#DOC-END define monodomain problem #Create the problem control loop problem.ControlLoopCreateStart() controlLoop = iron.ControlLoop() problem.ControlLoopGet([iron.ControlLoopIdentifiers.NODE], controlLoop) controlLoop.TimesSet(0.0, stimStop, pdeTimeStep) # controlLoop.OutputTypeSet(iron.ControlLoopOutputTypes.TIMING) controlLoop.OutputTypeSet(iron.ControlLoopOutputTypes.NONE) controlLoop.TimeOutputSet(outputFrequency) problem.ControlLoopCreateFinish() #Create the problem solvers daeSolver = iron.Solver() dynamicSolver = iron.Solver() problem.SolversCreateStart() # Get the first DAE solver problem.SolverGet([iron.ControlLoopIdentifiers.NODE], 1, daeSolver) daeSolver.DAESolverTypeSet(integrationMethod) daeSolver.DAETimeStepSet(odeTimeStep) daeSolver.OutputTypeSet(iron.SolverOutputTypes.NONE) # Get the second dynamic solver for the parabolic problem problem.SolverGet([iron.ControlLoopIdentifiers.NODE], 2, dynamicSolver) dynamicSolver.OutputTypeSet(iron.SolverOutputTypes.NONE) problem.SolversCreateFinish() #DOC-START define CellML solver #Create the problem solver CellML equations cellMLEquations = iron.CellMLEquations()
iron.ProblemClasses.ELASTICITY, iron.ProblemTypes.FINITE_ELASTICITY,
iron.ProblemSubtypes.FINITE_ELASTICITY_CELLML
]
problem.CreateStart(problemUserNumber, problemSpecification)
problem.CreateFinish()
#DOC-END define CellML finite elasticity problem
#Create the problem control loop
problem.ControlLoopCreateStart()
ControlLoop = iron.ControlLoop()
problem.ControlLoopGet([iron.ControlLoopIdentifiers.NODE], ControlLoop)
ControlLoop.TypeSet(iron.ProblemControlLoopTypes.SIMPLE)
problem.ControlLoopCreateFinish()
#Create the problem solvers
nonLinearSolver = iron.Solver()
linearSolver = iron.Solver()
problem.SolversCreateStart()
problem.SolverGet([iron.ControlLoopIdentifiers.NODE], 1, nonLinearSolver)
nonLinearSolver.OutputTypeSet(iron.SolverOutputTypes.PROGRESS)
nonLinearSolver.NewtonJacobianCalculationTypeSet(
iron.JacobianCalculationTypes.FD)
nonLinearSolver.NewtonLinearSolverGet(linearSolver)
#Use the DIRECT MUMPS solver
linearSolver.LinearTypeSet(iron.LinearSolverTypes.DIRECT)
#For large problems or problems with complex material behaviour, the direct solver may fail
#In such cases either preconditioners or the following solvers can be tried
#In case the matrix has zeros for some rows, SUPERLU is a good solver to try as it will report such errors
#linearSolver.LibraryTypeSet(iron.SolverLibraries.PASTIX)
#linearSolver.LibraryTypeSet(iron.SolverLibraries.SUPERLU)
problem.SolversCreateFinish()
# Create Laplace problem
problem = iron.Problem()
problemSpecification = [
iron.ProblemClasses.CLASSICAL_FIELD, iron.ProblemTypes.LAPLACE_EQUATION,
iron.ProblemSubtypes.STANDARD_LAPLACE
]
problem.CreateStart(problemUserNumber, problemSpecification)
problem.CreateFinish()
# Create control loops
problem.ControlLoopCreateStart()
problem.ControlLoopCreateFinish()
# Create problem solver
solver = iron.Solver()
problem.SolversCreateStart()
problem.SolverGet([iron.ControlLoopIdentifiers.NODE], 1, solver)
solver.outputType = iron.SolverOutputTypes.SOLVER
solver.linearType = iron.LinearSolverTypes.ITERATIVE
solver.linearIterativeAbsoluteTolerance = 1.0E-12
solver.linearIterativeRelativeTolerance = 1.0E-12
problem.SolversCreateFinish()
# Create solver equations and add equations set to solver equations
solver = iron.Solver()
solverEquations = iron.SolverEquations()
problem.SolverEquationsCreateStart()
problem.SolverGet([iron.ControlLoopIdentifiers.NODE], 1, solver)
solver.SolverEquationsGet(solverEquations)
solverEquations.sparsityType = iron.SolverEquationsSparsityTypes.SPARSE
# Define the problem
problem = iron.Problem()
problemSpecification = [
iron.ProblemClasses.ELASTICITY, iron.ProblemTypes.FINITE_ELASTICITY,
iron.ProblemSubtypes.NONE
]
problem.CreateStart(problemUserNumber, problemSpecification)
problem.CreateFinish()
# Create control loops
problem.ControlLoopCreateStart()
problem.ControlLoopCreateFinish()
# Create problem solver
nonLinearSolver = iron.Solver()
linearSolver = iron.Solver()
problem.SolversCreateStart()
problem.SolverGet([iron.ControlLoopIdentifiers.NODE], 1, nonLinearSolver)
nonLinearSolver.outputType = iron.SolverOutputTypes.PROGRESS
nonLinearSolver.NewtonJacobianCalculationTypeSet(
iron.JacobianCalculationTypes.FD)
nonLinearSolver.NewtonLinearSolverGet(linearSolver)
linearSolver.linearType = iron.LinearSolverTypes.DIRECT
#linearSolver.libraryType = iron.SolverLibraries.LAPACK
problem.SolversCreateFinish()
# Create solver equations and add equations set to solver equations
solver = iron.Solver()
solverEquations = iron.SolverEquations()
problem.SolverEquationsCreateStart()
def LidDriven(numberOfElements, cavityDimensions, lidVelocity, viscosity,
density, outputFilename, transient, RBS, fdJacobian, analytic,
basisList):
""" Sets up the lid driven cavity problem and solves with the provided parameter values
Square Lid-Driven Cavity
v=1
>>>>>>>>>>
1| |
| |
v=0 | | v=0
| |
| |
------------
0 v=0 1
"""
# Create a generated mesh
generatedMesh = iron.GeneratedMesh()
generatedMesh.CreateStart(generatedMeshUserNumber, region)
generatedMesh.type = iron.GeneratedMeshTypes.REGULAR
generatedMesh.basis = basisList
generatedMesh.extent = cavityDimensions
generatedMesh.numberOfElements = numberOfElements
mesh = iron.Mesh()
generatedMesh.CreateFinish(meshUserNumber, mesh)
# Create a decomposition for the mesh
decomposition = iron.Decomposition()
decomposition.CreateStart(decompositionUserNumber, mesh)
decomposition.type = iron.DecompositionTypes.CALCULATED
decomposition.numberOfDomains = numberOfComputationalNodes
decomposition.CreateFinish()
# Create a field for the geometry
geometricField = iron.Field()
geometricField.CreateStart(geometricFieldUserNumber, region)
geometricField.meshDecomposition = decomposition
geometricField.ComponentMeshComponentSet(iron.FieldVariableTypes.U, 1, 1)
geometricField.ComponentMeshComponentSet(iron.FieldVariableTypes.U, 2, 1)
geometricField.CreateFinish()
# Set geometry from the generated mesh
generatedMesh.GeometricParametersCalculate(geometricField)
# Create standard Navier-Stokes equations set
equationsSetField = iron.Field()
equationsSet = iron.EquationsSet()
if RBS:
equationsSetSpecification = [
iron.EquationsSetClasses.FLUID_MECHANICS,
iron.EquationsSetTypes.NAVIER_STOKES_EQUATION,
iron.EquationsSetSubtypes.TRANSIENT_RBS_NAVIER_STOKES
]
else:
equationsSetSpecification = [
iron.EquationsSetClasses.FLUID_MECHANICS,
iron.EquationsSetTypes.NAVIER_STOKES_EQUATION,
iron.EquationsSetSubtypes.TRANSIENT_NAVIER_STOKES
]
equationsSet.CreateStart(equationsSetUserNumber, region, geometricField,
equationsSetSpecification,
equationsSetFieldUserNumber, equationsSetField)
equationsSet.CreateFinish()
if RBS:
# Set max CFL number (default 1.0)
equationsSetField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U1, iron.FieldParameterSetTypes.VALUES, 2,
1.0E20)
# Set time increment (default 0.0)
equationsSetField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U1, iron.FieldParameterSetTypes.VALUES, 3,
transient[2])
# Set stabilisation type (default 1.0 = RBS)
equationsSetField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U1, iron.FieldParameterSetTypes.VALUES, 4,
1.0)
# Create dependent field
dependentField = iron.Field()
equationsSet.DependentCreateStart(dependentFieldUserNumber, dependentField)
dependentField.ComponentMeshComponentSet(iron.FieldVariableTypes.U, 1, 1)
dependentField.ComponentMeshComponentSet(iron.FieldVariableTypes.U, 2, 1)
dependentField.ComponentMeshComponentSet(iron.FieldVariableTypes.U, 3, 2)
dependentField.ComponentMeshComponentSet(iron.FieldVariableTypes.DELUDELN,
1, 1)
dependentField.ComponentMeshComponentSet(iron.FieldVariableTypes.DELUDELN,
2, 1)
dependentField.ComponentMeshComponentSet(iron.FieldVariableTypes.DELUDELN,
3, 2)
dependentField.DOFOrderTypeSet(iron.FieldVariableTypes.U,
iron.FieldDOFOrderTypes.SEPARATED)
dependentField.DOFOrderTypeSet(iron.FieldVariableTypes.DELUDELN,
iron.FieldDOFOrderTypes.SEPARATED)
equationsSet.DependentCreateFinish()
# Initialise dependent field
dependentField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES, 1, 0.0)
# Create materials field
materialsField = iron.Field()
equationsSet.MaterialsCreateStart(materialsFieldUserNumber, materialsField)
equationsSet.MaterialsCreateFinish()
# Initialise materials field parameters
materialsField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES, 1,
viscosity)
materialsField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES, 2,
density)
# If specified, use a sinusoidal waveform to ramp up lid velocity from 0 to 1
if analytic:
# yOffset + amplitude*sin(frequency*time + phaseShift))))
# Set the time it takes to ramp velocity up to full lid velocity
rampPeriod = 10.0
frequency = math.pi / (rampPeriod)
amplitude = 0.5 * lidVelocity[0]
yOffset = 0.5 * lidVelocity[0]
phaseShift = -math.pi / 2.0
startSine = 0.0
stopSine = rampPeriod
analyticField = iron.Field()
equationsSet.AnalyticCreateStart(
iron.NavierStokesAnalyticFunctionTypes.SINUSOID,
analyticFieldUserNumber, analyticField)
equationsSet.AnalyticCreateFinish()
analyticParameters = [
1.0, 0.0, 0.0, 0.0, amplitude, yOffset, frequency, phaseShift,
startSine, stopSine
]
# Create equations
equations = iron.Equations()
equationsSet.EquationsCreateStart(equations)
equations.sparsityType = iron.EquationsSparsityTypes.SPARSE
equations.outputType = iron.EquationsOutputTypes.NONE
equationsSet.EquationsCreateFinish()
# Create Navier-Stokes problem
problem = iron.Problem()
if RBS:
problemSpecification = [
iron.ProblemClasses.FLUID_MECHANICS,
iron.ProblemTypes.NAVIER_STOKES_EQUATION,
iron.ProblemSubtypes.TRANSIENT_RBS_NAVIER_STOKES
]
else:
problemSpecification = [
iron.ProblemClasses.FLUID_MECHANICS,
iron.ProblemTypes.NAVIER_STOKES_EQUATION,
iron.ProblemSubtypes.TRANSIENT_NAVIER_STOKES
]
problem.CreateStart(problemUserNumber, problemSpecification)
problem.CreateFinish()
# Create control loops
problem.ControlLoopCreateStart()
controlLoop = iron.ControlLoop()
problem.ControlLoopGet([iron.ControlLoopIdentifiers.NODE], controlLoop)
controlLoop.TimesSet(transient[0], transient[1], transient[2])
controlLoop.TimeOutputSet(transient[3])
problem.ControlLoopCreateFinish()
# Create problem solver
dynamicSolver = iron.Solver()
problem.SolversCreateStart()
problem.SolverGet([iron.ControlLoopIdentifiers.NODE], 1, dynamicSolver)
dynamicSolver.outputType = iron.SolverOutputTypes.NONE
dynamicSolver.dynamicTheta = [0.5]
nonlinearSolver = iron.Solver()
dynamicSolver.DynamicNonlinearSolverGet(nonlinearSolver)
if fdJacobian:
nonlinearSolver.newtonJacobianCalculationType = iron.JacobianCalculationTypes.FD
else:
nonlinearSolver.newtonJacobianCalculationType = iron.JacobianCalculationTypes.EQUATIONS
nonlinearSolver.outputType = iron.SolverOutputTypes.NONE
nonlinearSolver.newtonAbsoluteTolerance = 1.0E-8
nonlinearSolver.newtonRelativeTolerance = 1.0E-9
nonlinearSolver.newtonSolutionTolerance = 1.0E-9
nonlinearSolver.newtonMaximumFunctionEvaluations = 10000
nonlinearSolver.newtonLineSearchType = iron.NewtonLineSearchTypes.QUADRATIC
linearSolver = iron.Solver()
nonlinearSolver.NewtonLinearSolverGet(linearSolver)
linearSolver.outputType = iron.SolverOutputTypes.NONE
linearSolver.linearType = iron.LinearSolverTypes.DIRECT
linearSolver.libraryType = iron.SolverLibraries.MUMPS
problem.SolversCreateFinish()
# Create solver equations and add equations set to solver equations
solver = iron.Solver()
solverEquations = iron.SolverEquations()
problem.SolverEquationsCreateStart()
problem.SolverGet([iron.ControlLoopIdentifiers.NODE], 1, solver)
solver.SolverEquationsGet(solverEquations)
solverEquations.sparsityType = iron.SolverEquationsSparsityTypes.SPARSE
equationsSetIndex = solverEquations.EquationsSetAdd(equationsSet)
problem.SolverEquationsCreateFinish()
# Create boundary conditions
boundaryConditions = iron.BoundaryConditions()
solverEquations.BoundaryConditionsCreateStart(boundaryConditions)
nodes = iron.Nodes()
region.NodesGet(nodes)
print("Total # of nodes: " + str(nodes.numberOfNodes))
print("Analytic Parameters: " + str(analyticParameters))
boundaryTolerance = 1.0e-6
# Currently issues with getting generated mesh surfaces through python so easier to just loop over all nodes
for node in range(nodes.numberOfNodes):
nodeId = node + 1
nodeNumber = nodes.UserNumberGet(nodeId)
# print('node number: '+ str(nodeNumber))
# Velocity nodes
nodeDomain = decomposition.NodeDomainGet(nodeNumber, 1)
if (nodeDomain == computationalNodeNumber):
xLocation = geometricField.ParameterSetGetNodeDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES,
1, 1, nodeNumber, 1)
yLocation = geometricField.ParameterSetGetNodeDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES,
1, 1, nodeNumber, 2)
# rigid wall (left,right,bottom) conditions: v=0
if (xLocation < boundaryTolerance
or cavityDimensions[0] - xLocation < boundaryTolerance
or yLocation < boundaryTolerance):
boundaryConditions.SetNode(dependentField,
iron.FieldVariableTypes.U, 1, 1,
nodeNumber, 1,
iron.BoundaryConditionsTypes.FIXED,
0.0)
boundaryConditions.SetNode(dependentField,
iron.FieldVariableTypes.U, 1, 1,
nodeNumber, 2,
iron.BoundaryConditionsTypes.FIXED,
0.0)
# lid (top) conditions: v=v
elif (cavityDimensions[1] - yLocation < boundaryTolerance):
if not (xLocation < boundaryTolerance or
cavityDimensions[0] - xLocation < boundaryTolerance):
if analytic:
boundaryConditions.SetNode(
dependentField, iron.FieldVariableTypes.U, 1, 1,
nodeNumber, 1,
iron.BoundaryConditionsTypes.FIXED_INLET, 0.0)
boundaryConditions.SetNode(
dependentField, iron.FieldVariableTypes.U, 1, 1,
nodeNumber, 2,
iron.BoundaryConditionsTypes.FIXED_INLET, 0.0)
# Set analytic parameters
parameterNumber = 0
for parameter in analyticParameters:
parameterNumber += 1
analyticField.ParameterSetUpdateNodeDP(
iron.FieldVariableTypes.U,
iron.FieldParameterSetTypes.VALUES, 1, 1,
nodeNumber, parameterNumber, parameter)
else:
boundaryConditions.SetNode(
dependentField, iron.FieldVariableTypes.U, 1, 1,
nodeNumber, 1, iron.BoundaryConditionsTypes.FIXED,
lidVelocity[0])
boundaryConditions.SetNode(
dependentField, iron.FieldVariableTypes.U, 1, 1,
nodeNumber, 2, iron.BoundaryConditionsTypes.FIXED,
lidVelocity[1])
# Pressure node
nodeNumber = 1
nodeDomain = decomposition.NodeDomainGet(nodeNumber, 2)
if (nodeDomain == computationalNodeNumber):
# bottom left node - reference pressure: p=0
boundaryConditions.SetNode(dependentField, iron.FieldVariableTypes.U,
1, 1, nodeNumber, 3,
iron.BoundaryConditionsTypes.FIXED, 0.0)
print('pressure node: ' + str(nodeNumber))
solverEquations.BoundaryConditionsCreateFinish()
# Solve the problem
print("solving...")
problem.Solve()
print("exporting CMGUI data")
# Export results
fields = iron.Fields()
fields.CreateRegion(region)
fields.NodesExport(outputFilename, "FORTRAN")
fields.ElementsExport(outputFilename, "FORTRAN")
fields.Finalise()
# Clear fields so can run in batch mode on this region
generatedMesh.Destroy()
nodes.Destroy()
mesh.Destroy()
geometricField.Destroy()
if RBS:
equationsSetField.Destroy()
if analytic:
analyticField.Destroy()
dependentField.Destroy()
materialsField.Destroy()
equationsSet.Destroy()
problem.Destroy()
problem = iron.Problem()
problemSpecification = [iron.ProblemClasses.ELASTICITY,
iron.ProblemTypes.FINITE_ELASTICITY,
iron.ProblemSubtypes.FINITE_ELASTICITY_WITH_GROWTH_CELLML]
problem.CreateStart(problemUserNumber,problemSpecification)
problem.CreateFinish()
# Create control loops
timeLoop = iron.ControlLoop()
problem.ControlLoopCreateStart()
problem.ControlLoopGet([iron.ControlLoopIdentifiers.NODE],timeLoop)
timeLoop.TimesSet(startTime,stopTime,timeIncrement)
problem.ControlLoopCreateFinish()
# Create problem solvers
odeIntegrationSolver = iron.Solver()
nonlinearSolver = iron.Solver()
linearSolver = iron.Solver()
cellMLEvaluationSolver = iron.Solver()
problem.SolversCreateStart()
problem.SolverGet([iron.ControlLoopIdentifiers.NODE],1,odeIntegrationSolver)
problem.SolverGet([iron.ControlLoopIdentifiers.NODE],2,nonlinearSolver)
nonlinearSolver.outputType = iron.SolverOutputTypes.PROGRESS
nonlinearSolver.NewtonJacobianCalculationTypeSet(iron.JacobianCalculationTypes.FD)
nonlinearSolver.NewtonCellMLSolverGet(cellMLEvaluationSolver)
nonlinearSolver.NewtonLinearSolverGet(linearSolver)
linearSolver.linearType = iron.LinearSolverTypes.DIRECT
problem.SolversCreateFinish()
# Create nonlinear equations and add equations set to solver equations
nonlinearEquations = iron.SolverEquations()
problem.CreateFinish() # Create the problem control loops # For static finite elasticity, there is just a # single load increment control loop, and we set # the number of load increments by setting the number of # iterations of this control loop problem.ControlLoopCreateStart() controlLoop = iron.ControlLoop() problem.ControlLoopGet([iron.ControlLoopIdentifiers.NODE], controlLoop) controlLoop.MaximumIterationsSet(numIncrements) controlLoop.OutputTypeSet(iron.ControlLoopOutputTypes.PROGRESS) problem.ControlLoopCreateFinish() # Create the problem solver solver = iron.Solver() problem.SolversCreateStart() problem.SolverGet([iron.ControlLoopIdentifiers.NODE], 1, solver) solver.OutputTypeSet(iron.SolverOutputTypes.PROGRESS) solver.NewtonJacobianCalculationTypeSet(iron.JacobianCalculationTypes.EQUATIONS) solver.NewtonRelativeToleranceSet(1.0e-8) solver.NewtonAbsoluteToleranceSet(1.0e-8) solver.NewtonSolutionToleranceSet(1.0e-8) # Adjust settings for the line search solver linesearchSolver = iron.Solver() solver.NewtonLinearSolverGet(linesearchSolver) linesearchSolver.LinearTypeSet(iron.LinearSolverTypes.DIRECT) problem.SolversCreateFinish() # Create solver equations for the problem and add # the single equations set to solver equations.
problem.CreateFinish()
# Create control loops and set the time parameters
timeLoop = iron.ControlLoop()
problem.ControlLoopCreateStart()
problem.ControlLoopGet([iron.ControlLoopIdentifiers.NODE], timeLoop)
timeLoop.TimesSet(startTime, stopTime, timeIncrement)
# Disable time output as fluid_mechanics_IO_routines crashes
timeLoop.TimeOutputSet(0)
problem.ControlLoopCreateFinish()
# Create problem solvers
problem.SolversCreateStart()
# Set dynamic solver properties
dynamicSolver = iron.Solver()
dynamicSolverIndex = 1
problem.SolverGet(
[iron.ControlLoopIdentifiers.NODE], dynamicSolverIndex, dynamicSolver)
dynamicSolver.outputType = iron.SolverOutputTypes.PROGRESS
dynamicSolver.dynamicTheta = [solverTheta]
# Set nonlinear solver properties
nonlinearSolver = iron.Solver()
dynamicSolver.DynamicNonlinearSolverGet(nonlinearSolver)
nonlinearSolver.newtonJacobianCalculationType = (
iron.JacobianCalculationTypes.EQUATIONS)
nonlinearSolver.outputType = iron.SolverOutputTypes.NONE
nonlinearSolver.newtonAbsoluteTolerance = 1.0e-10
nonlinearSolver.newtonRelativeTolerance = 1.0e-10
def solveProblem(transient, viscosity, density, offset, amplitude, period):
""" Sets up the problem and solve with the provided parameter values
Oscillatory flow through a rigid cylinder
u=0
------------------------------------------- R = 0.5
>
->
p = offset + A*sin(2*pi*(t/period)) --> u(r,t) p = 0
->
>
------------------------------------------- L = 10
u=0
"""
startTime = time.time()
angularFrequency = 2.0 * math.pi / period
womersley = radius * math.sqrt(angularFrequency * density / viscosity)
if computationalNodeNumber == 0:
print("-----------------------------------------------")
print("Setting up problem for Womersley number: " + str(womersley))
print("-----------------------------------------------")
# Create standard Navier-Stokes equations set
equationsSetField = iron.Field()
equationsSet = iron.EquationsSet()
equationsSetSpecification = [
iron.EquationsSetClasses.FLUID_MECHANICS,
iron.EquationsSetTypes.NAVIER_STOKES_EQUATION,
iron.EquationsSetSubtypes.TRANSIENT_SUPG_NAVIER_STOKES
]
equationsSet.CreateStart(equationsSetUserNumber, region, geometricField,
equationsSetSpecification,
equationsSetFieldUserNumber, equationsSetField)
equationsSet.CreateFinish()
# Set boundary retrograde flow stabilisation scaling factor (default 0.2)
equationsSetField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.V, iron.FieldParameterSetTypes.VALUES, 1, 0.2)
# Create dependent field
dependentField = iron.Field()
equationsSet.DependentCreateStart(dependentFieldUserNumber, dependentField)
# velocity
for component in range(1, 4):
dependentField.ComponentMeshComponentSet(iron.FieldVariableTypes.U,
component,
meshComponentQuadratic)
dependentField.ComponentMeshComponentSet(
iron.FieldVariableTypes.DELUDELN, component,
meshComponentQuadratic)
# pressure
dependentField.ComponentMeshComponentSet(iron.FieldVariableTypes.U, 4,
meshComponentLinear)
dependentField.ComponentMeshComponentSet(iron.FieldVariableTypes.DELUDELN,
4, meshComponentLinear)
dependentField.DOFOrderTypeSet(iron.FieldVariableTypes.U,
iron.FieldDOFOrderTypes.SEPARATED)
dependentField.DOFOrderTypeSet(iron.FieldVariableTypes.DELUDELN,
iron.FieldDOFOrderTypes.SEPARATED)
equationsSet.DependentCreateFinish()
# Initialise dependent field to 0
for component in range(1, 5):
dependentField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES,
component, 0.0)
dependentField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.DELUDELN,
iron.FieldParameterSetTypes.VALUES, component, 0.0)
# Initialise dependent field to analytic values
initialiseAnalytic = True
if initialiseAnalytic:
for node in range(1, numberOfNodes + 1):
sumPositionSq = 0.
nodeNumber = nodes.UserNumberGet(node)
nodeDomain = decomposition.NodeDomainGet(nodeNumber,
meshComponentQuadratic)
if (nodeDomain == computationalNodeNumber):
for component in range(1, 4):
if component != axialComponent + 1:
value = geometricField.ParameterSetGetNodeDP(
iron.FieldVariableTypes.U,
iron.FieldParameterSetTypes.VALUES, 1,
iron.GlobalDerivativeConstants.NO_GLOBAL_DERIV,
nodeNumber, component)
sumPositionSq += value**2
radialNodePosition = math.sqrt(sumPositionSq)
for component in range(1, 4):
if component == axialComponent + 1:
value = womersleyAnalytic.womersleyAxialVelocity(
transient[0], offset, amplitude, radius,
radialNodePosition, period, viscosity, womersley,
length)
else:
value = 0.0
dependentField.ParameterSetUpdateNodeDP(
iron.FieldVariableTypes.U,
iron.FieldParameterSetTypes.VALUES, 1, 1, nodeNumber,
component, value)
# Create materials field
materialsField = iron.Field()
equationsSet.MaterialsCreateStart(materialsFieldUserNumber, materialsField)
equationsSet.MaterialsCreateFinish()
# Initialise materials field parameters
materialsField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES, 1,
viscosity)
materialsField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES, 2,
density)
# Create analytic field (allows for time-dependent calculation of sinusoidal pressure waveform during solve)
analytic = True
if analytic:
analyticField = iron.Field()
equationsSet.AnalyticCreateStart(
iron.NavierStokesAnalyticFunctionTypes.FlowrateSinusoid,
analyticFieldUserNumber, analyticField)
equationsSet.AnalyticCreateFinish()
# Initialise analytic field parameters: (1-4) Dependent params, 5 amplitude, 6 offset, 7 period
analyticField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES, 1,
0.0)
analyticField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES, 2,
0.0)
analyticField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES, 3,
0.0)
analyticField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES, 4,
1.0)
analyticField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES, 5,
amplitude)
analyticField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES, 6,
offset)
analyticField.ComponentValuesInitialiseDP(
iron.FieldVariableTypes.U, iron.FieldParameterSetTypes.VALUES, 7,
period)
# Create equations
equations = iron.Equations()
equationsSet.EquationsCreateStart(equations)
equations.sparsityType = iron.EquationsSparsityTypes.SPARSE
equations.outputType = iron.EquationsOutputTypes.NONE
equationsSet.EquationsCreateFinish()
# Create Navier-Stokes problem
problem = iron.Problem()
problemSpecification = [
iron.ProblemClasses.FLUID_MECHANICS,
iron.ProblemTypes.NAVIER_STOKES_EQUATION,
iron.ProblemSubTypes.TRANSIENT_SUPG_NAVIER_STOKES
]
problem.CreateStart(problemUserNumber, problemSpecification)
problem.CreateFinish()
# Create control loops
problem.ControlLoopCreateStart()
controlLoop = iron.ControlLoop()
problem.ControlLoopGet([iron.ControlLoopIdentifiers.NODE], controlLoop)
controlLoop.TimesSet(transient[0], transient[1], transient[2])
controlLoop.TimeOutputSet(transient[3])
problem.ControlLoopCreateFinish()
# Create problem solver
dynamicSolver = iron.Solver()
problem.SolversCreateStart()
problem.SolverGet([iron.ControlLoopIdentifiers.NODE], 1, dynamicSolver)
dynamicSolver.outputType = iron.SolverOutputTypes.NONE
dynamicSolver.dynamicTheta = [1.0]
nonlinearSolver = iron.Solver()
dynamicSolver.DynamicNonlinearSolverGet(nonlinearSolver)
nonlinearSolver.newtonJacobianCalculationType = iron.JacobianCalculationTypes.EQUATIONS
nonlinearSolver.outputType = iron.SolverOutputTypes.PROGRESS
nonlinearSolver.newtonAbsoluteTolerance = 1.0E-7
nonlinearSolver.newtonRelativeTolerance = 1.0E-7
nonlinearSolver.newtonSolutionTolerance = 1.0E-7
nonlinearSolver.newtonMaximumFunctionEvaluations = 10000
linearSolver = iron.Solver()
nonlinearSolver.NewtonLinearSolverGet(linearSolver)
linearSolver.outputType = iron.SolverOutputTypes.NONE
linearSolver.linearType = iron.LinearSolverTypes.DIRECT
linearSolver.libraryType = iron.SolverLibraries.MUMPS
problem.SolversCreateFinish()
# Create solver equations and add equations set to solver equations
solver = iron.Solver()
solverEquations = iron.SolverEquations()
problem.SolverEquationsCreateStart()
problem.SolverGet([iron.ControlLoopIdentifiers.NODE], 1, solver)
solver.SolverEquationsGet(solverEquations)
solverEquations.sparsityType = iron.SolverEquationsSparsityTypes.SPARSE
equationsSetIndex = solverEquations.EquationsSetAdd(equationsSet)
problem.SolverEquationsCreateFinish()
# Create boundary conditions
boundaryConditions = iron.BoundaryConditions()
solverEquations.BoundaryConditionsCreateStart(boundaryConditions)
# Wall boundary nodes u = 0 (no-slip)
value = 0.0
for nodeNumber in wallNodes:
nodeDomain = decomposition.NodeDomainGet(nodeNumber,
meshComponentQuadratic)
if (nodeDomain == computationalNodeNumber):
for component in range(numberOfDimensions):
componentId = component + 1
boundaryConditions.SetNode(
dependentField, iron.FieldVariableTypes.U, 1,
iron.GlobalDerivativeConstants.NO_GLOBAL_DERIV, nodeNumber,
componentId, iron.BoundaryConditionsTypes.FIXED, value)
# Note: inlet/outlet nodes are pressure-based so only defined on linear nodes
# outlet boundary nodes p = 0
value = 0.0
for nodeNumber in outletNodes:
nodeDomain = decomposition.NodeDomainGet(nodeNumber,
meshComponentLinear)
if (nodeDomain == computationalNodeNumber):
boundaryConditions.SetNode(
dependentField, iron.FieldVariableTypes.U, 1,
iron.GlobalDerivativeConstants.NO_GLOBAL_DERIV, nodeNumber, 4,
iron.BoundaryConditionsTypes.FIXED_OUTLET, value)
# inlet boundary nodes p = f(t) - will be updated in pre-solve
value = 0.0
for nodeNumber in inletNodes:
nodeDomain = decomposition.NodeDomainGet(nodeNumber,
meshComponentQuadratic)
if (nodeDomain == computationalNodeNumber):
boundaryConditions.SetNode(
dependentField, iron.FieldVariableTypes.U, 1,
iron.GlobalDerivativeConstants.NO_GLOBAL_DERIV, nodeNumber, 4,
iron.BoundaryConditionsTypes.FIXED_INLET, value)
solverEquations.BoundaryConditionsCreateFinish()
# Solve the problem
print("solving problem...")
problem.Solve()
print("Finished. Time to solve (seconds): " + str(time.time() - startTime))
# Clear fields so can run in batch mode on this region
materialsField.Destroy()
dependentField.Destroy()
analyticField.Destroy()
equationsSet.Destroy()
problem.Destroy()
