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[FEM] add example for magnetodynamic 2D equation

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Uwe
2023-02-23 03:03:06 +01:00
parent 21369f227f
commit 486970b90d
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1
src/Mod/Fem/CMakeLists.txt
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@@ -80,6 +80,7 @@ SET(FemExamples_SRCS
femexamples/equation_flow_elmer_2D.py
femexamples/equation_flux_elmer.py
femexamples/equation_magnetodynamics_elmer.py
femexamples/equation_magnetodynamics_2D_elmer.py
femexamples/frequency_beamsimple.py
femexamples/manager.py
femexamples/material_multiple_bendingbeam_fiveboxes.py

290
src/Mod/Fem/femexamples/equation_magnetodynamics_2D_elmer.py Normal file
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@@ -0,0 +1,290 @@
# ***************************************************************************
# * Copyright (c) 2023 Uwe Stöhr <uwestoehr@lyx.org> *
# * *
# * This file is part of the FreeCAD CAx development system. *
# * *
# * This program is free software; you can redistribute it and/or modify *
# * it under the terms of the GNU Lesser General Public License (LGPL) *
# * as published by the Free Software Foundation; either version 2 of *
# * the License, or (at your option) any later version. *
# * for detail see the LICENCE text file. *
# * *
# * This program is distributed in the hope that it will be useful, *
# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
# * GNU Library General Public License for more details. *
# * *
# * You should have received a copy of the GNU Library General Public *
# * License along with this program; if not, write to the Free Software *
# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
# * USA *
# * *
# ***************************************************************************
import sys
import FreeCAD
from FreeCAD import Placement
from FreeCAD import Rotation
from FreeCAD import Vector
import Draft
import ObjectsFem
from BOPTools import SplitFeatures
from . import manager
from .manager import get_meshname
from .manager import init_doc
def get_information():
return {
"name": "Inductive heating - Elmer 2D",
"meshtype": "solid",
"meshelement": "Tet10",
"constraints": ["current density"],
"solvers": ["elmer"],
"material": "solid",
"equations": ["magnetodynamic"]
}
def get_explanation(header=""):
return header + """
To run the example from Python console use:
from femexamples.equation_magnetodynamics_2D_elmer import setup
setup()
Magnetodynamic2D equation - Elmer solver
"""
def setup(doc=None, solvertype="elmer"):
# init FreeCAD document
if doc is None:
doc = init_doc()
# explanation object
# just keep the following line and change text string in get_explanation method
manager.add_explanation_obj(doc, get_explanation(manager.get_header(get_information())))
# geometric objects
# wire defining the insulation area
p1 = Vector(0.0, 0.0, 0.0)
p2 = Vector(40.0, 0, 0.0)
p3 = Vector(40.0, 120.0, 0.0)
p4 = Vector(0.0, 120.0, 0.0)
p5 = Vector(0.0, 100.0, 0.0)
p6 = Vector(25.0, 100.0, 0.0)
p7 = Vector(25.0, 20.0, 0.0)
p8 = Vector(0.0, 20.0, 0.0)
Insulation = Draft.make_wire([p1, p2, p3, p4, p5, p6, p7, p8], closed=True)
Insulation.Label = "Insulation"
Insulation.ViewObject.Visibility = False
# wire defining the coil volume
p1 = Vector(50.0, -10.0, 0.0)
p2 = Vector(55.0, -10, 0.0)
p3 = Vector(55.0, 110.0, 0.0)
p4 = Vector(50.0, 110.0, 0.0)
Coil = Draft.make_wire([p1, p2, p3, p4], closed=True)
Coil.Label = "Coil"
Coil.ViewObject.Visibility = False
# wire defining the crucible area
p1 = Vector(0.0, 20.0, 0.0)
p2 = Vector(25.0, 20, 0.0)
p3 = Vector(25.0, 100.0, 0.0)
p4 = Vector(0.0, 100.0, 0.0)
p5 = Vector(0.0, 90.0, 0.0)
p6 = Vector(20.0, 90.0, 0.0)
p7 = Vector(20.0, 30.0, 0.0)
p8 = Vector(0.0, 30.0, 0.0)
Crucible = Draft.make_wire([p1, p2, p3, p4, p5, p6, p7, p8], closed=True)
Crucible.Label = "Crucible"
Crucible.ViewObject.Visibility = False
# wire defining the powder volume
p1 = Vector(0.0, 30.0, 0.0)
p2 = Vector(20.0, 30.0, 0.0)
p3 = Vector(20.0, 40.0, 0.0)
p4 = Vector(0.0, 40.0, 0.0)
Powder = Draft.make_wire([p1, p2, p3, p4], closed=True)
Powder.Label = "Powder"
Powder.ViewObject.Visibility = False
# circle defining later the air volume
Air_Circle = Draft.make_circle(134.536)
Air_Circle.Placement = FreeCAD.Placement(
FreeCAD.Vector(0.0, 60.0, 0.0),
FreeCAD.Rotation(0, 0, 0),
FreeCAD.Vector(0, 0, 1),
)
Air_Circle.Label = "Air_Circle"
Air_Circle.ViewObject.Visibility = False
# wire to cut the air circle
p1 = Vector(0.0, -100.0, 0.0)
p2 = Vector(-140.0, -100.0, 0.0)
p3 = Vector(-140.0, 200.0, 0.0)
p4 = Vector(0.0, 200.0, 0.0)
Air_Rectangle = Draft.make_wire([p1, p2, p3, p4], closed=True)
Air_Rectangle.Label = "Air_Rectangle"
Air_Rectangle.ViewObject.Visibility = False
# a link of the Insulation
InsulationLink = doc.addObject("App::Link", "Link_Insulation")
InsulationLink.LinkTransform = True
InsulationLink.LinkedObject = Insulation
InsulationLink.ViewObject.Visibility = False
# a link of the Coil
CoilLink = doc.addObject("App::Link", "Link_Coil")
CoilLink.LinkTransform = True
CoilLink.LinkedObject = Coil
CoilLink.ViewObject.Visibility = False
# a link of the Crucible
CrucibleLink = doc.addObject("App::Link", "Link_Crucible")
CrucibleLink.LinkTransform = True
CrucibleLink.LinkedObject = Crucible
CrucibleLink.ViewObject.Visibility = False
# a link of the Powder
PowderLink = doc.addObject("App::Link", "Link_Powder")
PowderLink.LinkTransform = True
PowderLink.LinkedObject = Powder
PowderLink.ViewObject.Visibility = False
# fusion of all links
Fusion = doc.addObject("Part::MultiFuse", "Fusion")
Fusion.Shapes = [Air_Rectangle, InsulationLink, CoilLink, CrucibleLink, PowderLink]
Fusion.ViewObject.Visibility = False
# cut all objects from Air wire to get volume of fluid
Cut = doc.addObject("Part::Cut", "Cut_Air")
Cut.Base = Air_Circle
Cut.Tool = Fusion
Cut.ViewObject.Visibility = False
# BooleanFregments object to combine cut with rod
BooleanFragments = SplitFeatures.makeBooleanFragments(name="BooleanFragments")
BooleanFragments.Objects = [Insulation, Coil, Crucible, Powder, Cut]
# set view
doc.recompute()
if FreeCAD.GuiUp:
BooleanFragments.ViewObject.Document.activeView().viewTop()
BooleanFragments.ViewObject.Document.activeView().fitAll()
# analysis
analysis = ObjectsFem.makeAnalysis(doc, "Analysis")
if FreeCAD.GuiUp:
import FemGui
FemGui.setActiveAnalysis(analysis)
# solver
if solvertype == "elmer":
solver_obj = ObjectsFem.makeSolverElmer(doc, "SolverElmer")
solver_obj.CoordinateSystem = "Axi Symmetric"
equation_magnetodynamic2D = ObjectsFem.makeEquationMagnetodynamic2D(doc, solver_obj)
equation_magnetodynamic2D.AngularFrequency = "50 kHz"
equation_magnetodynamic2D.CalculateCurrentDensity = True
equation_magnetodynamic2D.CalculateElectricField = True
equation_magnetodynamic2D.CalculateJouleHeating = True
equation_magnetodynamic2D.IsHarmonic = True
else:
FreeCAD.Console.PrintWarning(
"Not known or not supported solver type: {}. "
"No solver object was created.\n".format(solvertype)
)
return doc
analysis.addObject(solver_obj)
# materials
# air around the objects and inside the coil
material_obj = ObjectsFem.makeMaterialFluid(doc, "Air")
mat = material_obj.Material
mat["Name"] = "Air"
mat["Density"] = "1.204 kg/m^3"
mat["ThermalConductivity"] = "0.02587 W/m/K"
mat["ThermalExpansionCoefficient"] = "0.00343/K"
mat["SpecificHeat"] = "1010.00 J/kg/K"
mat["ElectricalConductivity"] = "1e-12 S/m"
mat["RelativePermeability"] = "1.0"
mat["RelativePermittivity"] = "1.00059"
material_obj.Material = mat
material_obj.References = [
(BooleanFragments, "Face2"),
(BooleanFragments, "Face5"),
(BooleanFragments, "Face6")]
analysis.addObject(material_obj)
# graphite of the crucible
material_obj = ObjectsFem.makeMaterialSolid(doc, "Material-Crucible")
mat = material_obj.Material
mat["Name"] = "Graphite"
mat["ElectricalConductivity"] = "2e4 S/m"
mat["RelativePermeability"] = "1.0"
material_obj.Material = mat
material_obj.References = [(BooleanFragments, "Face3")]
analysis.addObject(material_obj)
# insulation of the crucible
material_obj = ObjectsFem.makeMaterialSolid(doc, "Material-Insulation")
mat = material_obj.Material
mat["Name"] = "Insulation"
mat["ElectricalConductivity"] = "2.0e3 S/m"
mat["RelativePermeability"] = "1.0"
material_obj.Material = mat
material_obj.References = [(BooleanFragments, "Face1")]
analysis.addObject(material_obj)
# mmaterial of powder
material_obj = ObjectsFem.makeMaterialSolid(doc, "Material-Powder")
mat = material_obj.Material
mat["Name"] = "Powder"
mat["ElectricalConductivity"] = "1e4 S/m"
mat["RelativePermeability"] = "1.0"
material_obj.Material = mat
material_obj.References = [(BooleanFragments, "Face4")]
analysis.addObject(material_obj)
# constraint inlet velocity
CurrentDensity = ObjectsFem.makeConstraintCurrentDensity(doc, "CurrentDensity")
CurrentDensity.References = [(BooleanFragments, "Face2")]
CurrentDensity.CurrentDensity_re_1 = "250000.000 A/m^2"
CurrentDensity.CurrentDensity_re_1_Disabled = False
analysis.addObject(CurrentDensity)
# mesh
femmesh_obj = analysis.addObject(ObjectsFem.makeMeshGmsh(doc, get_meshname()))[0]
femmesh_obj.Part = BooleanFragments
femmesh_obj.CharacteristicLengthMax = "3 mm"
femmesh_obj.ViewObject.Visibility = False
# mesh_region
mesh_region = ObjectsFem.makeMeshRegion(doc, femmesh_obj, name="MeshRegion")
mesh_region.CharacteristicLength = "1 mm"
mesh_region.References = [
(BooleanFragments, "Face1"),
(BooleanFragments, "Face2"),
(BooleanFragments, "Face3"),
(BooleanFragments, "Face4")]
mesh_region.ViewObject.Visibility = False
# generate the mesh
from femmesh import gmshtools
gmsh_mesh = gmshtools.GmshTools(femmesh_obj, analysis)
try:
error = gmsh_mesh.create_mesh()
except Exception:
error = sys.exc_info()[1]
FreeCAD.Console.PrintError(
"Unexpected error when creating mesh: {}\n"
.format(error)
)
doc.recompute()
return doc

2
src/Mod/Fem/femexamples/manager.py
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@@ -73,6 +73,7 @@ def run_all():
run_example("equation_flow_elmer_2D", run_solver=True)
run_example("equation_flux_elmer", run_solver=True)
run_example("equation_magnetodynamics_elmer", run_solver=True)
run_example("equation_magnetodynamics_2D_elmer.py", run_solver=True)
run_example("frequency_beamsimple", run_solver=True)
run_example("material_multiple_bendingbeam_fiveboxes", run_solver=True)
run_example("material_multiple_bendingbeam_fivefaces", run_solver=True)
@@ -108,6 +109,7 @@ def setup_all():
run_example("equation_flow_elmer_2D")
run_example("equation_flux_elmer")
run_example("equation_magnetodynamics_elmer")
run_example("equation_magnetodynamics_2D_elmer.py")
run_example("frequency_beamsimple")
run_example("material_multiple_bendingbeam_fiveboxes")
run_example("material_multiple_bendingbeam_fivefaces")