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#############################################################
## ##
## Copyright (c) 2007-2017 by The University of Queensland ##
## Centre for Geoscience Computing ##
## http://earth.uq.edu.au/centre-geoscience-computing ##
## ##
## Primary Business: Brisbane, Queensland, Australia ##
## Licensed under the Open Software License version 3.0 ##
## http://www.apache.org/licenses/LICENSE-2.0 ##
## ##
#############################################################
from __future__ import division, print_function
from gengeo import *
#An example python script to generate an aggregate of hexagonal grains
# with circular boundary conditions and tagging of particles along lines
# Define region extremities:
size = 5.0
minPoint = Vector3(0.0,0.0,0.0)
maxPoint = Vector3(size,size,0.0)
# Define the geometrical constraints for packing
top_line = Line2D (
startPoint = Vector3(size,0.0,0.0),
endPoint = minPoint
)
bottom_line = Line2D (
startPoint = maxPoint,
endPoint = Vector3(0.0,size,0.0)
)
box = BoxWithLines2DSubVol (
minPoint = minPoint-Vector3(-0.5,0.0,0.0),
maxPoint = maxPoint+Vector3(0.5,0.0,0.0),
svdim_x = 2.5,
svdim_y = 2.5
)
box.addLine(top_line)
box.addLine(bottom_line)
# Create a multi-group neighbour table to contain the particles:
mntable = CircMNTable2D (
minPoint = minPoint,
maxPoint = maxPoint,
gridSize = 2.5
)
# Fill the volume with particles:
packer = HexAggregateInsertGenerator2D (
minRadius = 0.1,
maxRadius = 1.0,
insertFails = 1000,
maxIterations = 1000,
tolerance = 1.0e-6
)
# Generate the packing
packer.generatePacking(
volume = box,
ntable = mntable,
tag = 0
)
# tag particles along the top_line and bottom_line
mntable.tagParticlesAlongLineWithMask(
line = top_line,
distance = 0.5,
tag = 4,
mask = 4
)
#and the compact form:
mntable.tagParticlesAlongLineWithMask(bottom_line, 0.5, 8, 8, 0)
#print the porosity of the particle packing:
volume = size*size
porosity = (volume - mntable.getSumVolume())/volume
print("Porosity: ",porosity)
# write a geometry file in VTK format
mntable.write(
fileName = "temp/geo_example7.vtu",
outputStyle = 2
)
# write a geometry file in ESyS-Particle geo format
mntable.write(
fileName = "temp/geo_example7.geo",
outputStyle = 1
)
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