Re: [Yade-users] [Question #706790]: Sphere packing location
Question #706790 on Yade changed: https://answers.launchpad.net/yade/+question/706790 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 #706790]: Sphere packing location
Question #706790 on Yade changed: https://answers.launchpad.net/yade/+question/706790 Gem Herrera posted a new comment: Suppose velocity is not as high as that in one time step, it fully goes from one side of the barrier to the other, without of contact detection And inertia interplay is not such that the barrier cannot stop the particle from passing through. Regards https://proassemblage.com/ -- 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 #706790]: Sphere packing location
Question #706790 on Yade changed: https://answers.launchpad.net/yade/+question/706790 Jan Stránský posted a new comment: I understand that for actual simulation, you use that many particles. My point was that for this forum and for higher probability of good answer (I was not able to run the script on my laptop, so I was only guessing), always try to create a script focusing just on the problem, trying to make it minimal (both from the point of view of code and resources needed for run). As a byproduct, by creating such MWE, often you can find the problem yourself. "Small" particles (in fact any particle) can "go through" a barrier, it depends on many factors, mainly: - if velocity of the particle is not as high as that in one time step it fully goes from one side of the barrier to the other, without any possibility of contact detection - if stiffness / force / inertia interplay is not such that the barrier cannot prevent the particle from passing through. 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 #706790]: Sphere packing location
Question #706790 on Yade changed: https://answers.launchpad.net/yade/+question/706790 Status: Solved => Open Huan is still having a problem: Hey, Jan out of curiosity if the sphere that are generated are so small for example my asphalt binder is 0.0003 wouldn't it just go through the funnel and the cylinder for gravity deposition part? -- 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 #706790]: Sphere packing location
Question #706790 on Yade changed: https://answers.launchpad.net/yade/+question/706790 Status: Answered => Solved Huan confirmed that the question is solved: Thanks Jan, I was able to modify it by lowering the min z. I think 5 millions spheres is not relevant, but my prof. want all of it even though my pc aren't able to generate -- 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 #706790]: Sphere packing location
Question #706790 on Yade changed: https://answers.launchpad.net/yade/+question/706790 Status: Open => Answered Jan Stránský proposed the following answer: Hello, please provide a MWE [1], M = minimal Is 5 millions spheres needed to demonstrate your problem? "bursting" might be caused by particle overlap. Which coordinate "dividing it by 8" supports (if I understand it correctly).. 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 #706790]: Sphere packing location
New question #706790 on Yade:
https://answers.launchpad.net/yade/+question/706790
Hello,
I create two python script.
1. Sphere Packing Position Saving
2. Importing the sphere packing from 1. to do gravity deposition
>>The Problem I encounter is that I try to move the ( zi = minz + l * gridsize
>>) lower by dividing it by 8. However, after I import the postion in 2nd
>>python script the sphere packing burst out which I am confuse on what is
>>making them burst apart.
### SCRIPT 1 ###
import random
import math
from yade import geom, pack, utils, plot, ymport, export
import numpy as np
# Define cylinder with funnel parameters
center = (0, 0, 0)
diameter = 0.102
height = 0.18
# create cylindrical body with radius 0.102 m and height 0.064 m
cylinder = geom.facetCylinder(center=center, radius=diameter/2, height=height,
segmentsNumber=80, wallMask=6)
# add cylinder to simulation
O.bodies.append(cylinder)
# Define cylinder with funnel parameters
center1 = (0,0,height/2)
dBunker = 0.4
dOutput = 0.102
hBunker = 0
hOutput = 0.15
hPipe = 0
# create funnel as a bunker with diameter 0.102 m, height 0.064 m
funnel = geom.facetBunker(center=center1, dBunker=dBunker, dOutput=dOutput,
hBunker=hBunker,hOutput=hOutput, hPipe=hPipe, segmentsNumber=80, wallMask=4)
# add funnel to simulation
O.bodies.append(funnel)
def makeRandomBlocks(diameter, gridsize, minz, numblocks):
bunkerLimit = diameter/2
#
# Make grid blocks inside a bunker
#
grid = np.arange(-bunkerLimit, bunkerLimit, gridsize)
inGrid = []
for yi in grid:
for xi in grid:
c = [[xi, yi], [xi+gridsize, yi], [xi+gridsize, yi+gridsize], [xi,
yi+gridsize]]
#
# Check if the block corners are outside of the bunker or not
#
out = False
for p in c:
r = (p[0]**2 + p[1]**2)**0.5
if r > bunkerLimit:
out = True
#
# If the block is inside the bunker, keep it
#
if not out:
inGrid.append(c)
layer = math.ceil(numblocks / len(inGrid))
blocks = []
for l in range(layer):
for g in inGrid:
zi = minz + l*gridsize
p1 = g[0].copy()
p1.append(zi)
p2 = g[2].copy()
p2.append(zi+gridsize)
blocks.append([p1, p2])
random.shuffle(blocks)
return blocks
minZ = 2.35
dbunker = 0.4
gridSize = dbunker/8
numblocks = 51
blockList = makeRandomBlocks(dbunker, gridSize, minZ, numblocks)
for i in range(numblocks):
print("Making cloud block", i+1, "/", numblocks)
corner = blockList.pop()
sp = pack.SpherePack()
# 15.75 mm 13 particles
if (i < 13):
n1 = sp.makeCloud(minCorner=corner[0], maxCorner=corner[1],
rMean=0.01575/2, num=1)
# 11 mm 51 particles
n2 = sp.makeCloud(minCorner=corner[0], maxCorner=corner[1], rMean=0.011/2,
num=1)
# 7.125 mm 51x11 = 561 particles
n3 = sp.makeCloud(minCorner=corner[0], maxCorner=corner[1],
rMean=0.007125/2, num=11)
# 3.555 mm 51x100 = 5,100 particles
n4 = sp.makeCloud(minCorner=corner[0], maxCorner=corner[1],
rMean=0.003555/2, num=100)
# 1.77 mm 51x360 = 18,360 particles
n5 = sp.makeCloud(minCorner=corner[0], maxCorner=corner[1],
rMean=0.00177/2, num=360)
# 0.6 mm 51x19000 = 969,000 particles
n6 = sp.makeCloud(minCorner=corner[0], maxCorner=corner[1], rMean=0.0006/2,
num=19000)
# 0.3 mm 51x78510 = 4,004,010 particles
n7 = sp.makeCloud(minCorner=corner[0], maxCorner=corner[1], rMean=0.0003/2,
num=78510)
sp.toSimulation()
export.text("testCloud.txt")
### Script 2 ###
import random
import math
from yade import geom, pack, utils, plot, ymport, export
import numpy as np
# Define cylinder with funnel parameters
center = (0, 0, 0)
diameter = 0.102
height = 0.18
# create cylindrical body with radius 0.102 m and height 0.064 m
cylinder = geom.facetCylinder(center=center, radius=diameter/2, height=height,
segmentsNumber=80, wallMask=6)
# add cylinder to simulation
O.bodies.append(cylinder)
# Define cylinder with funnel parameters
center1 = (0,0,height/2)
dBunker = 0.4
dOutput = 0.102
hBunker = 0
hOutput = 0.15
hPipe = 0
# create funnel as a bunker with diameter 0.102 m, height 0.064 m
funnel = geom.facetBunker(center=center1, dBunker=dBunker, dOutput=dOutput,
hBunker=hBunker,hOutput=hOutput, hPipe=hPipe, segmentsNumber=80, wallMask=4)
# add funnel to simulation
O.bodies.append(funnel)
# add sphere packing
O.bodies.append(ymport.textExt('testCloud.txt',format='x_y_z_r'))
# materials Properties
gravel = CohFrictMat(young = 1e7, poisson = 0.25, density = 2700, label =
'gravel')
asphalt_binder = CohFrictMat(young = 1e7, poisson = 0.25, density = 1060,
frictionAngle = radians(40), normalCohesion = 2e5, shearCohesion = 2e5, label
= 'asphalt_binder')
# add properties
