New question #706797 on Yade:
https://answers.launchpad.net/yade/+question/706797
Hello,
I create a sphere packing position in the 1st script. However in second script,
I import the position from the 1st script. I reduce the sphere value. I am
confuse on why once the sphere hit the funnel the simulation stop right away.
### 1st script ###
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 = 0.35
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)
# 1.60 mm 51x1400 = 71,400 particles
n5 = sp.makeCloud(minCorner=corner[0], maxCorner=corner[1], rMean=0.0016/2,
num=1400)
# 0.8 mm 51x4140 = 211,140 particles
n6 = sp.makeCloud(minCorner=corner[0], maxCorner=corner[1], rMean=0.0008/2,
num=4140)
sp.toSimulation()
export.text("testCloud.txt")
##
### 2nd script ###
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 = 27000, label =
'gravel')
asphalt_binder = CohFrictMat(young = 1e7, poisson = 0.25, density = 10600,
frictionAngle = radians(40), normalCohesion = 2e5, shearCohesion = 2e5, label
= 'asphalt_binder')
# add properties
O.materials.append(gravel)
O.materials.append(asphalt_binder)
# give color and properties to shpere
for body in O.bodies:
if not isinstance(body.shape, Sphere):
continue
if body.shape.radius == 0.01575/2 :
body.shape.color = (0,0,1) #blue
body.material = gravel
if body.sh
