Re: [Yade-users] [Question #696302]: contact model for particle compaction
Question #696302 on Yade changed: https://answers.launchpad.net/yade/+question/696302 Status: Needs information => Open Ricardo Lorenzoni gave more information on the question: Hi. Thanks for your answer. figure 1 - https://pasteboard.co/JV5qiMz.png In this first image, you can see the experimental results, where the curve shows that as more weight is added to the sample, the effect on the compacting of the grain mass will decrease. figure 2 - https://pasteboard.co/JV5mPSf.png In this second image, the results of the computer simulations are plotted, in which, we can see that the effect of increasing weight on the compaction of the particles is linear. I have already carried out a series of tests with several contact and physical models, in none of them I was able to replicate the curve behavior, as shown in Figure 1. Here is an example of the base code I am using for the simulations. the variable "altura" indicates the height of the grain mass on the sample analyzed and, is set to 10 m. sample code with cundallStrack contact model: import sys, math, csv, os from minieigen import * from yade import pack, plot, utils, ymport, export matWall=CohFrictMat(density=2700,young=7e10,poisson=0.334,label="parede") idparede=O.materials.append(matWall) r_mean=0.002963 altura=10 lx=0 hx=0.1 ly=0 hy=0.1 lz=0 hz=0.15 p1 = (lx, ly, lz) p2 = (lx, hy, lz) p3 = (hx, ly, lz) p4 = (hx, hy, lz) p5 = (lx, ly, hz) p6 = (lx, hy, hz) p7 = (hx, ly, hz) p8 = (hx, hy, hz) p9 = (lx, ly, hz+0.05) p10= (lx, hy, hz+0.05) p11= (hx, ly, hz+0.05) p12= (hx, hy, hz+0.05) # DEFINICAO DAS FACES #base base1=utils.facet([p1,p2,p3],mask=1,wire=True,material=idparede) base2=utils.facet([p2,p3,p4],mask=1,wire=True,material=idparede) O.bodies.append(base1) O.bodies.append(base2) #Wall1 parede11=utils.facet([p1,p2,p5],mask=1,wire=True,material=idparede) parede12=utils.facet([p2,p5,p6],mask=1,wire=True,material=idparede) O.bodies.append(parede11) O.bodies.append(parede12) #Wall2 parede21=utils.facet([p1,p3,p5],mask=1,wire=True,material=idparede) parede22=utils.facet([p3,p5,p7],mask=1,wire=True,material=idparede) O.bodies.append(parede21) O.bodies.append(parede22) #Wall3 parede31=utils.facet([p3,p4,p7],mask=1,wire=True,material=idparede) parede32=utils.facet([p4,p7,p8],mask=1,wire=True,material=idparede) O.bodies.append(parede31) O.bodies.append(parede32) #Wall4 parede41=utils.facet([p2,p4,p6],mask=1,wire=True,material=idparede) parede42=utils.facet([p4,p6,p8],mask=1,wire=True,material=idparede) O.bodies.append(parede41) O.bodies.append(parede42) #Wall5 parede51=utils.facet([p5,p6,p9],mask=1,wire=True,material=idparede) parede52=utils.facet([p6,p9,p10],mask=1,wire=True,material=idparede) O.bodies.append(parede51) O.bodies.append(parede52) #Wall6 parede61=utils.facet([p6,p8,p12],mask=1,wire=True,material=idparede) parede62=utils.facet([p12,p10,p6],mask=1,wire=True,material=idparede) O.bodies.append(parede61) O.bodies.append(parede62) #Wall7 parede71=utils.facet([p7,p8,p11],mask=1,wire=True,material=idparede) parede72=utils.facet([p8,p11,p12],mask=1,wire=True,material=idparede) O.bodies.append(parede71) O.bodies.append(parede72) #Wall8 parede81=utils.facet([p5,p7,p9],mask=1,wire=True,material=idparede) parede82=utils.facet([p7,p9,p11],mask=1,wire=True,material=idparede) O.bodies.append(parede81) O.bodies.append(parede82) particles=CohFrictMat(density=1163,young=2.6e6,poisson=0.25,alphaKr=0.05,frictionAngle=radians(22.6),label="particle") idparticle=O.materials.append(particles) O.bodies.append(sphere((0.01,0.01,0.01),radius=r_mean,material=idparticle)) # DEFINICAO DOS MOTORES O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()],verletDist=.05*.29e-3), InteractionLoop( # handle sphere+sphere and facet+sphere collisions [Ig2_Sphere_Sphere_ScGeom(),Ig2_Facet_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys()], [Law2_ScGeom_FrictPhys_CundallStrack()] #modelo linear de contato ), NewtonIntegrator(gravity=(0,0,-9.81),damping=0.04), BoxFactory(maxParticles=-1, extents=(hx/2,hy/2,0.01), center=(hx/2,hy/2,hz+0.03), rMin=r_mean, rMax=r_mean, vMin=100, vMax=100, vAngle=0, massFlowRate=0.01*16.6, normal=(0,0,0), label='factory', materialId=idparticle), PyRunner(virtPeriod=0.02, command='verificaAltura()'), ] global pesomassa pesomassa=0 def calculaPeso(): global pesomassa for b in O.bodies: if isinstance(b.shape, Sphere): pesomassa+=b.state.mass pesometro=(altura*((100*pesomassa)/15)) adicionaPeso(pesometro) global executa executa=True def verificaAltura(): global executa if executa: count=0 for b in O.bodies: if isinstance(b.shape, Sphere): if (b.state.vel[2]&
[Yade-users] [Question #696302]: contact model for particle compaction
New question #696302 on Yade: https://answers.launchpad.net/yade/+question/696302 Hi!! I am conducting a study on compaction of particles. In my study, the particles must be independent, it is not interesting to know when a particular particle / structure would break due to the applied pressure. It is common knowledge that, as the weight is increased over a layer of particles, its porosity reduces, however, this reduction does not happen in a linear way, but in a curve, where the greater the amount of weight added, the less the effect on compression. However, I have already performed tests with several contact models for spherical particles and in none of the models tested so far, I obtained the expected behavior in compaction, always occurring in a linear way. I would like to know if anyone would have any tips on contact model and physical model to use that will present the expected behavior. Thank you for your attention 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 #668026]: detailed step-by-step tutorial for manual installation
Question #668026 on Yade changed: https://answers.launchpad.net/yade/+question/668026 Status: Answered => Open Ricardo Lorenzoni is still having a problem: I am looking for a tutorial to install yade without performing apt-get, manually installing the prerequisites, since I am using a server with multiple processors and cores, however, this equipment is getting inferior performance to that of a notebook. I believe that a manual installation would allow a gain in performance and efficiency in the use of resources. I tried performing the manual installation several times, however, due to my little knowledge, I must be doing something wrong. Although you have an explanation of how to do the manual installation in the yade documentation, this explanation is vague and unintuitive. I believe that if someone has already done this installation before, they should have created a step-by-step guide, such a document would be of great 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
[Yade-users] [Question #668026]: detailed step-by-step tutorial for manual installation
New question #668026 on Yade: https://answers.launchpad.net/yade/+question/668026 Hi, I'm trying to install the yade manually but, i'm through troubles in this. Do somebody have an detailed step-by-step tutorial for a manual installation? This can help many users to get most performance on executing simulations. 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
[Yade-users] [Question #661490]: Material properties
New question #661490 on Yade: https://answers.launchpad.net/yade/+question/661490 Good afternoon!!! I'm having a lot of problems with the properties of the materials. I wonder if anyone knows any references that contain the material properties of several different materials to use as a reference guide. -- 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 #647827]: sphere factory
New question #647827 on Yade: https://answers.launchpad.net/yade/+question/647827 Hi, I'm working on simulations with many spheres, and I have tried many ways to create a sphere factory like the inletbox (implemented in the software woo) but in my most successful implementation, the sphere factory move. Can someone help me on this issue? I need a sphere factory that creates spheres during a specific time. how can I develop this in the following code? import sys; from minieigen import *; import math; from yade import pack, plot, utils, ymport, export; materialParede=FrictMat(density=7800,poisson=0.3,young=1.82e11,frictionAngle=radians(22.0), label="parede") p1=(-.2,-.2,0) p2=(-.2,.2,0) p3=(.2,-.2,0) p4=(.2,.2,0) p5=(-.2,-.2,.5) p6=(-.2,.2,.5) p7=(.2,-.2,.5) p8=(.2,.2,.5) f1=utils.facet([p1,p2,p5],material=materialParede, wire=False) f2=utils.facet([p2,p5,p6],material=materialParede, wire=False) f3=utils.facet([p1,p3,p7],material=materialParede, wire=False) f4=utils.facet([p1,p5,p7],material=materialParede, wire=False) f5=utils.facet([p3,p4,p7],material=materialParede, wire=False) f6=utils.facet([p4,p7,p8],material=materialParede, wire=False) f7=utils.facet([p2,p4,p8],material=materialParede, wire=False) f8=utils.facet([p2,p6,p8],material=materialParede, wire=False) f9=utils.facet([p1,p2,p3],material=materialParede, wire=False) f10=utils.facet([p2,p3,p4],material=materialParede, wire=False) O.bodies.append(f1) O.bodies.append(f2) O.bodies.append(f3) O.bodies.append(f4) O.bodies.append(f5) O.bodies.append(f6) O.bodies.append(f7) O.bodies.append(f8) O.bodies.append(f9) O.bodies.append(f10) O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()],verletDist=.05*.29e-3), InteractionLoop( # handle sphere+sphere and facet+sphere collisions [Ig2_Sphere_Sphere_L3Geom(),Ig2_Facet_Sphere_L3Geom()], [Ip2_FrictMat_FrictMat_FrictPhys()], [Law2_L3Geom_FrictPhys_ElPerfPl()] ), NewtonIntegrator(damping=0.04,gravity=(0,0,-9.81)), ] O.dt=.5*utils.PWaveTimeStep() O.run() O.saveTmp() Thanks for helping! -- 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 #646049]: problem in drag force using
Question #646049 on Yade changed: https://answers.launchpad.net/yade/+question/646049 Status: Answered => Solved Ricardo Lorenzoni confirmed that the question is solved: Thanks Klaus Thoeni, 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
[Yade-users] [Question #646049]: problem in drag force using
New question #646049 on Yade: https://answers.launchpad.net/yade/+question/646049 We are trying to implement the drag force in a simulation with two different density materials, but when simulating the both spheres fall in the same velocity. Anyone knows what is wrong in our code? from yade import pack, plot, qt, utils, ymport import numpy Styrofoam=CohFrictMat(density=23) idStyrofoam=O.materials.append(Styrofoam) steel=CohFrictMat(density=7900,young=1.96e11) idsteel=O.materials.append(steel) O.bodies.append([ sphere(center=(0,2,100),radius=.5,material=idStyrofoam,color=(1,1,0)), sphere((0,0,100),.5, material=idsteel,color=(1,0,1)) ]) O.engines=[ ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()]), InteractionLoop( [Ig2_Sphere_Sphere_L3Geom(),Ig2_Facet_Sphere_L3Geom()], [Ip2_FrictMat_FrictMat_FrictPhys()], [Law2_L3Geom_FrictPhys_ElPerfPl()] ), NewtonIntegrator(gravity=(0,0,-9.81),damping=0.05), DragEngine(ids=[0,1],Cd=0.2, Rho=1.225), ] O.dt=.05*PWaveTimeStep() thank's for helping -- 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
