def writePartFile(self):
""" Construct multi-element STL based on mesh part faces. """
if self.mesh_obj.MeshUtility == "gmsh":
self.part_obj.Shape.exportBrep(self.temp_file_shape)
else:
if ("Boolean" in self.part_obj.Name) and self.mesh_obj.MeshUtility:
FreeCAD.Console.PrintError(
'cfMesh and snappyHexMesh do not accept boolean fragments.'
)
with open(self.temp_file_geo, 'w') as fullMeshFile:
for (i, objFaces) in enumerate(self.part_obj.Shape.Faces):
faceName = ("face{}".format(i))
CfdTools.cfdMessage("Triangulating part: {}:{} ...".format(
self.part_obj.Label, faceName))
mesh_stl = MeshPart.meshFromShape(
objFaces,
LinearDeflection=self.mesh_obj.STLLinearDeflection)
CfdTools.cfdMessage(" writing to file\n")
fullMeshFile.write("solid {}\n".format(faceName))
for face in mesh_stl.Facets:
n = face.Normal
fullMeshFile.write(" facet normal {} {} {}\n".format(
n[0], n[1], n[2]))
fullMeshFile.write(" outer loop\n")
for j in range(3):
p = face.Points[j]
fullMeshFile.write(" vertex {} {} {}".format(
self.scale * p[0], self.scale * p[1],
self.scale * p[2]))
fullMeshFile.write("\n")
fullMeshFile.write(" endloop\n")
fullMeshFile.write(" endfacet\n")
fullMeshFile.write("endsolid {}\n".format(faceName))
def writePartFile(self):
""" Construct multi-element STL based on mesh part faces. """
if self.mesh_obj.MeshUtility == "gmsh":
self.part_obj.Shape.exportBrep(self.temp_file_shape)
else:
if ("Boolean" in self.part_obj.Name) and self.mesh_obj.MeshUtility:
FreeCAD.Console.PrintError(
'cfMesh and snappyHexMesh do not accept boolean fragments.'
)
with open(self.temp_file_geo, 'w') as fid:
for k in range(len(self.patch_faces)):
for l in range(len(self.patch_faces[k])):
patch_faces = self.patch_faces[k][l]
patch_name = self.patch_names[k][l]
if len(patch_faces):
# Put together the faces making up this patch; mesh them and output to file
patch_shape = Part.makeCompound([
self.mesh_obj.Part.Shape.Faces[f]
for f in patch_faces
])
CfdTools.cfdMessage(
"Triangulating part {}, patch {} ...".format(
self.part_obj.Label, patch_name))
mesh_stl = MeshPart.meshFromShape(
patch_shape,
LinearDeflection=self.mesh_obj.
STLLinearDeflection)
CfdTools.cfdMessage(" writing to file\n")
CfdTools.writePatchToStl(patch_name, mesh_stl, fid,
self.scale)
def writeMeshCase(self):
""" Collect case settings, and finally build a runnable case. """
CfdTools.cfdMessage(
"Populating mesh dictionaries in folder {}\n".format(
self.meshCaseDir))
if self.mesh_obj.MeshUtility == "cfMesh":
self.cf_settings['ClMax'] = self.clmax * self.scale
if len(self.cf_settings['BoundaryLayers']) > 0:
self.cf_settings['BoundaryLayerPresent'] = True
else:
self.cf_settings['BoundaryLayerPresent'] = False
if len(self.cf_settings["InternalRegions"]) > 0:
self.cf_settings['InternalRefinementRegionsPresent'] = True
else:
self.cf_settings['InternalRefinementRegionsPresent'] = False
elif self.mesh_obj.MeshUtility == "snappyHexMesh":
bound_box = self.part_obj.Shape.BoundBox
bC = 5 # Number of background mesh buffer cells
x_min = (bound_box.XMin - bC * self.clmax) * self.scale
x_max = (bound_box.XMax + bC * self.clmax) * self.scale
y_min = (bound_box.YMin - bC * self.clmax) * self.scale
y_max = (bound_box.YMax + bC * self.clmax) * self.scale
z_min = (bound_box.ZMin - bC * self.clmax) * self.scale
z_max = (bound_box.ZMax + bC * self.clmax) * self.scale
cells_x = int(math.ceil(bound_box.XLength / self.clmax) + 2 * bC)
cells_y = int(math.ceil(bound_box.YLength / self.clmax) + 2 * bC)
cells_z = int(math.ceil(bound_box.ZLength / self.clmax) + 2 * bC)
snappy_settings = self.snappy_settings
snappy_settings['BlockMesh'] = {
"xMin": x_min,
"xMax": x_max,
"yMin": y_min,
"yMax": y_max,
"zMin": z_min,
"zMax": z_max,
"cellsX": cells_x,
"cellsY": cells_y,
"cellsZ": cells_z
}
inside_x = Units.Quantity(
self.mesh_obj.PointInMesh.get('x')).Value * self.scale
inside_y = Units.Quantity(
self.mesh_obj.PointInMesh.get('y')).Value * self.scale
inside_z = Units.Quantity(
self.mesh_obj.PointInMesh.get('z')).Value * self.scale
shape_face_names_list = []
for i in self.mesh_obj.ShapeFaceNames:
shape_face_names_list.append(i)
snappy_settings['ShapeFaceNames'] = tuple(shape_face_names_list)
snappy_settings[
'EdgeRefinementLevel'] = CfdTools.relLenToRefinementLevel(
self.mesh_obj.EdgeRefinement)
snappy_settings['PointInMesh'] = {
"x": inside_x,
"y": inside_y,
"z": inside_z
}
snappy_settings[
'CellsBetweenLevels'] = self.mesh_obj.CellsBetweenLevels
if len(self.snappy_settings["InternalRegions"]) > 0:
self.snappy_settings['InternalRefinementRegionsPresent'] = True
else:
self.snappy_settings[
'InternalRefinementRegionsPresent'] = False
elif self.mesh_obj.MeshUtility == "gmsh":
if platform.system() == "Windows":
exe = os.path.join(FreeCAD.getHomePath(), 'bin', 'gmsh.exe')
else:
exe = subprocess.check_output(
["which", "gmsh"], universal_newlines=True).rstrip('\n')
self.gmsh_settings['Executable'] = CfdTools.translatePath(exe)
self.gmsh_settings['ShapeFile'] = self.temp_file_shape
self.gmsh_settings['HasLengthMap'] = False
if self.ele_length_map:
self.gmsh_settings['HasLengthMap'] = True
self.gmsh_settings['LengthMap'] = self.ele_length_map
self.gmsh_settings['NodeMap'] = {}
for e in self.ele_length_map:
ele_nodes = (''.join(
(str(n + 1) + ', ')
for n in self.ele_node_map[e])).rstrip(', ')
self.gmsh_settings['NodeMap'][e] = ele_nodes
self.gmsh_settings['ClMax'] = self.clmax
self.gmsh_settings['ClMin'] = self.clmin
sols = (''.join(
(str(n + 1) + ', ')
for n in range(len(self.mesh_obj.Part.Shape.Solids)))
).rstrip(', ')
self.gmsh_settings['Solids'] = sols
self.gmsh_settings['BoundaryFaceMap'] = {}
# Write one boundary per face
for i in range(len(self.mesh_obj.Part.Shape.Faces)):
self.gmsh_settings['BoundaryFaceMap']['face' + str(i)] = i + 1
self.gmsh_settings['MeshFile'] = self.temp_file_mesh
# Perform initialisation here rather than __init__ in case of path changes
self.template_path = os.path.join(CfdTools.get_module_path(), "data",
"defaultsMesh")
mesh_region_present = False
if self.mesh_obj.MeshUtility == "cfMesh" and len(self.cf_settings['MeshRegions']) > 0 or \
self.mesh_obj.MeshUtility == "snappyHexMesh" and len(self.snappy_settings['MeshRegions']) > 0:
mesh_region_present = True
self.settings = {
'Name': self.part_obj.Name,
'MeshPath': self.meshCaseDir,
'FoamRuntime': CfdTools.getFoamRuntime(),
'MeshUtility': self.mesh_obj.MeshUtility,
'MeshRegionPresent': mesh_region_present,
'CfSettings': self.cf_settings,
'SnappySettings': self.snappy_settings,
'GmshSettings': self.gmsh_settings,
'TwoDSettings': self.two_d_settings
}
if CfdTools.getFoamRuntime() != 'WindowsDocker':
self.settings['TranslatedFoamPath'] = CfdTools.translatePath(
CfdTools.getFoamDir())
if self.mesh_obj.NumberOfProcesses <= 1:
self.mesh_obj.NumberOfProcesses = 1
self.settings['ParallelMesh'] = False
else:
self.settings['ParallelMesh'] = True
self.settings['NumberOfProcesses'] = self.mesh_obj.NumberOfProcesses
self.settings['NumberOfThreads'] = self.mesh_obj.NumberOfThreads
TemplateBuilder.TemplateBuilder(self.meshCaseDir, self.template_path,
self.settings)
# Update Allmesh permission - will fail silently on Windows
fname = os.path.join(self.meshCaseDir, "Allmesh")
import stat
s = os.stat(fname)
os.chmod(fname, s.st_mode | stat.S_IEXEC)
CfdTools.cfdMessage(
"Successfully wrote meshCase to folder {}\n".format(
self.meshCaseDir))
def processRefinements(self):
""" Process mesh refinements """
mr_objs = CfdTools.getMeshRefinementObjs(self.mesh_obj)
if self.mesh_obj.MeshUtility == "gmsh":
# mesh regions
self.ele_length_map = {} # { 'ElementString' : element length }
self.ele_node_map = {} # { 'ElementString' : [element nodes] }
if not mr_objs:
print(' No mesh refinements')
else:
print(' Mesh refinements found - getting elements')
if self.part_obj.Shape.ShapeType == 'Compound':
# see http://forum.freecadweb.org/viewtopic.php?f=18&t=18780&start=40#p149467 and http://forum.freecadweb.org/viewtopic.php?f=18&t=18780&p=149520#p149520
err = "GMSH could return unexpected meshes for a boolean split tools Compound. It is strongly recommended to extract the shape to mesh from the Compound and use this one."
FreeCAD.Console.PrintError(err + "\n")
for mr_obj in mr_objs:
if mr_obj.RelativeLength:
if mr_obj.References:
for sub in mr_obj.References:
# Check if the shape of the mesh region is an element of the Part to mesh;
# if not try to find the element in the shape to mesh
search_ele_in_shape_to_mesh = False
ref = FreeCAD.ActiveDocument.getObject(sub[0])
if not self.part_obj.Shape.isSame(ref.Shape):
search_ele_in_shape_to_mesh = True
elems = sub[1]
if search_ele_in_shape_to_mesh:
# Try to find the element in the Shape to mesh
ele_shape = FemGeomTools.get_element(
ref, elems
) # the method getElement(element) does not return Solid elements
found_element = CfdTools.findElementInShape(
self.part_obj.Shape, ele_shape)
if found_element:
elems = found_element
else:
FreeCAD.Console.PrintError(
"One element of the meshregion " +
mr_obj.Name +
" could not be found in the Part to mesh. It will be ignored.\n"
)
elems = None
if elems:
if elems not in self.ele_length_map:
# self.ele_length_map[elems] = Units.Quantity(mr_obj.CharacteristicLength).Value
mr_rellen = mr_obj.RelativeLength
if mr_rellen > 1.0:
mr_rellen = 1.0
FreeCAD.Console.PrintError(
"The meshregion: " +
mr_obj.Name +
" should not use a relative length greater than unity.\n"
)
elif mr_rellen < 0.01:
mr_rellen = 0.01 # Relative length should not be less than 1/100 of base length
FreeCAD.Console.PrintError(
"The meshregion: " +
mr_obj.Name +
" should not use a relative length smaller than 0.01.\n"
)
self.ele_length_map[
elems] = mr_rellen * self.clmax
else:
FreeCAD.Console.PrintError(
"The element " + elems +
" of the mesh refinement " +
mr_obj.Name +
" has been added to another mesh refinement.\n"
)
else:
FreeCAD.Console.PrintError(
"The meshregion: " + mr_obj.Name +
" is not used to create the mesh because the reference list is empty.\n"
)
else:
FreeCAD.Console.PrintError(
"The meshregion: " + mr_obj.Name +
" is not used to create the mesh because the CharacteristicLength is 0.0 mm.\n"
)
for eleml in self.ele_length_map:
ele_shape = FemGeomTools.get_element(
self.part_obj, eleml
) # the method getElement(element) does not return Solid elements
ele_vertexes = FemGeomTools.get_vertexes_by_element(
self.part_obj.Shape, ele_shape)
self.ele_node_map[eleml] = ele_vertexes
else:
cf_settings = self.cf_settings
cf_settings['MeshRegions'] = {}
cf_settings['BoundaryLayers'] = {}
cf_settings['InternalRegions'] = {}
snappy_settings = self.snappy_settings
snappy_settings['MeshRegions'] = {}
snappy_settings['InternalRegions'] = {}
from collections import defaultdict
ele_meshpatch_map = defaultdict(list)
if not mr_objs:
print(' No mesh refinement')
else:
print(' Mesh refinements - getting the elements')
if "Boolean" in self.part_obj.Name:
err = "Cartesian meshes should not be generated for boolean split compounds."
FreeCAD.Console.PrintError(err + "\n")
# Make list of list of all references for their corresponding mesh object
bl_matched_faces = []
if self.mesh_obj.MeshUtility == 'cfMesh':
CfdTools.cfdMessage("Matching refinement regions")
region_face_list = []
for mr_id, mr_obj in enumerate(mr_objs):
if mr_obj.NumberLayers > 1 and not mr_obj.Internal:
refs = mr_obj.References
for r in refs:
obj = FreeCAD.ActiveDocument.getObject(r[0])
if not obj:
raise RuntimeError(
"Referenced object '{}' not found - object may "
"have been deleted".format(r[0]))
try:
f = obj.Shape.getElement(r[1])
except Part.OCCError:
raise RuntimeError(
"Referenced face '{}:{}' not found - face may "
"have been deleted".format(r[0], r[1]))
region_face_list.append((f, mr_id))
# Make list of all faces in meshed shape with original index
mesh_face_list = \
list(zip(self.mesh_obj.Part.Shape.Faces, range(len(self.mesh_obj.Part.Shape.Faces))))
# Match them up
bl_matched_faces = CfdTools.matchFaces(
region_face_list, mesh_face_list)
for mr_id, mr_obj in enumerate(mr_objs):
Internal = mr_obj.Internal
if mr_obj.RelativeLength:
# Store parameters per region
mr_rellen = mr_obj.RelativeLength
if mr_rellen > 1.0:
mr_rellen = 1.0
FreeCAD.Console.PrintError(
"The meshregion: {} should not use a relative length greater "
"than unity.\n".format(mr_obj.Name))
elif mr_rellen < 0.001:
mr_rellen = 0.001 # Relative length should not be less than 0.1% of base length
FreeCAD.Console.PrintError(
"The meshregion: {} should not use a relative length smaller "
"than 0.001.\n".format(mr_obj.Name))
if not (self.mesh_obj.MeshUtility == 'snappyHexMesh'
and mr_obj.Baffle):
fid = open(
os.path.join(self.triSurfaceDir,
mr_obj.Name + '.stl'), 'w')
snappy_mesh_region_list = []
patch_list = []
for (si, sub) in enumerate(mr_obj.References):
shape = FreeCAD.ActiveDocument.getObject(
sub[0]).Shape
elem = sub[1]
if self.mesh_obj.MeshUtility == 'snappyHexMesh' and mr_obj.Baffle:
# Save baffle references or faces individually
baffle = "{}{}{}".format(
mr_obj.Name, sub[0], elem)
fid = open(
os.path.join(self.triSurfaceDir,
baffle + ".stl"), 'w')
snappy_mesh_region_list.append(baffle)
if elem.startswith(
'Solid'
): # getElement doesn't work with solids for some reason
elt = shape.Solids[int(elem.lstrip('Solid')) -
1]
else:
elt = shape.getElement(elem)
if elt.ShapeType == 'Face' or elt.ShapeType == 'Solid':
CfdTools.cfdMessage(
"Triangulating part: {}:{} ...".format(
FreeCAD.ActiveDocument.getObject(
sub[0]).Label, sub[1]))
facemesh = MeshPart.meshFromShape(
elt,
LinearDeflection=self.mesh_obj.
STLLinearDeflection)
CfdTools.cfdMessage(" writing to file\n")
fid.write("solid {}{}{}\n".format(
mr_obj.Name, sub[0], elem))
for face in facemesh.Facets:
fid.write(" facet normal 0 0 0\n")
fid.write(" outer loop\n")
for i in range(3):
p = [
i * self.scale
for i in face.Points[i]
]
fid.write(
" vertex {} {} {}\n".format(
p[0], p[1], p[2]))
fid.write(" endloop\n")
fid.write(" endfacet\n")
fid.write("endsolid {}{}{}\n".format(
mr_obj.Name, sub[0], elem))
if self.mesh_obj.MeshUtility == 'snappyHexMesh' and mr_obj.Baffle:
fid.close()
if not (self.mesh_obj.MeshUtility == 'snappyHexMesh'
and mr_obj.Baffle):
fid.close()
if self.mesh_obj.MeshUtility == 'cfMesh' and mr_obj.NumberLayers > 1 and not Internal:
for mf in bl_matched_faces:
if mr_id == mf[0]:
sfN = self.mesh_obj.ShapeFaceNames[mf[1]]
ele_meshpatch_map[mr_obj.Name].append(sfN)
patch_list.append(sfN)
# Limit expansion ratio to greater than 1.0 and less than 1.2
expratio = mr_obj.ExpansionRatio
expratio = min(1.2, max(1.0, expratio))
cf_settings['BoundaryLayers'][
self.mesh_obj.
ShapeFaceNames[mf[1]]] = {
'NumberLayers':
mr_obj.NumberLayers,
'ExpansionRatio':
expratio,
'FirstLayerHeight':
self.scale * Units.Quantity(
mr_obj.FirstLayerHeight).Value
}
if self.mesh_obj.MeshUtility == 'cfMesh':
if not Internal:
cf_settings['MeshRegions'][mr_obj.Name] = {
'RelativeLength':
mr_rellen * self.clmax * self.scale,
'RefinementThickness':
self.scale * Units.Quantity(
mr_obj.RefinementThickness).Value,
}
else:
cf_settings['InternalRegions'][mr_obj.Name] = {
'RelativeLength':
mr_rellen * self.clmax * self.scale
}
elif self.mesh_obj.MeshUtility == 'snappyHexMesh':
refinement_level = CfdTools.relLenToRefinementLevel(
mr_obj.RelativeLength)
if not Internal:
if not mr_obj.Baffle:
snappy_mesh_region_list.append(mr_obj.Name)
edge_level = CfdTools.relLenToRefinementLevel(
mr_obj.RegionEdgeRefinement)
for rL in range(len(snappy_mesh_region_list)):
mrName = mr_obj.Name + snappy_mesh_region_list[
rL]
snappy_settings['MeshRegions'][mrName] = {
'RegionName':
snappy_mesh_region_list[rL],
'RefinementLevel':
refinement_level,
'EdgeRefinementLevel':
edge_level,
'MaxRefinementLevel':
max(refinement_level, edge_level),
'Baffle':
mr_obj.Baffle
}
else:
snappy_settings['InternalRegions'][
mr_obj.Name] = {
'RefinementLevel': refinement_level
}
else:
FreeCAD.Console.PrintError(
"The meshregion: " + mr_obj.Name +
" is not used to create the mesh because the "
"CharacteristicLength is 0.0 mm or the reference list is empty.\n"
)
def processRefinements(self):
""" Process mesh refinements """
mr_objs = CfdTools.getMeshRefinementObjs(self.mesh_obj)
if self.mesh_obj.MeshUtility == "gmsh":
# mesh regions
self.ele_length_map = {} # { 'ElementString' : element length }
self.ele_node_map = {} # { 'ElementString' : [element nodes] }
if not mr_objs:
print(' No mesh refinements')
else:
print(' Mesh refinements found - getting elements')
if self.part_obj.Shape.ShapeType == 'Compound':
# see http://forum.freecadweb.org/viewtopic.php?f=18&t=18780&start=40#p149467 and http://forum.freecadweb.org/viewtopic.php?f=18&t=18780&p=149520#p149520
err = "GMSH could return unexpected meshes for a boolean split tools Compound. It is strongly recommended to extract the shape to mesh from the Compound and use this one."
FreeCAD.Console.PrintError(err + "\n")
for mr_obj in mr_objs:
if mr_obj.RelativeLength:
if mr_obj.References:
for sub in mr_obj.References:
# Check if the shape of the mesh region is an element of the Part to mesh;
# if not try to find the element in the shape to mesh
search_ele_in_shape_to_mesh = False
ref = FreeCAD.ActiveDocument.getObject(sub[0])
if not self.part_obj.Shape.isSame(ref.Shape):
search_ele_in_shape_to_mesh = True
elems = sub[1]
if search_ele_in_shape_to_mesh:
# Try to find the element in the Shape to mesh
ele_shape = FemGeomTools.get_element(
ref, elems
) # the method getElement(element) does not return Solid elements
found_element = CfdTools.findElementInShape(
self.part_obj.Shape, ele_shape)
if found_element:
elems = found_element
else:
FreeCAD.Console.PrintError(
"One element of the meshregion " +
mr_obj.Name +
" could not be found in the Part to mesh. It will be ignored.\n"
)
elems = None
if elems:
if elems not in self.ele_length_map:
# self.ele_length_map[elems] = Units.Quantity(mr_obj.CharacteristicLength).Value
mr_rellen = mr_obj.RelativeLength
if mr_rellen > 1.0:
mr_rellen = 1.0
FreeCAD.Console.PrintError(
"The meshregion: " +
mr_obj.Name +
" should not use a relative length greater than unity.\n"
)
elif mr_rellen < 0.01:
mr_rellen = 0.01 # Relative length should not be less than 1/100 of base length
FreeCAD.Console.PrintError(
"The meshregion: " +
mr_obj.Name +
" should not use a relative length smaller than 0.01.\n"
)
self.ele_length_map[
elems] = mr_rellen * self.clmax
else:
FreeCAD.Console.PrintError(
"The element " + elems +
" of the mesh refinement " +
mr_obj.Name +
" has been added to another mesh refinement.\n"
)
else:
FreeCAD.Console.PrintError(
"The meshregion: " + mr_obj.Name +
" is not used to create the mesh because the reference list is empty.\n"
)
else:
FreeCAD.Console.PrintError(
"The meshregion: " + mr_obj.Name +
" is not used to create the mesh because the CharacteristicLength is 0.0 mm.\n"
)
for eleml in self.ele_length_map:
ele_shape = FemGeomTools.get_element(
self.part_obj, eleml
) # the method getElement(element) does not return Solid elements
ele_vertexes = FemGeomTools.get_vertexes_by_element(
self.part_obj.Shape, ele_shape)
self.ele_node_map[eleml] = ele_vertexes
else:
cf_settings = self.cf_settings
cf_settings['MeshRegions'] = {}
cf_settings['BoundaryLayers'] = {}
cf_settings['InternalRegions'] = {}
snappy_settings = self.snappy_settings
snappy_settings['MeshRegions'] = {}
snappy_settings['InternalRegions'] = {}
# Make list of all faces in meshed shape with original index
mesh_face_list = list(
zip(self.mesh_obj.Part.Shape.Faces,
range(len(self.mesh_obj.Part.Shape.Faces))))
# Make list of all boundary references
CfdTools.cfdMessage("Matching boundary patches\n")
bc_group = None
analysis_obj = CfdTools.getParentAnalysisObject(self.mesh_obj)
if not analysis_obj:
analysis_obj = CfdTools.getActiveAnalysis()
if analysis_obj:
bc_group = CfdTools.getCfdBoundaryGroup(analysis_obj)
boundary_face_list = []
for bc_id, bc_obj in enumerate(bc_group):
for ri, ref in enumerate(bc_obj.References):
try:
bf = CfdTools.resolveReference(ref)
except RuntimeError as re:
raise RuntimeError(
"Error processing boundary condition {}: {}".
format(bc_obj.Label, str(re)))
boundary_face_list.append((bf, (bc_id, ref, ri)))
# Match them up to faces in the main geometry
bc_matched_faces = CfdTools.matchFaces(boundary_face_list,
mesh_face_list)
# Make list of all boundary layer mesh regions for cfMesh
bl_matched_faces = []
if self.mesh_obj.MeshUtility == 'cfMesh':
CfdTools.cfdMessage("Matching boundary layer regions\n")
bl_face_list = []
for mr_id, mr_obj in enumerate(mr_objs):
if mr_obj.NumberLayers > 1 and not mr_obj.Internal:
for ri, r in enumerate(mr_obj.References):
try:
f = CfdTools.resolveReference(r)
except RuntimeError as re:
raise RuntimeError(
"Error processing mesh refinement {}: {}".
format(mr_obj.Label, str(re)))
bl_face_list.append((f, (mr_id, r, ri)))
# Match them up
bl_matched_faces = CfdTools.matchFaces(bl_face_list,
mesh_face_list)
# Check for and filter duplicates
bc_match_per_shape_face = [-1] * len(mesh_face_list)
for k in range(len(bc_matched_faces)):
match = bc_matched_faces[k][1]
prev_k = bc_match_per_shape_face[match]
if prev_k >= 0:
nb, bref, ri = bc_matched_faces[k][0]
nb2, bref2, ri2 = bc_matched_faces[prev_k][0]
CfdTools.cfdMessage(
"Boundary '{}' reference {}:{} also assigned as "
"boundary '{}' reference {}:{} - ignoring duplicate\n".
format(bc_group[nb].Label, bref[0], bref[1],
bc_group[nb2].Label, bref2[0], bref2[1]))
else:
bc_match_per_shape_face[match] = k
bl_match_per_shape_face = [-1] * len(mesh_face_list)
for k in range(len(bl_matched_faces)):
match = bl_matched_faces[k][1]
prev_k = bl_match_per_shape_face[match]
if prev_k >= 0:
nr, ref, ri = bl_matched_faces[k][0]
nr2, ref2, ri2 = bl_matched_faces[prev_k][0]
CfdTools.cfdMessage(
"Mesh refinement '{}' reference {}:{} also assigned as "
"mesh refinement '{}' reference {}:{} - ignoring duplicate\n"
.format(mr_objs[nr].Label, ref[0], ref[1],
mr_objs[nr2].Label, ref2[0], ref2[1]))
else:
bl_match_per_shape_face[match] = k
self.patch_faces = []
self.patch_names = []
for k in range(len(bc_group) + 1):
self.patch_faces.append([])
self.patch_names.append([])
for l in range(len(mr_objs) + 1):
self.patch_faces[k].append([])
self.patch_names[k].append("patch_" + str(k) + "_" +
str(l))
for i in range(len(mesh_face_list)):
k = bc_match_per_shape_face[i]
l = bl_match_per_shape_face[i]
nb = -1
nr = -1
if k >= 0:
nb, bref, bri = bc_matched_faces[k][0]
if l >= 0:
nr, ref, rri = bl_matched_faces[l][0]
self.patch_faces[nb + 1][nr + 1].append(i)
# Additionally for snappy, match baffles to any surface mesh refinements
# as well as matching each surface mesh refinement region to boundary conditions
mr_face_list = []
bc_mr_matched_faces = []
if self.mesh_obj.MeshUtility == 'snappyHexMesh':
CfdTools.cfdMessage("Matching surface geometries\n")
for mr_id, mr_obj in enumerate(mr_objs):
if not mr_obj.Internal:
for ri, r in enumerate(mr_obj.References):
try:
f = CfdTools.resolveReference(r)
except RuntimeError as re:
raise RuntimeError(
"Error processing mesh refinement {}: {}".
format(mr_obj.Label, str(re)))
mr_face_list.append((f, (mr_id, r, ri)))
# Match mesh regions to the boundary conditions, to identify boundary conditions on supplementary
# geometry (including on baffles)
bc_mr_matched_faces = CfdTools.matchFaces(
boundary_face_list, mr_face_list)
for bc_id, bc_obj in enumerate(bc_group):
if bc_obj.BoundaryType == 'baffle':
baffle_matches = [
m for m in bc_mr_matched_faces if m[0][0] == bc_id
]
mr_match_per_baffle_ref = [-1] * len(bc_obj.References)
for m in baffle_matches:
mr_match_per_baffle_ref[m[0][2]] = m[1][0]
# For each mesh region, the refs that are part of this baffle
baffle_patch_refs = [[] for ri in range(len(mr_objs) + 1)]
for ri, mri in enumerate(mr_match_per_baffle_ref):
baffle_patch_refs[mri + 1].append(
bc_obj.References[ri])
# Write these geometries
for ri, refs in enumerate(baffle_patch_refs):
try:
shape = CfdTools.makeShapeFromReferences(refs)
except RuntimeError as re:
raise RuntimeError(
"Error processing baffle {}: {}".format(
bc_obj.Label, str(re)))
solid_name = bc_obj.Name + "_" + str(ri)
if shape:
CfdTools.cfdMessage(
"Triangulating baffle {}, section {} ...".
format(bc_obj.Label, ri))
facemesh = MeshPart.meshFromShape(
shape,
LinearDeflection=self.mesh_obj.
STLLinearDeflection)
CfdTools.cfdMessage(" writing to file\n")
with open(
os.path.join(self.triSurfaceDir,
solid_name + '.stl'),
'w') as fid:
CfdTools.writePatchToStl(
solid_name, facemesh, fid, self.scale)
if ri > 0: # The parts of the baffle corresponding to a surface mesh region obj
mr_obj = mr_objs[ri - 1]
refinement_level = CfdTools.relLenToRefinementLevel(
mr_obj.RelativeLength)
edge_level = CfdTools.relLenToRefinementLevel(
mr_obj.RegionEdgeRefinement)
else: # The parts of the baffle with no refinement obj
refinement_level = 0
edge_level = 0
snappy_settings['MeshRegions'][solid_name] = {
'RefinementLevel':
refinement_level,
'EdgeRefinementLevel':
edge_level,
'MaxRefinementLevel':
max(refinement_level, edge_level),
'Baffle':
True
}
mr_matched_faces = []
if self.mesh_obj.MeshUtility == 'snappyHexMesh':
# Match mesh regions to the primary geometry
mr_matched_faces = CfdTools.matchFaces(mr_face_list,
mesh_face_list)
for mr_id, mr_obj in enumerate(mr_objs):
Internal = mr_obj.Internal
mr_rellen = mr_obj.RelativeLength
if mr_rellen > 1.0:
mr_rellen = 1.0
FreeCAD.Console.PrintError(
"The mesh refinement region '{}' should not use a relative length greater "
"than unity.\n".format(mr_obj.Name))
elif mr_rellen < 0.001:
mr_rellen = 0.001 # Relative length should not be less than 0.1% of base length
FreeCAD.Console.PrintError(
"The mesh refinement region '{}' should not use a relative length smaller "
"than 0.001.\n".format(mr_obj.Name))
# Find any matches with boundary conditions; mark those matching baffles for removal
bc_matches = [
m for m in bc_mr_matched_faces if m[1][0] == mr_id
]
bc_match_per_mr_ref = [-1] * len(mr_obj.References)
for m in bc_matches:
bc_match_per_mr_ref[m[1][2]] = -2 if bc_group[
m[0][0]].BoundaryType == 'baffle' else m[0][0]
# Unmatch those in primary geometry
main_geom_matches = [
m for m in mr_matched_faces if m[0][0] == mr_id
]
for m in main_geom_matches:
bc_match_per_mr_ref[m[0][2]] = -1
# For each boundary, the refs that are part of this mesh region
mr_patch_refs = [[] for ri in range(len(bc_group) + 1)]
for ri, bci in enumerate(bc_match_per_mr_ref):
if bci > -2:
mr_patch_refs[bci + 1].append(mr_obj.References[ri])
# Loop over and write the sub-sections of this mesh object
for bi in range(len(mr_patch_refs)):
if len(mr_patch_refs[bi]):
if bi == 0:
mr_patch_name = mr_obj.Name
else:
mr_patch_name = self.patch_names[bi][mr_id + 1]
CfdTools.cfdMessage(
"Triangulating mesh refinement region {}, section {} ..."
.format(mr_obj.Label, bi))
try:
shape = CfdTools.makeShapeFromReferences(
mr_patch_refs[bi])
except RuntimeError as re:
raise RuntimeError(
"Error processing mesh refinement region {}: {}"
.format(mr_obj.Label, str(re)))
if shape:
facemesh = MeshPart.meshFromShape(
shape,
LinearDeflection=self.mesh_obj.
STLLinearDeflection)
CfdTools.cfdMessage(" writing to file\n")
with open(
os.path.join(self.triSurfaceDir,
mr_patch_name + '.stl'),
'w') as fid:
CfdTools.writePatchToStl(
mr_patch_name, facemesh, fid, self.scale)
if self.mesh_obj.MeshUtility == 'cfMesh':
if not Internal:
cf_settings['MeshRegions'][mr_patch_name] = {
'RelativeLength':
mr_rellen * self.clmax * self.scale,
'RefinementThickness':
self.scale * Units.Quantity(
mr_obj.RefinementThickness).Value,
}
else:
cf_settings['InternalRegions'][mr_obj.Name] = {
'RelativeLength':
mr_rellen * self.clmax * self.scale
}
elif self.mesh_obj.MeshUtility == 'snappyHexMesh':
refinement_level = CfdTools.relLenToRefinementLevel(
mr_obj.RelativeLength)
if not Internal:
edge_level = CfdTools.relLenToRefinementLevel(
mr_obj.RegionEdgeRefinement)
snappy_settings['MeshRegions'][
mr_patch_name] = {
'RefinementLevel':
refinement_level,
'EdgeRefinementLevel':
edge_level,
'MaxRefinementLevel':
max(refinement_level, edge_level),
'Baffle':
False
}
else:
snappy_settings['InternalRegions'][
mr_patch_name] = {
'RefinementLevel': refinement_level
}
# In addition, for cfMesh, record matched boundary layer patches
if self.mesh_obj.MeshUtility == 'cfMesh' and mr_obj.NumberLayers > 1 and not Internal:
for k in range(len(self.patch_faces)):
# Limit expansion ratio to greater than 1.0 and less than 1.2
expratio = mr_obj.ExpansionRatio
expratio = min(1.2, max(1.0, expratio))
cf_settings['BoundaryLayers'][
self.patch_names[k][mr_id]] = {
'NumberLayers':
mr_obj.NumberLayers,
'ExpansionRatio':
expratio,
'FirstLayerHeight':
self.scale *
Units.Quantity(mr_obj.FirstLayerHeight).Value
}
