Re: [Yade-users] [Question #706332]: Reduce or remove rebound after contact
Question #706332 on Yade changed: https://answers.launchpad.net/yade/+question/706332 Jan Stránský posted a new comment: See [2] for a "semi-permeable" wall example. Cheers Jan [2] https://answers.launchpad.net/yade/+question/706684 -- 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 #706332]: Reduce or remove rebound after contact
Question #706332 on Yade changed: https://answers.launchpad.net/yade/+question/706332 Status: Open => Expired Launchpad Janitor expired the question: This question was expired because it remained in the 'Open' state without activity for the last 15 days. -- 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 #706332]: Reduce or remove rebound after contact
Question #706332 on Yade changed: https://answers.launchpad.net/yade/+question/706332 Status: Needs information => Open Huan gave more information on the question: Hello, I just recently picked up coding and starting to learn about YADE. If there is a better way to implement the coding and simulation, I'm all ears. 1. pandas actually isn't needed but I just use it for my data saving purposes. 2. I have a project to study about the particle packing by using free fall action, while the particles generated are related to sieve analysis e.g. 4.75mm, 4.00mm, 3.35 etc. Due to the simulation being slow, I am thinking of using free server to simulate the simulation. I was trying to created a box allow the sphere to ricochet against it and rebound into the cylinder. The next process of my project is to transform the sphere in this simulation into polyhedron. Thanks Huan -- 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 #706332]: Reduce or remove rebound after contact
Question #706332 on Yade changed: https://answers.launchpad.net/yade/+question/706332 Status: Open => Needs information Jan Stránský requested more information: Hello, please provide a MWE [1]. In this case: - are "data", "df" and similar (and pandas in general) necessary to show your problem? If not, please remove them - are the "tiny" particles, making the simulation "very slow", necessary? Wouldn't just two layers of largest particles be sufficient? > Is it possible to only allows the particles to fall into the container without bouncing out after contact ... You can reduce the effect. Some options are: - contact law damping - numerical integrator damping - using higher cylinder to prevent spheres bouncing out - using "semi-permeable" wall, masked such that it does not contact with spheres going down, but does contact with those going up (preventing them to bounce out) - ... but IMO it is not possible (and even desirable) to remove "bouncing" completely > but it didn't work as I expected it to How did you expect it to work? 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 #706332]: Reduce or remove rebound after contact
Question #706332 on Yade changed: https://answers.launchpad.net/yade/+question/706332 Description changed to: import random import math from yade import geom, pack, utils import pandas as pd # Define cylinder parameters center = (0, 0, 0) cyl_radius = 0.102 cyl_height = 0.064 # create cylindrical body with radius 0.102 m and height 0.064 m cylinder = geom.facetCylinder(center=center, radius=cyl_radius, height=cyl_height, segmentsNumber=80, wallMask=6) # define material properties mat = utils.PolyhedraMat() mat.density = 2600 # kg/m^3 mat.young = 1E6 # Pa mat.poisson = 2 / 1E6 mat.frictionAngle = 0.6 # rad # assign material to each body in the cylinder for body in cylinder: body.bodyMat = mat # add cylinder to simulation O.bodies.append(cylinder) # Define box dimensions box_dimensions = (0.1, 0.1, 0.1) # Create box at origin box = geom.facetBox(center=(0,0,0), extents=box_dimensions, wallMask=31) # Define material properties for box mat = O.materials.append(FrictMat(density=2600, young=1E6, poisson=0.3, frictionAngle=0.6)) # Assign material to each facet of box for body in box: body.bodyMat = mat # Add box to simulation O.bodies.append(box) # define sphere parameters and number of spheres radius = 0.01575 num = 6 radius1 = 0.01175 num1 = 7 radius2 = 0.011 num2 = 8 radius3 = 0.01025 num3 = 8 radius4 = 0.0083125 num4 = 31 radius5 = 0.007125 num5 = 31 radius6 = 0.0059375 num6 = 32 radius7 = 0.0041525 num7 = 25 radius8 = 0.003555 num8 = 26 radius9 = 0.0029575 num9 = 26 radius10 = 0.002065 num10 = 25 radius11 = 0.00177 num11 = 26 radius12 = 0.001475 num12 = 26 radius13 = 0.001035 num13 = 155 radius14 = 0.00089 num14 = 155 radius15 = 0.000745 num15 = 156 radius16 = 0.00045 num16 = 9735 ## create empty sphere packing sp = pack.SpherePack() sp1 = pack.SpherePack() sp2 = pack.SpherePack() sp3 = pack.SpherePack() sp4 = pack.SpherePack() sp5 = pack.SpherePack() sp6 = pack.SpherePack() sp7 = pack.SpherePack() sp8 = pack.SpherePack() sp9 = pack.SpherePack() sp10 = pack.SpherePack() sp11 = pack.SpherePack() sp12 = pack.SpherePack() sp13 = pack.SpherePack() sp14 = pack.SpherePack() sp15 = pack.SpherePack() sp16 = pack.SpherePack() # generate randomly sphere sp.makeCloud((-0.055,-0.055,0.0105), (0.055,0.055,0.0105), rMean=radius, rRelFuzz=0, num=num) sp1.makeCloud((-0.055,-0.055,0.0380), (0.055,0.055,0.0380), rMean=radius1, rRelFuzz=0, num=num1) sp2.makeCloud((-0.055,-0.055,0.0608), (0.055,0.055,0.0608), rMean=radius2, rRelFuzz=0, num=num2) sp3.makeCloud((-0.055,-0.055,0.0820), (0.055,0.055,0.0820), rMean=radius3, rRelFuzz=0, num=num3) sp4.makeCloud((-0.0605,-0.0605,0.1006), (0.0605,0.0605,0.1006), rMean=radius4, rRelFuzz=0, num=num4) sp5.makeCloud((-0.0615,-0.0615,0.1160), (0.0615,0.0615,0.1160), rMean=radius5, rRelFuzz=0, num=num5) sp6.makeCloud((-0.0605,-0.0605,0.1291), (0.0605,0.0605,0.1291), rMean=radius6, rRelFuzz=0, num=num6) sp7.makeCloud((-0.0605,-0.0605,0.1392), (0.0605,0.0605,0.1392), rMean=radius7, rRelFuzz=0, num=num7) sp8.makeCloud((-0.0605,-0.0605,0.1469), (0.0605,0.0605,0.1469), rMean=radius8, rRelFuzz=0, num=num8) sp9.makeCloud((-0.0605,-0.0605,0.1534), (0.0605,0.0605,0.1534), rMean=radius9, rRelFuzz=0, num=num9) sp10.makeCloud((-0.0605,-0.0605,0.1584), (0.0605,0.0605,0.1584), rMean=radius10, rRelFuzz=0, num=num10) sp11.makeCloud((-0.0605,-0.0605,0.1622), (0.0605,0.0605,0.1622), rMean=radius11, rRelFuzz=0, num=num11) sp12.makeCloud((-0.0605,-0.0605,0.1655), (0.0605,0.0605,0.1655), rMean=radius12, rRelFuzz=0, num=num12) sp13.makeCloud((-0.0605,-0.0605,0.1680), (0.0605,0.0605,0.1680), rMean=radius13, rRelFuzz=0, num=num13) sp14.makeCloud((-0.0605,-0.0605,0.1699), (0.0605,0.0605,0.1699), rMean=radius14, rRelFuzz=0, num=num14) sp15.makeCloud((-0.0605,-0.0605,0.1715), (0.0605,0.0605,0.1715), rMean=radius15, rRelFuzz=0, num=num15) sp16.makeCloud((-0.0605,-0.0605,0.1727), (0.0605,0.0605,0.1727), rMean=radius16, rRelFuzz=0, num=num16) # add the sphere pack to the simulation sp.toSimulation() sp1.toSimulation() sp2.toSimulation() sp3.toSimulation() sp4.toSimulation() sp5.toSimulation() sp6.toSimulation() sp7.toSimulation() sp8.toSimulation() sp9.toSimulation() sp10.toSimulation() sp11.toSimulation() sp12.toSimulation() sp13.toSimulation() sp14.toSimulation() sp15.toSimulation() sp16.toSimulation() # add interaction of gravity of sphere and cylinder O.engines = [ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(), Bo1_Facet_Aabb()]), InteractionLoop( # handle sphere+sphere and facet+sphere collisions [Ig2_Sphere_Sphere_ScGeom(), Ig2_Facet_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys()], [Law2_ScGeom_FrictPhys_CundallStrack()] ), NewtonIntegrator(gravity=(0,0,-9.81), damping=0.4), ] O.dt = 0.1 * PWaveTimeStep() # run the simulation for 1000 steps O.run(1000, wait=True) for body in O.bodies: if not isinstance(body.shape, Sphere): continue if body.
[Yade-users] [Question #706332]: Reduce or remove rebound after contact
New question #706332 on Yade: https://answers.launchpad.net/yade/+question/706332 import random import math from yade import geom, pack, utils import pandas as pd # Define cylinder parameters center = (0, 0, 0) cyl_radius = 0.102 cyl_height = 0.064 # create cylindrical body with radius 0.102 m and height 0.064 m cylinder = geom.facetCylinder(center=center, radius=cyl_radius, height=cyl_height, segmentsNumber=80, wallMask=6) # define material properties mat = utils.PolyhedraMat() mat.density = 2600 # kg/m^3 mat.young = 1E6 # Pa mat.poisson = 2 / 1E6 mat.frictionAngle = 0.6 # rad # assign material to each body in the cylinder for body in cylinder: body.bodyMat = mat # add cylinder to simulation O.bodies.append(cylinder) # Define box dimensions box_dimensions = (0.1, 0.1, 0.1) # Create box at origin box = geom.facetBox(center=(0,0,0), extents=box_dimensions, wallMask=31) # Define material properties for box mat = O.materials.append(FrictMat(density=2600, young=1E6, poisson=0.3, frictionAngle=0.6)) # Assign material to each facet of box for body in box: body.bodyMat = mat # Add box to simulation O.bodies.append(box) # define sphere parameters and number of spheres radius = 0.01575 num = 6 radius1 = 0.01175 num1 = 7 radius2 = 0.011 num2 = 8 radius3 = 0.01025 num3 = 8 radius4 = 0.0083125 num4 = 31 radius5 = 0.007125 num5 = 31 radius6 = 0.0059375 num6 = 32 radius7 = 0.0041525 num7 = 25 radius8 = 0.003555 num8 = 26 radius9 = 0.0029575 num9 = 26 radius10 = 0.002065 num10 = 25 radius11 = 0.00177 num11 = 26 radius12 = 0.001475 num12 = 26 radius13 = 0.001035 num13 = 155 radius14 = 0.00089 num14 = 155 radius15 = 0.000745 num15 = 156 radius16 = 0.00045 num16 = 9735 ## create empty sphere packing sp = pack.SpherePack() sp1 = pack.SpherePack() sp2 = pack.SpherePack() sp3 = pack.SpherePack() sp4 = pack.SpherePack() sp5 = pack.SpherePack() sp6 = pack.SpherePack() sp7 = pack.SpherePack() sp8 = pack.SpherePack() sp9 = pack.SpherePack() sp10 = pack.SpherePack() sp11 = pack.SpherePack() sp12 = pack.SpherePack() sp13 = pack.SpherePack() sp14 = pack.SpherePack() sp15 = pack.SpherePack() sp16 = pack.SpherePack() # generate randomly sphere sp.makeCloud((-0.055,-0.055,0.0105), (0.055,0.055,0.0105), rMean=radius, rRelFuzz=0, num=num) sp1.makeCloud((-0.055,-0.055,0.0380), (0.055,0.055,0.0380), rMean=radius1, rRelFuzz=0, num=num1) sp2.makeCloud((-0.055,-0.055,0.0608), (0.055,0.055,0.0608), rMean=radius2, rRelFuzz=0, num=num2) sp3.makeCloud((-0.055,-0.055,0.0820), (0.055,0.055,0.0820), rMean=radius3, rRelFuzz=0, num=num3) sp4.makeCloud((-0.0605,-0.0605,0.1006), (0.0605,0.0605,0.1006), rMean=radius4, rRelFuzz=0, num=num4) sp5.makeCloud((-0.0615,-0.0615,0.1160), (0.0615,0.0615,0.1160), rMean=radius5, rRelFuzz=0, num=num5) sp6.makeCloud((-0.0605,-0.0605,0.1291), (0.0605,0.0605,0.1291), rMean=radius6, rRelFuzz=0, num=num6) sp7.makeCloud((-0.0605,-0.0605,0.1392), (0.0605,0.0605,0.1392), rMean=radius7, rRelFuzz=0, num=num7) sp8.makeCloud((-0.0605,-0.0605,0.1469), (0.0605,0.0605,0.1469), rMean=radius8, rRelFuzz=0, num=num8) sp9.makeCloud((-0.0605,-0.0605,0.1534), (0.0605,0.0605,0.1534), rMean=radius9, rRelFuzz=0, num=num9) sp10.makeCloud((-0.0605,-0.0605,0.1584), (0.0605,0.0605,0.1584), rMean=radius10, rRelFuzz=0, num=num10) sp11.makeCloud((-0.0605,-0.0605,0.1622), (0.0605,0.0605,0.1622), rMean=radius11, rRelFuzz=0, num=num11) sp12.makeCloud((-0.0605,-0.0605,0.1655), (0.0605,0.0605,0.1655), rMean=radius12, rRelFuzz=0, num=num12) sp13.makeCloud((-0.0605,-0.0605,0.1680), (0.0605,0.0605,0.1680), rMean=radius13, rRelFuzz=0, num=num13) sp14.makeCloud((-0.0605,-0.0605,0.1699), (0.0605,0.0605,0.1699), rMean=radius14, rRelFuzz=0, num=num14) sp15.makeCloud((-0.0605,-0.0605,0.1715), (0.0605,0.0605,0.1715), rMean=radius15, rRelFuzz=0, num=num15) sp16.makeCloud((-0.0605,-0.0605,0.1727), (0.0605,0.0605,0.1727), rMean=radius16, rRelFuzz=0, num=num16) # add interaction of gravity of sphere and cylinder O.engines = [ForceResetter(), InsertionSortCollider([Bo1_Sphere_Aabb(), Bo1_Facet_Aabb()]), InteractionLoop( # handle sphere+sphere and facet+sphere collisions [Ig2_Sphere_Sphere_ScGeom(), Ig2_Facet_Sphere_ScGeom()], [Ip2_FrictMat_FrictMat_FrictPhys()], [Law2_ScGeom_FrictPhys_CundallStrack()] ), NewtonIntegrator(gravity=(0,0,-9.81), damping=0.4), ] O.dt = 0.1 * PWaveTimeStep() # run the simulation for 1000 steps O.run(1000, wait=True) for body in O.bodies: if not isinstance(body.shape, Sphere): continue if body.shape.radius == radius: #SP body.shape.color = (0,0,1) #blue if body.shape.radius == radius1: #SP1 body.shape.color = (1,0,0) #red if body.shape.radius == radius2: #SP2 body.shape.color = (0,1,0) #green if body.shape.radius == radius3: #SP3 body.shape.color = (1,1,1) #white if body.shape.radius == radius4: #SP4 body.shape.color = (1,1,0) #yellow
