], energy dissipated by friction [1,2] The rest is other dissipation Eother. Etot = Eel + Ekin + Efrict + Eother Or you can use O.energy [5,6,7], where you can get other values if Law2 implements it. O.energy also stores artificial dissipation of newton integrator numerical damping. You can compare both approaches :-) > loss by inelastic collisions Note that for your case (only Law2_ScGeom_FrictPhys_CundallStrack), theoretically the only dissipation is only by friction and the numerical damping of newton integrator (there are no true "inelastic collisions") Cheers Jan [1] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Law2_ScGeom_FrictPhys_CundallStrack.plasticDissipation [2] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Law2_ScGeom_FrictPhys_CundallStrack.traceEnergy [3] https://yade-dem.org/doc/yade.utils.html#yade._utils.kineticEnergy [4] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Law2_ScGeom_FrictPhys_CundallStrack.elasticEnergy [5] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Omega.energy [6] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Omega.trackEnergy [7] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.EnergyTracker -- 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 #700788]: performing wetting condition on Twophaseflow engine
Question #700788 on Yade changed: https://answers.launchpad.net/yade/+question/700788 Status: Open => Solved Hossein confirmed that the question is solved: Problem Solved -- 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 #700843]: Difference between the internal friction angle of material and the interparticle friction angle?
Question #700843 on Yade changed: https://answers.launchpad.net/yade/+question/700843 Status: Answered => Solved Chien-Cheng Hung confirmed that the question is solved: Thanks Jérôme Duriez, 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 #700843]: Difference between the internal friction angle of material and the interparticle friction angle?
Question #700843 on Yade changed:
https://answers.launchpad.net/yade/+question/700843
Status: Open => Answered
Jérôme Duriez proposed the following answer:
Above [1] and [2] point to a contact property between 2 Discrete
Elements, that's it.
If you take any DEM paper from the literature with some macro-scale
shear strength considerations (e.g. triaxial testing), and compare the
deduced material friction angle (e.g. Mohr-Coulomb criterion friction
angle) with that contact property you will see how different both can be
(except in few instances where you would be very lucky -- or unlucky --
and get an equality between the two).
See e.g.
https://www.sciencedirect.com/science/article/pii/S0266352X21005309
where Mohr Coulomb friction angle is above 35 degrees, vs a contact
friction angle at 31° for a polyhedron model ("Set 2 parameters" in
Table 5).
Most convincing example would certainly be your own YADE simulations of
triaxial tests, with zero FrictMat.frictionAngle.
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Re: [Yade-users] [Question #700830]: Is there any way to generate voronoi tessellation diagram?
Question #700830 on Yade changed: https://answers.launchpad.net/yade/+question/700830 Status: Needs information => Answered Bruno Chareyre proposed the following answer: Hi, The image [1] was generated semi-automatically with POV-ray, using data generated collected from FlowEngine. There is no builtin function for doing that in Yade directly. It seems your question has two sides: 1/ how to get the data 2/ how to display it For 1/, it's pretty easy in C++ to iterate on the triangulation's facets and output a dual segment for each (one branch in Voronoi), but there is currently no python wrapping for such operation in TesselationWrapper. You may need to code a little within TessealationWrapper, or switch to FlowEngine. I can advise a bit more if needed. For 2/, it is up to you. I'm not quite sure POV-ray still works on modern systems. There could be other softwares doing 3D rendering. There's paraview but I'm not sure precisely how to achieve [1] in paraview. Blender is another one but I have no experience. Bruno -- 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 #700843]: Difference between the internal friction angle of material and the interparticle friction angle?
Question #700843 on Yade changed: https://answers.launchpad.net/yade/+question/700843 Status: Needs information => Open Chien-Cheng Hung gave more information on the question: Hi Jan, Sorry, let me make it clear. As far as I know, the friction angle we assign or modify in [1] and [2] stands for the internal friction angle of the material. In the meanwhile, these two parameters also represent the interparticle friction angle that describes the contact friction between particles. I happened to see Luc's comment in [3] saying not to mix up the internal friction angle of material and the interparticle friction angle which I think are the same thing based on my understanding. So I would like to ask whether the values in [1] and [2] can also be considered as the interparticle friction coefficient? Cheers, Chien-Cheng [1] https://yade-dem.org/doc/yade.wrapper.html?highlight=frictionangle#yade.wrapper.FrictMat.frictionAngle [2] https://yade-dem.org/doc/yade.utils.html?highlight=setcontactfriction#yade._utils.setContactFriction [3] https://answers.launchpad.net/yade/+question/678523 -- 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 #700611]: TwoPhaseFlow - double free or corruption
Question #700611 on Yade changed: https://answers.launchpad.net/yade/+question/700611 Status: Open => Needs information Bruno Chareyre requested more information: Oh... but I thought the question was about "large number of particles". Now it's about "packs". what do these packs look like? Would they contain overlapping spheres? B -- 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 #700847]: access friction and inelastic collision contributions in the total loss of energy of the system
New question #700847 on Yade: https://answers.launchpad.net/yade/+question/700847 Dear all, Is there a way to access the friction energy dissipation contribution? and the impact energy dissipation? Or to put in other words, the energy that is loss by friction and the energy that is loss by inelastic collisions? I am using yade 2018b. And I am using the following engines with integrators/laws: O.engines = [ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()],label='collider'), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom(),Ig2_Facet_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys(label='frict')], [Law2_ScGeom_FrictPhys_CundallStrack(traceEnergy=True,label='cundall')], ), GravityEngine(gravity=(0,0,-9.8)), NewtonIntegrator(damping=dampingCoeffCundall,label='newtonInt'), TranslationEngine(translationAxis=[0,0,1],velocity=velocityDamp,ids=idTop,dead=False,label='translat'), TranslationEngine(translationAxis=[0,0,1],velocity=velocityDamp,ids=idWalls,dead=False,label='translatbottom'), TranslationEngine(translationAxis=[0,0,1],velocity=velocityDamp,ids=idBottom,dead=False,label='translatBottom'), HarmonicMotionEngine(A=amplitude, f=frequency , fi = initialPhase, ids = idTop, label='combEngine',dead=True), HarmonicMotionEngine(A=amplitude, f=frequency , fi = initialPhase, ids = idWalls, label='combEngine1',dead=True), HarmonicMotionEngine(A=amplitude, f=frequency , fi = initialPhase, ids = idBottom, label='combEngine2',dead=True), ] Thank you in advance! -- 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 #700843]: Difference between the internal friction angle of material and the interparticle friction angle?
Question #700843 on Yade changed: https://answers.launchpad.net/yade/+question/700843 Status: Open => Needs information Jan Stránský requested more information: Hello, please provide more information [2]. What is "internal friction angle of material"? Yade material value? Yade overall macroscopic value? Parameter of a real material? ... ? What is "interparticle friction angle"? Some Yade value? Or a value of real particles? Or ... ? Cheers Jan [2] 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
Re: [Yade-users] [Question #700815]: access individual energy contribution from each particle
Question #700815 on Yade changed: https://answers.launchpad.net/yade/+question/700815 Status: Open => Solved rox212 confirmed that the question is solved: Thanks Jérôme Duriez, 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 #678523]: frictionAngle vs μ(interparticle friction coefficient)
Question #678523 on Yade changed: https://answers.launchpad.net/yade/+question/678523 Chien-Cheng Hung posted a new comment: Okay, I will open a new question. Thanks! Chien-Cheng -- 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 #700843]: Difference between the internal friction angle of material and the interparticle friction angle?
New question #700843 on Yade: https://answers.launchpad.net/yade/+question/700843 Hi all, According to the comments in [1], Luc mentioned not to mix up the internal friction angle of a material and the interparticle friction angle. I was wondering what the differences are between these two parameters. Looking forward to getting your answer. [1] https://answers.launchpad.net/yade/+question/678523 Cheers, Chien-Cheng -- 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 #700815]: access individual energy contribution from each particle
Question #700815 on Yade changed: https://answers.launchpad.net/yade/+question/700815 Status: Answered => Open rox212 is still having a problem: Dear Jan, Thank you for your answer! Hope this is enough: Yade version: 2018.02b My O.engines are: O.engines = [ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()],label='collider'), InteractionLoop( [Ig2_Sphere_Sphere_ScGeom(),Ig2_Facet_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys()], [Law2_ScGeom_FrictPhys_CundallStrack()], ), GravityEngine(gravity=(0,0,-9.8)), NewtonIntegrator(damping=dampingCoeffCundall,label='newtonInt'), TranslationEngine(translationAxis=[0,0,1],velocity=velocityDamp,ids=idTop,dead=False,label='translat'), TranslationEngine(translationAxis=[0,0,1],velocity=velocityDamp,ids=idWalls,dead=False,label='translatbottom'), TranslationEngine(translationAxis=[0,0,1],velocity=velocityDamp,ids=idBottom,dead=False,label='translatBottom'), HarmonicMotionEngine(A=amplitude, f=frequency , fi = initialPhase, ids = idTop, label='combEngine',dead=True), HarmonicMotionEngine(A=amplitude, f=frequency , fi = initialPhase, ids = idWalls, label='combEngine1',dead=True), HarmonicMotionEngine(A=amplitude, f=frequency , fi = initialPhase, ids = idBottom, label='combEngine2',dead=True), ] > In principle it should/could be possible by storing interaction and body values and comparing them between individual iterations. Is there an example to do this? Thank you for your time and help! -- 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 #700815]: access individual energy contribution from each particle
Question #700815 on Yade changed: https://answers.launchpad.net/yade/+question/700815 Status: Needs information => Answered Jérôme Duriez proposed the following answer: Hi, Related recent threads: https://answers.launchpad.net/yade/+question/700748 and https://answers.launchpad.net/yade/+question/700181 I a nutshell, you will most probably have to do it by yourself, this is not a functionality already present in YADE. Good news is that you can do by yourself anything you want in YADE -- 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 #700830]: Is there any way to generate voronoi tessellation diagram?
Question #700830 on Yade changed: https://answers.launchpad.net/yade/+question/700830 Status: Open => Needs information Jan Stránský requested more information: Hello, > I'd like to generate voronoi tessellation diagram Do you need nubers, of picture? From what input would you like to generate it? Particle centers? > I tried the TW.defToVtk() and got Delaunay triangulation diagram but not voronoi tesselation diagram. They are dual, one uniquely determines the other, so if you have Delaunay triangulation, creating Voronoi tesselation is "easy". > It seems the voro++[2] is what I am looking for, but the result seems not good because I didn't see any spheres. I don't know voro++, but if I remember correctly, Paraview could do this. If not natively, you can always create the Voronoi diagram and "manually" display the lines together with spheres. Cheers Jan -- 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 #700815]: access individual energy contribution from each particle
Question #700815 on Yade changed: https://answers.launchpad.net/yade/+question/700815 Status: Open => Needs information Jan Stránský requested more information: Hello, please read [1] and provide a MWE or at least what Ip2/Law2 you are using. The answer strongly depends on it. In principle it should/could be possible by storing interaction and body values and comparing them between individual iterations. 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
Re: [Yade-users] [Question #700800]: simulate rectangular lastic
Question #700800 on Yade changed: https://answers.launchpad.net/yade/+question/700800 Status: Open => Needs information Jan Stránský requested more information: Hello, > I am beginner in yade welcome :-) > I want to simulate rectangle slices rubber and circle sand but l don't know how to simulate rectangular rubber in yade . please read [1] and provide (much much) more information. For example: - what is your background, where do/did you study, where, do you work ... ? - what is this task about? short-term industrial project? Topic for full PhD thesis? ... ? - why you want to use Yade (or DEM in general). Rubber as is sounds more suitable for FEM or similar methods. - what about rubber you want to simulate. manufacturing? elastic bending? tension with cracking? . ? - what are general dimensions of the simulation (specimen size, time of the simulated event) - what is "circle sand"? It is very ambiguous, I can imagine more very different interpretations (circular particles, the domain is circular, ...) - what is "rectangle slices rubber"? (same as 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
Re: [Yade-users] [Question #700813]: Batch run and run alone get different results
Question #700813 on Yade changed: https://answers.launchpad.net/yade/+question/700813 Status: Open => Needs information Jan Stránský requested more information: Try without any -j or --job-threads (i.e. using one core for both cases) > I have run the same parameters twice using batch mode just to be sure, do you use same young parameter for both yadedaily and yadedaily-batch? It is not mentioned, only mentioned is content of young.txt, were are various values.. Cheers Jan -- 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
