File size: 1,073 Bytes
f421c2e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | import openpnm as op
import numpy as np
# Workspace and project
ws = op.Workspace()
proj = ws.new_project()
# Network
np.random.seed(7)
net = op.network.Cubic(shape=[51, 19, 1], spacing=1e-4, project=proj)
# Geometry
geo = op.geometry.SpheresAndCylinders(network=net, pores=net.Ps, throats=net.Ts)
# Phase
phase = op.phase.Water(network=net)
# Physics
phys = op.physics.GenericPhysics(network=net, phase=phase, geometry=geo)
phase['pore.diffusivity'] = 2e-09
phase['throat.diffusivity'] = 2e-09
mod = op.models.physics.diffusive_conductance.ordinary_diffusion
phys.add_model(propname='throat.diffusive_conductance',
model=mod, regen_mode='normal')
# Algorithms: Fickian diffusion
fd = op.algorithms.TransientFickianDiffusion(network=net, phase=phase)
fd.set_value_BC(pores=net.pores('front'), values=0.5)
fd.set_value_BC(pores=net.pores('back'), values=0.1)
fd.run(x0=0, tspan=(0, 100), saveat=10)
phase.update(fd.results())
# Output results to a vtk file
phase.update(fd.results())
proj.export_data(phases=[phase], filename='out', filetype='xdmf')
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