Re: [Yade-users] [Question #700315]: Open MPI - spawn processes

Question #700315 on Yade changed: https://answers.launchpad.net/yade/+question/700315 Bruno Chareyre posted a new comment: Hi, for clarity: - did you compile openmpi with intel or gcc? - then do you use that with singularity or with yade compiled on the cluster? Bruno -- You received

Re: [Yade-users] [Question #700315]: Open MPI - spawn processes

Question #700315 on Yade changed: https://answers.launchpad.net/yade/+question/700315 Bruno Chareyre posted a new comment: A walkthrough of Intel compilation would be valuable, especially if it's less trivial than just changing the compiler (it needs linkage to more dynamic libraries iirc

Re: [Yade-users] [Question #700434]: InsertionSortCollider SortAxis : does axis choice make a difference to speed?

Question #700434 on Yade changed: https://answers.launchpad.net/yade/+question/700434 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, in a scene which is very elongated along Y-axis it could increase performance a little to choose Y as the first sorting a

Re: [Yade-users] [Question #700411]: Aborted (core dumped) occured when I use the Hertz-Minlin contact law with non-zero krot and eta

Question #700411 on Yade changed: https://answers.launchpad.net/yade/+question/700411 Bruno Chareyre posted a new comment: > the time step suddenly drops to 0 Zero exactly? -- You received this question notification because your team yade-users is an answer contact for Y

Re: [Yade-users] [Question #700164]: External Moving Object using MPI

Question #700164 on Yade changed: https://answers.launchpad.net/yade/+question/700164 Status: Open => Answered Bruno Chareyre proposed the following answer: Ah indeed, it's not easy to find: examples/DEM2020Benchmark/Case2_rotating_drum_mpi.py B. -- You received this question notificat

Re: [Yade-users] [Question #700213]: PeriTriaxController not initiating next stage

Question #700213 on Yade changed: https://answers.launchpad.net/yade/+question/700213 Bruno Chareyre proposed the following answer:  > # allow faster deformation along x,y to better maintain stresses  > triax.maxStrainRate = (0, 0, 0.005) 0 is faster? ;) B -- You received this qu

Re: [Yade-users] [Question #700164]: External Moving Object using MPI

Question #700164 on Yade changed: https://answers.launchpad.net/yade/+question/700164 Bruno Chareyre posted a new comment: Hi, sorry for late reply. I don't have time to investigate this in details at the moment, but you seem to be pretty close to the rotating drum MPI-example. Maybe checking

Re: [Yade-users] [Question #700315]: Open MPI - spawn processes

Question #700315 on Yade changed: https://answers.launchpad.net/yade/+question/700315 Bruno Chareyre requested more information: Is it a cluster you're admin of? -- You received this question notification because your team yade-users is an answer contact for Yade

Re: [Yade-users] [Question #700411]: Aborted (core dumped) occured when I use the Hertz-Minlin contact law with non-zero krot and eta

Question #700411 on Yade changed: https://answers.launchpad.net/yade/+question/700411 Bruno Chareyre posted a new comment: Hi, It could be that a high torsional stiffness needs a smaller timestep, so that you get a classical numerical instability if you keep it the same

Re: [Yade-users] yade website pb.

Still not fixed, I'm sorry, but here's an update: I found that the security barriers of Chromium were lower than those of Firefox. The site is actually accessible with the former - and probably other browsers too. Bruno On 20/01/2022 12:05, Bruno Chareyre wrote: Dear all, We are updating

[Yade-users] yade website pb.

Dear all, We are updating a certificate on yade server and right now the site is not accessible. It should be fixed quickly. In the meantime you can browse the documentation offline like this: /apt install yadedaily-doc// //firefox /usr/share/doc/yadedaily-doc/html/index.html &/ Regards

Re: [Yade-users] [Question #700102]: getSaturation - 2PFV

Question #700102 on Yade changed: https://answers.launchpad.net/yade/+question/700102 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, I'm afraid the code is the only documentation right now. Any example script? Bruno -- You received this question notificat

Re: [Yade-users] [Question #699998]: How to simulate small-strain triaxial compression test

Question #68 on Yade changed: https://answers.launchpad.net/yade/+question/68 Bruno Chareyre posted a new comment: Transitioning between phases is often based on the ubalanced force (see "stabilityThreshold=0.01"). That's basically a residual amount of dynamic noise we acce

Re: [Yade-users] [Question #700031]: postprocessing data with tassellationWrapper

Question #700031 on Yade changed: https://answers.launchpad.net/yade/+question/700031 Bruno Chareyre posted a new comment: Hi, Just a quick comment. "Not seeing distinct features" is somewhat expected in most cases. Persistent shear bands are never fully persistent and always a bit

Re: [Yade-users] [Question #699838]: SWRC curve for fine-grained soil

Question #699838 on Yade changed: https://answers.launchpad.net/yade/+question/699838 Status: Open => Answered Bruno Chareyre proposed the following answer: > I guess the main problem is in terms of pore network which is not well molded since the PSD couldn't match with the real PSD I

[Yade-users] New bibliograpĥic reference for Yade (please update your database)

vite you all to consider contributing to yade if you have written something which may be used by others. Best Regards Bruno Chareyre [1] https://www.yade-dem.org/doc/citing.html -- ___ Bruno Chareyre Associate Professor 3SR lab., ENSE³, Grenoble INP Tél : +33 4 56 52 86 21 __

Re: [Yade-users] [Question #679515]: How to have a constant-p simulations with periodic boundary condition?

Question #679515 on Yade changed: https://answers.launchpad.net/yade/+question/679515 Bruno Chareyre posted a new comment: Hi, You need to write a servo-control loop since ultimately the velocity gradient is the only thing you can really impose. Typically: impose strain rate in one direction

Re: [Yade-users] [Question #699428]: Cannot simulate periodic box with walls

Question #699428 on Yade changed: https://answers.launchpad.net/yade/+question/699428 Bruno Chareyre posted a new comment: Hi Danny, I didn't read all posts in details but I suspect Jan already suggested how to proceed: insert boxes and impose their velocities. Meanwhile the periodic cell should

Re: [Yade-users] [Question #698754]: Making video of pfacet clump: clump falling apart

Question #698754 on Yade changed: https://answers.launchpad.net/yade/+question/698754 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, this ugly hack works for me. Depending on the latency of the OS you may have to adjust the sleep() times. I'm considering add

Re: [Yade-users] [Question #698825]: Yade-batch is being indeterministic

Question #698825 on Yade changed: https://answers.launchpad.net/yade/+question/698825 Bruno Chareyre requested more information: Hi, This is intriguing. You can print this from within the script to be sure: print("OMP_NUM_THREADS=",os.environ['OMP_NUM_THREADS'] ) Then inspect the

Re: [Yade-users] [Question #698388]: MPI with Clumps Particles

Question #698388 on Yade changed: https://answers.launchpad.net/yade/+question/698388 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, I can imagine why it fails. Do you confirm the problem without the motion engines? Possible directions for solving the problem

Re: [Yade-users] [Question #697642]: Many errors with PeriodicFlowEngine

Question #697642 on Yade changed: https://answers.launchpad.net/yade/+question/697642 Status: Open => Answered Bruno Chareyre proposed the following answer: > I tried to modify my code, but it failed. I don't know what's wrong with it. I was wondering if you can help me. This

Re: [Yade-users] [Question #697642]: Many errors with PeriodicFlowEngine

Question #697642 on Yade changed: https://answers.launchpad.net/yade/+question/697642 Status: Open => Answered Bruno Chareyre proposed the following answer: > I delete partilces in the code: Indeed, my bad. > According to your prompt, I run my code without deleting

Re: [Yade-users] [Question #697642]: Many errors with PeriodicFlowEngine

Question #697642 on Yade changed: https://answers.launchpad.net/yade/+question/697642 Status: Open => Needs information Bruno Chareyre requested more information: Do you confirm that the older engine is replaced after this (the indices 3 &4 where just random examples in my post)? Al

Re: [Yade-users] [Question #697642]: Many errors with PeriodicFlowEngine

Question #697642 on Yade changed: https://answers.launchpad.net/yade/+question/697642 Status: Open => Answered Bruno Chareyre proposed the following answer: Just replace it with a new one in O.engines. Something like: O.engines = O.engines[:3]+FlowEngine()+O.engines[4:] B -- You recei

Re: [Yade-users] [Question #697642]: Many errors with PeriodicFlowEngine

Question #697642 on Yade changed: https://answers.launchpad.net/yade/+question/697642 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, removing particles is not expected with flow engine. I think the simplest solution is to delete the previous FlowEngine af

Re: [Yade-users] [Question #697526]: CHOLMOD warning: matrix not positive definite

Question #697526 on Yade changed: https://answers.launchpad.net/yade/+question/697526 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, It can happen that LDL fails for numerical reason, then the solver switches to LDLt, which is more stable. I _could_ be a s

Re: [Yade-users] [Question #697249]: extMaterial in cylinderConnection gridpfacet.py not used

Question #697249 on Yade changed: https://answers.launchpad.net/yade/+question/697249 Bruno Chareyre proposed the following answer: https://gitlab.com/yade- dev/trunk/-/commit/f9335f8a34cfdcccb90a7fce5d16893aaf43166b Should be merged soon. Thanks for pointing this out. Bruno -- You received

Re: [Yade-users] [Question #697238]: SnapshotEngine doesn't work

Question #697238 on Yade changed: https://answers.launchpad.net/yade/+question/697238 Bruno Chareyre posted a new comment: I'll look into it. Thank you Jan for the hints. Bruno -- You received this question notification because your team yade-users is an answer contact for Yade

Re: [Yade-users] [Question #697249]: extMaterial in cylinderConnection gridpfacet.py not used

Question #697249 on Yade changed: https://answers.launchpad.net/yade/+question/697249 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, The internal interactions use nodes material while the external interactions use connexion/pfacet materials. So (from the

Re: [Yade-users] [Question #697108]: Porosity overlapping particles

Question #697108 on Yade changed: https://answers.launchpad.net/yade/+question/697108 Status: Open => Answered Bruno Chareyre proposed the following answer: If you have no clear idea, I think best by default is to assume 4/3*πR^3 is still a good approximation for the volumes of the defor

Re: [Yade-users] [Question #697108]: Porosity overlapping particles

Question #697108 on Yade changed: https://answers.launchpad.net/yade/+question/697108 Status: Needs information => Answered Bruno Chareyre proposed the following answer: > I would define correct porosity as the total volume of void space in the compacts. Right. But what what

Re: [Yade-users] [Question #697195]: How to set the PeriodicFlowEngine

Question #697195 on Yade changed: https://answers.launchpad.net/yade/+question/697195 Bruno Chareyre proposed the following answer: As the name suggests, PeriodicFlowEngine is for periodic (no-)boundary condition. So no it is not really a "boundary" value problem. It is a periodic fie

Re: [Yade-users] [Question #697195]: How to set the PeriodicFlowEngine

Question #697195 on Yade changed: https://answers.launchpad.net/yade/+question/697195 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, 1/ No, if it is periodic there is just no walls. You simply impose a macroscopic pressure gradient. (well... it really depe

Re: [Yade-users] [Question #697174]: Facing problem with option in YADE that simulates grains similar to particle packing through Boundary contraction procedure in PFC 3D

Question #697174 on Yade changed: https://answers.launchpad.net/yade/+question/697174 Status: Open => Answered Bruno Chareyre proposed the following answer: Please check examples/triax-tutorial/script1.py, where the same engine is used to generate initial packing then apply deviato

Re: [Yade-users] [Question #697174]: Facing problem with option in YADE that simulates grains similar to particle packing through Boundary contraction procedure in PFC 3D

Question #697174 on Yade changed: https://answers.launchpad.net/yade/+question/697174 Status: Open => Answered Bruno Chareyre proposed the following answer: (sorry for sending earlier answer to users list, here it is) Hi, The problem is you parameters are extreme and the servo cont

Re: [Yade-users] [Question #697174]: Facing problem with option in YADE that simulates grains similar to particle packing through Boundary contraction procedure in PFC 3D

Hi, The problem is you parameters are extreme and the servo control of boundaries doesn't like that: Super-high stiffness with super low confinement. If you visualize interaction forces in the 3D view you can see that they keep blinking, that's because the walls struggle to maintain a constant

Re: [Yade-users] [Question #697104]: Contact angle FlowEngine

Question #697104 on Yade changed: https://answers.launchpad.net/yade/+question/697104 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, Indeed, TwoPhaseFlowEngine is assuming perfect wetting for now. It wouldn't be too difficult to generalize to any contact an

Re: [Yade-users] [Question #697108]: Porosity overlapping particles

Question #697108 on Yade changed: https://answers.launchpad.net/yade/+question/697108 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, I agree with Jérôme: this is a weird case. First question is: how would you define the "correct" porosity with wo

Re: [Yade-users] [Question #696906]: 3D view black

Question #696906 on Yade changed: https://answers.launchpad.net/yade/+question/696906 Status: Open => Answered Bruno Chareyre proposed the following answer: > Should I have a look to the driver of the graphic card ? I have no clue. :) B -- You received this question notification b

Re: [Yade-users] [Question #696480]: PFacet model - contact data mining

Question #696480 on Yade changed: https://answers.launchpad.net/yade/+question/696480 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi Paul, I did not check all details but here are quick answers. I would say the excess interactions you see are just virt

Re: [Yade-users] [Question #696906]: 3D view black

Question #696906 on Yade changed: https://answers.launchpad.net/yade/+question/696906 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi Raphaël, I would suspect graphic card or driver. Could you try the command "glxgears" (apt install mesa-utils)? Do

Re: [Yade-users] [Question #696648]: Image and erase

Question #696648 on Yade changed: https://answers.launchpad.net/yade/+question/696648 Bruno Chareyre proposed the following answer: Is #6 not enough to avoid the issue? I understand what you want is to produce an image without the wall, isn't it? Bruno -- You received this question

Re: [Yade-users] [Question #696704]: How to get P-wave and S-wave velocity

Question #696704 on Yade changed: https://answers.launchpad.net/yade/+question/696704 Bruno Chareyre proposed the following answer: Hi, PWave velocity is (bulk modulus /density)**0.5 with "modulus" and "density" defined at the macroscale. For density it is simply mat.d

Re: [Yade-users] [Question #696648]: Image and erase

Question #696648 on Yade changed: https://answers.launchpad.net/yade/+question/696648 Bruno Chareyre posted a new comment: Note: if you want to just "not show" (instead of "delete") you can also use this: In [2]: rr=yade.qt.Renderer()

Re: [Yade-users] [Question #696515]: How to use interactionDetectionFactor(>1) to create distance interactions in Ig2_Sphere_Sphere_ScGeom?

Question #696515 on Yade changed: https://answers.launchpad.net/yade/+question/696515 Bruno Chareyre proposed the following answer: Sorry for poor typing, here is the version with punctuation and less typos: I would say no. interactiondetectionfactor must be large enough to catch all meaningfull

Re: [Yade-users] [Question #696515]: How to use interactionDetectionFactor(>1) to create distance interactions in Ig2_Sphere_Sphere_ScGeom?

Question #696515 on Yade changed: https://answers.launchpad.net/yade/+question/696515 Status: Open => Answered Bruno Chareyre proposed the following answer: > their crosssection calculation still pi * Rmin ^ 2[8]? If so, is the value of radius should multiplied by interactiondetection

Re: [Yade-users] [Question #696604]: Spheres interactions in a clump

Question #696604 on Yade changed: https://answers.launchpad.net/yade/+question/696604 Status: Open => Needs information Bruno Chareyre requested more information: Hi, please post the script, not parts of it. https://yade-dem.org/wiki/Howtoask Bruno -- You received this quest

Re: [Yade-users] [Question #696598]: Deactivating NewtonIntegrator.gravity on just a group of particles in the model

Question #696598 on Yade changed: https://answers.launchpad.net/yade/+question/696598 Bruno Chareyre proposed the following answer: By order of performance I would say, probably: 1. add forces selectively 2. add counter-forces selectively 3. gravity engine #4 (it implies one more loop

Re: [Yade-users] [Question #696598]: Deactivating NewtonIntegrator.gravity on just a group of particles in the model

Question #696598 on Yade changed: https://answers.launchpad.net/yade/+question/696598 Bruno Chareyre proposed the following answer: Hi, > A simple workaround is to apply "opposite force" on "gravity-free" particles. Indeed. Or even set null gravity and assign weig

Re: [Yade-users] [Question #696515]: How to use interactionDetectionFactor(>1) to create distance interactions in Ig2_Sphere_Sphere_ScGeom?

Question #696515 on Yade changed: https://answers.launchpad.net/yade/+question/696515 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, I would say yes. It will calculate data needed for any functor coming later to the interaction later on. What _will_ be d

Re: [Yade-users] [Question #696376]: Contact between sphere-gridconnection not detected in a pfacet edge

Question #696376 on Yade changed: https://answers.launchpad.net/yade/+question/696376 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, Additional bugs could be discussed directly hre: https://gitlab.com/yade-dev/trunk/-/issues/210 Bruno -- You recei

Re: [Yade-users] [Question #696433]: kdevelop

Question #696433 on Yade changed: https://answers.launchpad.net/yade/+question/696433 Status: Open => Answered Bruno Chareyre proposed the following answer: > how I use YADE in/with kdevelop If "use" means to run a python script with yade to produce results then I don't k

Re: [Yade-users] [Question #696433]: kdevelop

Question #696433 on Yade changed: https://answers.launchpad.net/yade/+question/696433 Bruno Chareyre posted a new comment: Hi, your use case is not clear. What does it mean to "compile YADE kdevelop"? "I did not get any response", which response did you expect? "run the s

Re: [Yade-users] [Question #695558]: Dynamics of pfacet object does not appear to be correct

Question #695558 on Yade changed: https://answers.launchpad.net/yade/+question/695558 Status: Open => Answered Bruno Chareyre proposed the following answer: In fact when it is a new bug better start a new thread (if on launchpad), or even better report an "issue" directly on

Re: [Yade-users] [Question #695558]: Dynamics of pfacet object does not appear to be correct

Question #695558 on Yade changed: https://answers.launchpad.net/yade/+question/695558 Bruno Chareyre posted a new comment: Thanks. Re-posted here: https://gitlab.com/yade-dev/trunk/-/issues/214 Bruno -- You received this question notification because your team yade-users is an answer contact

Re: [Yade-users] [Question #696307]: Recompile Haustein Source code

Question #696307 on Yade changed: https://answers.launchpad.net/yade/+question/696307 Bruno Chareyre posted a new comment: I guess you wanted to thank Anton. Let us know if current source trunk code is not working. B -- You received this question notification because your team yade-users

Re: [Yade-users] [Question #696307]: Recompile Haustein Source code

Question #696307 on Yade changed: https://answers.launchpad.net/yade/+question/696307 Status: Open => Answered Bruno Chareyre proposed the following answer: You could try and reproduce Haustein's changes as shown in their repository. See [1] (first one in the list). What you want is to

Re: [Yade-users] [Question #696307]: Recompile Haustein Source code

Question #696307 on Yade changed: https://answers.launchpad.net/yade/+question/696307 Status: Open => Answered Bruno Chareyre proposed the following answer: So you confirm that the SoftwareX version as a feature that yade/trunk doesn't have? I didn't expect. In that case you sho

Re: [Yade-users] [Question #696307]: Recompile Haustein Source code

Question #696307 on Yade changed: https://answers.launchpad.net/yade/+question/696307 Status: Open => Answered Bruno Chareyre proposed the following answer: > Did you check if the feature was/not in latest versions before compiling that one? -- You received this question notifi

Re: [Yade-users] [Question #696307]: Recompile Haustein Source code

Question #696307 on Yade changed: https://answers.launchpad.net/yade/+question/696307 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, Since the code you link is not maintained it is expected that the build procedure will fail with newer systems at some po

Re: [Yade-users] [Question #696260]: yade container image 20.04 can't run on centos

Question #696260 on Yade changed: https://answers.launchpad.net/yade/+question/696260 Bruno Chareyre posted a new comment: Wow! Thanks for solution. It might help others. Another solution should be to use an older linux version [1]. They all have updated version if you use "yadedaily &quo

Re: [Yade-users] [Question #696270]: Is there a way to create a model with different permeabilities

Question #696270 on Yade changed: https://answers.launchpad.net/yade/+question/696270 Bruno Chareyre proposed the following answer: Yes (without changing source code): create a layer with a gradient in particle sizes. Bruno -- You received this question notification because your team yade

Re: [Yade-users] [Question #696260]: yade container image 20.04 can't run on centos

Question #696260 on Yade changed: https://answers.launchpad.net/yade/+question/696260 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, Thank you for reporting. I'm afraid it is a question for singularity/docker/centos devs, more than yade devs. Do you m

Re: [Yade-users] [Question #696228]: How to get a pressure boundary condition as triangle distribution by FlowEngine

Question #696228 on Yade changed: https://answers.launchpad.net/yade/+question/696228 Bruno Chareyre posted a new comment: > As we know, water pressure increases with depth. (Pressure=denstiy*g*depth) True, but the pressure in PFV implementation is not the absolute press

Re: [Yade-users] [Question #695558]: Dynamics of pfacet object does not appear to be correct

Question #695558 on Yade changed: https://answers.launchpad.net/yade/+question/695558 Status: Open => Answered Bruno Chareyre proposed the following answer: Ah... the clumping step is using positions+mass to deduce total mass and center of mass while "position" of the cylinder

Re: [Yade-users] [Question #695558]: Dynamics of pfacet object does not appear to be correct

Question #695558 on Yade changed: https://answers.launchpad.net/yade/+question/695558 Bruno Chareyre posted a new comment: Very interesting. I'm unsure where to improve that in source code though. Mass-inertia assignements are done mainly in some python helper function. As you found out you can

Re: [Yade-users] [Question #695558]: Dynamics of pfacet object does not appear to be correct

Question #695558 on Yade changed: https://answers.launchpad.net/yade/+question/695558 Bruno Chareyre requested more information: with newton damping 0.2 and base_pos = [ [0.011, 0.011, 0], [0.011, -0.011, 0], [-0.011, 0.011, 0], [-0.011, -0.011, 0], ] The solution is stable

Re: [Yade-users] [Question #695558]: Dynamics of pfacet object does not appear to be correct

Question #695558 on Yade changed: https://answers.launchpad.net/yade/+question/695558 Bruno Chareyre proposed the following answer: I tried you example (nice one!) and I did not see something obviously wrong. It looks a bit like a ball-on-a-tip problem. This triangular object has to fall one way

Re: [Yade-users] [Question #695558]: Dynamics of pfacet object does not appear to be correct

Question #695558 on Yade changed: https://answers.launchpad.net/yade/+question/695558 Status: Open => Answered Bruno Chareyre proposed the following answer: Thanks for more feedback. > I did not download a new version of yade. But I pasted the fix given in [1] If you did it car

Re: [Yade-users] [Question #696198]: Using the Parallel Collider

Question #696198 on Yade changed: https://answers.launchpad.net/yade/+question/696198 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, 1. it is in trunk 2. nothing specific If you want to see how it works you can do this: O.timing.enabled=True O.run(N,True) f

Re: [Yade-users] [Question #696150]: Output specific bodies using TW.setState

Question #696150 on Yade changed: https://answers.launchpad.net/yade/+question/696150 Bruno Chareyre proposed the following answer: Hi, I confirm TesselationWrapper may have issues with space periodicity, but not because of this: > " Hypothetically: If the particle in state 0 is on t

Re: [Yade-users] [Question #696150]: Output specific bodies using TW.setState

Question #696150 on Yade changed: https://answers.launchpad.net/yade/+question/696150 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, i have assumptions on why it would be the case but nothing sure. Could you please provide a minimal working example of the prob

Re: [Yade-users] [Question #696146]: script of fluidized bed by E Montella et al., PRE, 2016

Question #696146 on Yade changed: https://answers.launchpad.net/yade/+question/696146 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi Luc I'm giving a similar script every year to students for some projects. :) It is not in yade repos though, maybe it sho

Re: [Yade-users] [Question #696060]: How to make some stress plates consist of 3 circles (that have radius gradually (0.5, 1, 2)?

Question #696060 on Yade changed: https://answers.launchpad.net/yade/+question/696060 Bruno Chareyre posted a new comment: > def getBottomStress(center,radius): On this basis you could generate stress for each (x,y) on a grid (possibly with square domains instead of circles, with square s

Re: [Yade-users] [Question #696131]: Problem MPI_CXX during default Compilation

Question #696131 on Yade changed: https://answers.launchpad.net/yade/+question/696131 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, Are you using "gold" linker? [1] If so, this is a known cmake issue (independent of yade, with still no idea how

Re: [Yade-users] [Question #695989]: Packing with two PSD

Question #695989 on Yade changed: https://answers.launchpad.net/yade/+question/695989 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, > how to make a packing with 2 psdSizes and psdCumm while using one packSpherepack() sp.makeCloud((mnx,mny,mnz),(mxx,m

Re: [Yade-users] [Question #695935]: Floating point exception (core dumped)

Question #695935 on Yade changed: https://answers.launchpad.net/yade/+question/695935 Bruno Chareyre posted a new comment: Hi, The crash was due to erasing just after reloading. The problem is fixed in source code in [1]. The fix is not yet in yadedaily but it should appear quickly. If you use

Re: [Yade-users] [Question #696037]: contact forces in VTKrecorder

Question #696037 on Yade changed: https://answers.launchpad.net/yade/+question/696037 Bruno Chareyre requested more information: I suspect you have definitely no reason to use any vtk-related export. Let you explain what you need. B -- You received this question notification because your team

Re: [Yade-users] [Question #696037]: contact forces in VTKrecorder

Question #696037 on Yade changed: https://answers.launchpad.net/yade/+question/696037 Bruno Chareyre proposed the following answer: (I failed to answer to the correct adress and now my answer is in yade- users list, sorry - duplicating here) Hi Eleni! Don't yo get some "*.intrs.N.vtp&

Re: [Yade-users] [Question #696037]: contact forces in VTKrecorder

Hi Eleni! Don't yo get some "*.intrs.N.vtp" file together with the *.spheres.N.vtu's and others? Do you want to export for visualization or for acquiring data? It is a bit unusual to look for "particles involved in each contact" in some vtk. Cheers Bruno

Re: [Yade-users] [Question #695935]: Floating point exception (core dumped)

Question #695935 on Yade changed: https://answers.launchpad.net/yade/+question/695935 Bruno Chareyre posted a new comment: Hi, I confirm segfault on ubuntu20/yadedaily (20210204-4960~ab01ee8~focal1) The problem is apparently with InsertionSortCollider at iteration 2 in script2. I suspect

Re: [Yade-users] [Question #695679]: stress path

Question #695679 on Yade changed: https://answers.launchpad.net/yade/+question/695679 Bruno Chareyre posted a new comment: Indeed, that was strange: > triax.goal2 = strainRate > sigma2=triax.goal2 #huh? Looks better: > sigma2=triax.stress(triax.wall_top_id)[1] And then it does what

Re: [Yade-users] [Question #695873]: wet phase distribution

Question #695873 on Yade changed: https://answers.launchpad.net/yade/+question/695873 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, documentation might help here: In [4]: TwoPhaseFlowEngine.getC

Re: [Yade-users] [Question #695833]: movment along z axis whiles blockedDOFs= zXY

Hi, > O.engines= O.engines+[PyRunner(virtPeriod=0.02,command='ZSpeed()',label="ZSpeed")] After this line there is a function named "ZSpeed" as well as an engine called "ZSpeed". It sounds a bit dangerous, though I'm not sure it is the issue. Bruno

Re: [Yade-users] [Question #695827]: CHOLMOD warning: matrix not positive definite with PeriodicFlowEngine

Question #695827 on Yade changed: https://answers.launchpad.net/yade/+question/695827 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi Katia, I didn't check the details but did you impose a pressure somewhere? Else with an incompressible fluid the problem is

Re: [Yade-users] [Question #695821]: PeriTriaxController Load

Question #695821 on Yade changed: https://answers.launchpad.net/yade/+question/695821 Bruno Chareyre posted a new comment: Note: I found that: 1/ the example for save/reload on the wiki page [1] was obsolete (for some reason the github.com link stopped working), it is fixed now [2]. 2

Re: [Yade-users] [Question #695679]: stress path

Question #695679 on Yade changed: https://answers.launchpad.net/yade/+question/695679 Status: Open => Answered Bruno Chareyre proposed the following answer: What you describe is a particular logic for defining a loading path. That's fine but yade is agnostic wrt this. > how I can

Re: [Yade-users] [Question #695679]: stress path

Question #695679 on Yade changed: https://answers.launchpad.net/yade/+question/695679 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, The engine takes target stress-strain as input and it tries to reach them as an output. So I would think you need to def

Re: [Yade-users] [Question #695491]: Running parallel yade from the same input file

Question #695491 on Yade changed: https://answers.launchpad.net/yade/+question/695491 Status: Open => Answered Bruno Chareyre proposed the following answer: $ mpirun -np 4 echo "haha" haha haha haha haha Does it help? :) B -- You received this question notification because y

Re: [Yade-users] [Question #695461]: How to create a solid polyhedron capable of interacting with gridConnections?

Question #695461 on Yade changed: https://answers.launchpad.net/yade/+question/695461 Bruno Chareyre posted a new comment: > I found that this pfacet body is hollow. Indeed, it is a sort of shell model. It is always possible to add interactions between nodes across the hollow domain, emulat

Re: [Yade-users] [Question #695058]: Bending beams mass computation

Question #695058 on Yade changed: https://answers.launchpad.net/yade/+question/695058 Bruno Chareyre posted a new comment: > Is it correct to imagine the bending behaviour as a rotational spring like in figure 3 of [3]? Mmmmh... I would say no, it isn't the right picture. The rotational spr

Re: [Yade-users] [Question #695461]: How to create a solid polyhedron capable of interacting with gridConnections?

Question #695461 on Yade changed: https://answers.launchpad.net/yade/+question/695461 Bruno Chareyre posted a new comment: > This implies the gridConnections do not take part in dynamics. Then why do they have mass? I can't tell precisely. There should be a way to build them with zero- m

Re: [Yade-users] [Question #695475]: Scaling of Yade with the number of particles

Question #695475 on Yade changed: https://answers.launchpad.net/yade/+question/695475 Bruno Chareyre proposed the following answer: Hi, I am not able to answer either. I can tell that a typical yade performance on a typical desktop is of the order of 0.5e6 particle*iteration/second

Re: [Yade-users] [Question #695226]: RungeKuttaCashKarp54Integrator with gridConnections is causing errors

Question #695226 on Yade changed: https://answers.launchpad.net/yade/+question/695226 Bruno Chareyre posted a new comment: Hi, > the oscillations were similar to what we find in a damped oscillator Cool. :) > Am I wrong to assume N is the number of gridNodes and L is the

Re: [Yade-users] [Question #695333]: Same version unable to load .yade file

Question #695333 on Yade changed: https://answers.launchpad.net/yade/+question/695333 Bruno Chareyre posted a new comment: Yes. >From the save/load point of view the problem is obvious. Objects are archived >in some format (binary or xml) then reloaded. If the archive for one object &g

Re: [Yade-users] [Question #695333]: Same version unable to load .yade file

Question #695333 on Yade changed: https://answers.launchpad.net/yade/+question/695333 Status: Open => Answered Bruno Chareyre proposed the following answer: Hi, > Shouldn't it ... Well... apparently it "doesn't " :) I don't think we ever anticipated that particular situati

Re: [Yade-users] [Question #694945]: How to run deformableBodies examples

Question #694945 on Yade changed: https://answers.launchpad.net/yade/+question/694945 Bruno Chareyre posted a new comment: Just a quick note: DeformableElement's is part of the code after a single man (Burak Er) pushed it. I'm afraid none of current core devs are really aware of how it works

Re: [Yade-users] [Question #695058]: Bending beams mass computation

Question #695058 on Yade changed: https://answers.launchpad.net/yade/+question/695058 Status: Open => Answered Bruno Chareyre proposed the following answer: You are welcome, nice to hear that someone is using it. :) > In other words, what do I need to do in order to set the mass of

Re: [Yade-users] [Question #695226]: RungeKuttaCashKarp54Integrator with gridConnections is causing errors

Question #695226 on Yade changed: https://answers.launchpad.net/yade/+question/695226 Bruno Chareyre posted a new comment: > It could be that there is a mismatch between what you input at the interactions scale and what you expect in terms of damping at the structural scale I would

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