def test_pickle_surface_fespaces():
import netgen.meshing as meshing
import netgen.csg as csg
geo = csg.CSGeometry()
bottom = csg.Plane(csg.Pnt(0, 0, 0), csg.Vec(0, 0, 1))
surface = csg.SplineSurface(bottom)
pts = [(0, 0, 0), (0, 1, 0), (1, 1, 0), (1, 0, 0)]
geopts = [surface.AddPoint(*p) for p in pts]
for p1, p2, bc in [(0, 1, "left"), (1, 2, "top"), (2, 3, "right"),
(3, 0, "bottom")]:
surface.AddSegment(geopts[p1], geopts[p2], bc)
geo.AddSplineSurface(surface)
mesh = Mesh(
geo.GenerateMesh(maxh=0.3,
perfstepsend=meshing.MeshingStep.MESHSURFACE))
spaces = [
HDivDivSurface(mesh, order=3, dirichlet=[1, 2, 3, 4]),
FacetSurface(mesh, order=3, dirichlet=[1, 2, 3, 4]),
HDivSurface(mesh, order=3, dirichlet=[1, 2, 3, 4])
]
for space in spaces:
with io.BytesIO() as f:
pickler = pickle.Pickler(f)
pickler.dump(space)
data = f.getvalue()
with io.BytesIO(data) as f:
unpickler = pickle.Unpickler(f)
space2 = unpickler.load()
assert space.ndof == space2.ndof
def test_SurfaceGetFE(quads=False):
# 2d surface in 3d tests
import netgen.meshing as meshing
import netgen.csg as csg
geo = csg.CSGeometry()
bottom = csg.Plane(csg.Pnt(0, 0, 0), csg.Vec(0, 0, 1))
surface = csg.SplineSurface(bottom)
pts = [(0, 0, 0), (0, 1, 0), (1, 1, 0), (1, 0, 0)]
geopts = [surface.AddPoint(*p) for p in pts]
for p1, p2, bc in [(0, 1, "left"), (1, 2, "top"), (2, 3, "right"),
(3, 0, "bottom")]:
surface.AddSegment(geopts[p1], geopts[p2], bc)
geo.AddSplineSurface(surface)
mesh = Mesh(
geo.GenerateMesh(perfstepsend=meshing.MeshingStep.MESHSURFACE,
quad=quads))
for spacename in surfacespaces.keys():
if quads and spaces2d[spacename]["quad"]:
for order in surfacespaces[spacename]["order"]:
space = FESpace(type=spacename, mesh=mesh, order=order)
for vb in surfacespaces[spacename]["vorb"]:
for el in space.Elements(vb):
assert space.GetFE(el).ndof == len(
space.GetDofNrs(el)), [spacename, vb, order]
return
def gen_3dbeam(maxh, nref, comm, lens=[10, 1, 1]):
b = csg.OrthoBrick(csg.Pnt(-1, 0, 0), csg.Pnt(lens[0], lens[1],
lens[2])).bc("other")
p = csg.Plane(csg.Pnt(0, 0, 0), csg.Vec(-1, 0, 0)).bc("left")
geo = csg.CSGeometry()
geo.Add(b * p)
return gen_ref_mesh(geo, maxh, nref, comm)
def __init__(self, zero, normal, *, eps=csg_eps):
value = numpy.array(zero).dot(numpy.array(normal))
super().__init__(
netgen_csg.Plane(netgen_csg.Pnt(*zero), netgen_csg.Vec(*normal)),
csg_boundaries=[
dolfin.CompiledSubDomain(
'on_boundary && near(x[0]*n0 + x[1]*n1 + x[2]*n2, value, eps)',
n0=normal[0],
n1=normal[1],
n2=normal[2],
value=value,
eps=eps)
])
def cube_geo():
origin = csg.Pnt(0, 0, 0)
side = 1
box = csg.OrthoBrick(origin, csg.Pnt(side, 2 * side,
side)).bc('cube_outer')
normal_vec = csg.Vec(0, 1, 0)
topplane = csg.Plane(csg.Pnt(0, 1, 0), normal_vec).bc('dirichlet')
cube = (box * topplane).mat('cube_mat')
cube_geom = csg.CSGeometry()
cube_geom.Add(cube)
return cube_geom
def hinges_3d(N=4, touch=True):
geo = csg.CSGeometry()
plane_left = csg.Plane(csg.Pnt(0, 0, 0), csg.Vec(-1, 0, 0)).bc("left")
plane_right = csg.Plane(csg.Pnt(1, 0, 0), csg.Vec(1, 0, 0)).bc("outer")
plane_bot = csg.Plane(csg.Pnt(0, 0, 0), csg.Vec(0, -1, 0)).bc("outer")
plane_top = csg.Plane(csg.Pnt(0, 1, 0), csg.Vec(0, 1, 0)).bc("outer")
plane_back = csg.Plane(csg.Pnt(0, 0, 0), csg.Vec(0, 0, -1)).bc("outer")
plane_front = csg.Plane(csg.Pnt(0, 0, 1), csg.Vec(0, 0, 1)).bc("outer")
box = csg.OrthoBrick(csg.Pnt(-0.1, -0.1, -0.1),
csg.Pnt(1, 1, 1)).mat("mat_a").bc("outer")
# N hinges, so N+1 boxes, or N+2 if we do not want to touch diri
h = 1 / (N + 1)
hinges = list()
if touch:
h0 = csg.OrthoBrick(csg.Pnt(-0.1, -0.1, -0.1),
csg.Pnt(h, h, 1.1)).mat("mat_b").bc("inner")
hinges.append(h0)
rmin = 1
rmax = N
hinges = hinges + [
csg.OrthoBrick(csg.Pnt(k * h, k * h, -0.1),
csg.Pnt((k + 1) * h,
(k + 1) * h, 1.1)).mat("mat_b").bc("inner")
for k in range(rmin, rmax)
]
hl = csg.OrthoBrick(csg.Pnt(N * h, N * h, -0.1),
csg.Pnt(1.1, 1.1, 1.1)).mat("mat_b").bc("inner")
hinges.append(hl)
bmh = box - hinges[0]
hs = hinges[0]
for h in hinges[1:]:
hs = hs + h
bmh = bmh - h
geo.Add(bmh * plane_left * plane_right * plane_bot * plane_top *
plane_back * plane_front)
geo.Add(hs * plane_left * plane_right * plane_bot * plane_top *
plane_back * plane_front)
return geo
def save(cls,
network,
phases=[],
filename='',
maxsize='auto',
fileformat='STL Format',
logger_level=0):
r"""
Saves (transient/steady-state) data from the given objects into the
specified file.
Parameters
----------
network : OpenPNM Network Object.
The network containing the desired data.
phases : list of OpenPNM Phase Objects (place holder, default is none).
filename : string (optional).
The name of the file containing the data to export.
maxsize : a float or a string "auto" (optional).
The maximum size of the mesh elements allowed. "auto" corresponds
to an automatic determination based on pores and throats sizes. Any
float value will be used as a maximum size. Small values result in
finner meshes, but slower mesh calculations.
fileformat : string (optional).
Default is "STL Format" which corresponds to STL format. Other
formats such as Gmsh and Fluent are supported (see ngsolve.org).
logger_level : integer between 0 and 7 (optional).
Default is 0. The logger level set in netgen package.
Notes
-----
This method only saves the geometry of the network, not any of the
pore-scale models or other attributes. To save an actual OpenPNM
Project use the ``Workspace`` object.
"""
try:
import netgen.csg as csg
except ModuleNotFoundError:
logger.error('Module "netgen.csg" not found.')
try:
from netgen.meshing import SetMessageImportance as log
log(logger_level)
except ModuleNotFoundError:
logger.warning('Module "netgen.meshing" not found. ' +
'The "logger_level" ignored.')
project, network, phases = cls._parse_args(network=network,
phases=phases)
network = network[0]
if filename == '':
filename = project.name
path = cls._parse_filename(filename=filename, ext='stl')
# Path is a pathlib object, so slice it up as needed
fname_stl = path.name
# correct connections where 'pore.diameter' = 'throat.diameter'
dt = network['throat.diameter'].copy()
dp = network['pore.diameter'][network['throat.conns']]
dt[dp[:, 0] == dt] *= 0.99
dt[dp[:, 1] == dt] *= 0.99
scale = max(network['pore.diameter'].max(), dt.max(),
network['throat.length'].max())
if maxsize == 'auto':
maxsize = min(network['pore.diameter'].min(), dt.min(),
network['throat.length'].min())
geo = csg.CSGeometry()
# define pores
geometry = csg.Sphere(
csg.Pnt(network['pore.coords'][0, 0] / scale,
network['pore.coords'][0, 1] / scale,
network['pore.coords'][0, 2] / scale),
network['pore.diameter'][0] / scale / 2)
for p in range(1, network.Np):
pore = csg.Sphere(
csg.Pnt(network['pore.coords'][p, 0] / scale,
network['pore.coords'][p, 1] / scale,
network['pore.coords'][p, 2] / scale),
network['pore.diameter'][p] / scale / 2)
geometry += pore
# define throats
for t in range(network.Nt):
A = network['throat.endpoints.tail'][t, :] / scale
B = network['throat.endpoints.head'][t, :] / scale
V = (B - A) / _np.linalg.norm(B - A)
plane1 = csg.Plane(csg.Pnt(A[0], A[1], A[2]),
csg.Vec(-V[0], -V[1], -V[2]))
plane2 = csg.Plane(csg.Pnt(B[0], B[1], B[2]),
csg.Vec(V[0], V[1], V[2]))
cylinder = csg.Cylinder(csg.Pnt(A[0], A[1], A[2]),
csg.Pnt(B[0], B[1], B[2]),
dt[t] / scale / 2)
throat = cylinder * plane1 * plane2
geometry += throat
# add pore and throats to geometry, build mesh, rescale, and export
geo.Add(geometry)
mesh = geo.GenerateMesh(maxh=maxsize / scale)
mesh.Scale(scale)
mesh.Export(filename=fname_stl, format=fileformat)
