def Initialize(self):
self.computing_model_part = self.GetComputingModelPart()
# If needed, create the estimate time step utility
if (self.settings["time_stepping"]["automatic_time_step"].GetBool()):
self.EstimateDeltaTimeUtility = self._GetAutomaticTimeSteppingUtility(
)
# Creating the solution strategy
self.conv_criteria = KratosCFD.VelPrCriteria(
self.settings["relative_velocity_tolerance"].GetDouble(),
self.settings["absolute_velocity_tolerance"].GetDouble(),
self.settings["relative_pressure_tolerance"].GetDouble(),
self.settings["absolute_pressure_tolerance"].GetDouble())
(self.conv_criteria).SetEchoLevel(self.settings["echo_level"].GetInt())
if (self.settings["turbulence_model"].GetString() == "None"):
if self.settings["consider_periodic_conditions"].GetBool() == True:
self.time_scheme = KratosCFD.ResidualBasedPredictorCorrectorVelocityBossakSchemeTurbulent(
self.settings["alpha"].GetDouble(),
self.settings["move_mesh_strategy"].GetInt(),
self.computing_model_part.ProcessInfo[
KratosMultiphysics.DOMAIN_SIZE], KratosCFD.PATCH_INDEX)
else:
self.time_scheme = KratosCFD.ResidualBasedPredictorCorrectorVelocityBossakSchemeTurbulent(
self.settings["alpha"].GetDouble(),
self.settings["move_mesh_strategy"].GetInt(),
self.computing_model_part.ProcessInfo[
KratosMultiphysics.DOMAIN_SIZE])
else:
raise Exception("Turbulence models are not added yet.")
if self.settings["consider_periodic_conditions"].GetBool() == True:
builder_and_solver = KratosCFD.ResidualBasedBlockBuilderAndSolverPeriodic(
self.linear_solver, KratosCFD.PATCH_INDEX)
else:
builder_and_solver = KratosMultiphysics.ResidualBasedBlockBuilderAndSolver(
self.linear_solver)
self.solver = KratosMultiphysics.ResidualBasedNewtonRaphsonStrategy(
self.main_model_part, self.time_scheme, self.linear_solver,
self.conv_criteria, builder_and_solver,
self.settings["maximum_iterations"].GetInt(),
self.settings["compute_reactions"].GetBool(),
self.settings["reform_dofs_at_each_step"].GetBool(),
self.settings["move_mesh_flag"].GetBool())
(self.solver).SetEchoLevel(self.settings["echo_level"].GetInt())
(self.solver).Check()
self.main_model_part.ProcessInfo.SetValue(
KratosMultiphysics.DYNAMIC_TAU,
self.settings["dynamic_tau"].GetDouble())
self.main_model_part.ProcessInfo.SetValue(
KratosMultiphysics.OSS_SWITCH,
self.settings["oss_switch"].GetInt())
print("Monolithic solver initialization finished.")
def Initialize(self):
self.computing_model_part = self.GetComputingModelPart()
MoveMeshFlag = False
# TODO: TURBULENCE MODELS ARE NOT ADDED YET
#~ # Turbulence model
#~ if self.use_spalart_allmaras:
#~ self.activate_spalart_allmaras()
# creating the solution strategy
self.conv_criteria = KratosCFD.VelPrCriteria(
self.settings["relative_velocity_tolerance"].GetDouble(),
self.settings["absolute_velocity_tolerance"].GetDouble(),
self.settings["relative_pressure_tolerance"].GetDouble(),
self.settings["absolute_pressure_tolerance"].GetDouble())
(self.conv_criteria).SetEchoLevel(self.settings["echo_level"].GetInt())
self.time_scheme = KratosCFD.ResidualBasedSimpleSteadyScheme(
self.velocity_relaxation_factor, self.pressure_relaxation_factor,
self.computing_model_part.ProcessInfo[
KratosMultiphysics.DOMAIN_SIZE])
# TODO: TURBULENCE MODELS ARE NOT ADDED YET
#~ if self.turbulence_model is None:
#~ if self.periodic == True:
#~ self.time_scheme = ResidualBasedPredictorCorrectorVelocityBossakSchemeTurbulent\
#~ (self.alpha, self.move_mesh_strategy, self.domain_size, PATCH_INDEX)
#~ else:
#~ self.time_scheme = ResidualBasedPredictorCorrectorVelocityBossakSchemeTurbulent\
#~ (self.alpha, self.move_mesh_strategy, self.domain_size)
#~ else:
#~ self.time_scheme = ResidualBasedPredictorCorrectorVelocityBossakSchemeTurbulent\
#~ (self.alpha, self.move_mesh_strategy, self.domain_size, self.turbulence_model)
builder_and_solver = KratosMultiphysics.ResidualBasedBlockBuilderAndSolver(
self.linear_solver)
self.solver = KratosMultiphysics.ResidualBasedNewtonRaphsonStrategy(
self.main_model_part, self.time_scheme, self.linear_solver,
self.conv_criteria, builder_and_solver,
self.settings["maximum_iterations"].GetInt(),
self.settings["compute_reactions"].GetBool(),
self.settings["reform_dofs_at_each_step"].GetBool(),
self.settings["move_mesh_flag"].GetBool())
(self.solver).SetEchoLevel(self.settings["echo_level"].GetInt())
if self.settings["stabilization"].Has("dynamic_tau"):
self.main_model_part.ProcessInfo.SetValue(
KratosMultiphysics.DYNAMIC_TAU,
self.settings["stabilization"]["dynamic_tau"].GetDouble())
if self.settings["stabilization"].Has("oss_switch"):
self.main_model_part.ProcessInfo.SetValue(
KratosMultiphysics.OSS_SWITCH,
self.settings["stabilization"]["oss_switch"].GetInt())
print("Monolithic solver initialization finished.")
def Initialize(self):
self.computing_model_part = self.GetComputingModelPart()
## Construct the linear solver
self.linear_solver = linear_solver_factory.ConstructSolver(self.settings["linear_solver_settings"])
KratosMultiphysics.NormalCalculationUtils().CalculateOnSimplex(self.computing_model_part, self.computing_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE])
self.neighbour_search = KratosMultiphysics.FindNodalNeighboursProcess(self.computing_model_part, 10, 10)
(self.neighbour_search).Execute()
self.accelerationLimitationUtility = KratosCFD.AccelerationLimitationUtilities( self.computing_model_part, 5.0 )
# If needed, create the estimate time step utility
if (self.settings["time_stepping"]["automatic_time_step"].GetBool()):
self.EstimateDeltaTimeUtility = self._GetAutomaticTimeSteppingUtility()
# Set the time discretization utility to compute the BDF coefficients
time_order = self.settings["time_order"].GetInt()
if time_order == 2:
self.time_discretization = KratosMultiphysics.TimeDiscretization.BDF(time_order)
else:
raise Exception("Only \"time_order\" equal to 2 is supported. Provided \"time_order\": " + str(time_order))
# Creating the solution strategy
self.conv_criteria = KratosCFD.VelPrCriteria(self.settings["relative_velocity_tolerance"].GetDouble(),
self.settings["absolute_velocity_tolerance"].GetDouble(),
self.settings["relative_pressure_tolerance"].GetDouble(),
self.settings["absolute_pressure_tolerance"].GetDouble())
(self.conv_criteria).SetEchoLevel(self.settings["echo_level"].GetInt())
self.level_set_convection_process = self._set_level_set_convection_process()
self.variational_distance_process = self._set_variational_distance_process()
time_scheme = KratosMultiphysics.ResidualBasedIncrementalUpdateStaticSchemeSlip(self.main_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE], # Domain size (2,3)
self.main_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE]+1) # DOFs (3,4)
builder_and_solver = KratosMultiphysics.ResidualBasedBlockBuilderAndSolver(self.linear_solver)
self.solver = KratosMultiphysics.ResidualBasedNewtonRaphsonStrategy(self.computing_model_part,
time_scheme,
self.linear_solver,
self.conv_criteria,
builder_and_solver,
self.settings["maximum_iterations"].GetInt(),
self.settings["compute_reactions"].GetBool(),
self.settings["reform_dofs_at_each_step"].GetBool(),
self.settings["move_mesh_flag"].GetBool())
(self.solver).SetEchoLevel(self.settings["echo_level"].GetInt())
(self.solver).Initialize() # Initialize the solver. Otherwise the constitutive law is not initializated.
(self.solver).Check()
self.main_model_part.ProcessInfo.SetValue(KratosMultiphysics.DYNAMIC_TAU, self.settings["formulation"]["dynamic_tau"].GetDouble())
KratosMultiphysics.Logger.PrintInfo("NavierStokesTwoFluidsSolver", "Solver initialization finished.")
def _GetAutomaticTimeSteppingUtility(self):
if (self.GetComputingModelPart().ProcessInfo[Kratos.DOMAIN_SIZE] == 2):
EstimateDeltaTimeUtility = KratosCFD.EstimateDtUtility2D(
self.GetComputingModelPart(), self.settings["time_stepping"])
else:
EstimateDeltaTimeUtility = KratosCFD.EstimateDtUtility3D(
self.GetComputingModelPart(), self.settings["time_stepping"])
return EstimateDeltaTimeUtility
def _CreateSolutionStrategy(self):
computing_model_part = self.GetComputingModelPart()
domain_size = computing_model_part.ProcessInfo[
KratosMultiphysics.DOMAIN_SIZE]
# Create the pressure and velocity linear solvers
# Note that linear_solvers is a tuple. The first item is the pressure
# linear solver. The second item is the velocity linear solver.
linear_solvers = self._GetLinearSolver()
# Create the fractional step settings instance
# TODO: next part would be much cleaner if we passed directly the parameters to the c++
if self.settings["consider_periodic_conditions"].GetBool():
fractional_step_settings = KratosCFD.FractionalStepSettingsPeriodic(
computing_model_part, domain_size,
self.settings["time_order"].GetInt(),
self.settings["use_slip_conditions"].GetBool(),
self.settings["move_mesh_flag"].GetBool(),
self.settings["reform_dofs_at_each_step"].GetBool(),
KratosCFD.PATCH_INDEX)
else:
fractional_step_settings = KratosCFD.FractionalStepSettings(
computing_model_part, domain_size,
self.settings["time_order"].GetInt(),
self.settings["use_slip_conditions"].GetBool(),
self.settings["move_mesh_flag"].GetBool(),
self.settings["reform_dofs_at_each_step"].GetBool())
# Set the strategy echo level
fractional_step_settings.SetEchoLevel(
self.settings["echo_level"].GetInt())
# Set the velocity and pressure fractional step strategy settings
fractional_step_settings.SetStrategy(
KratosCFD.StrategyLabel.Pressure, linear_solvers[0],
self.settings["pressure_tolerance"].GetDouble(),
self.settings["maximum_pressure_iterations"].GetInt())
fractional_step_settings.SetStrategy(
KratosCFD.StrategyLabel.Velocity, linear_solvers[1],
self.settings["velocity_tolerance"].GetDouble(),
self.settings["maximum_velocity_iterations"].GetInt())
# Create the fractional step strategy
if self.settings["consider_periodic_conditions"].GetBool() == True:
solution_strategy = KratosCFD.FractionalStepStrategy(
computing_model_part, fractional_step_settings,
self.settings["predictor_corrector"].GetBool(),
self.settings["compute_reactions"].GetBool(),
KratosCFD.PATCH_INDEX)
else:
solution_strategy = KratosCFD.FractionalStepStrategy(
computing_model_part, fractional_step_settings,
self.settings["predictor_corrector"].GetBool(),
self.settings["compute_reactions"].GetBool())
return solution_strategy
def _GetAutomaticTimeSteppingUtility(self):
if (self.computing_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE] == 2):
EstimateDeltaTimeUtility = KratosCFD.EstimateDtUtility2D(self.computing_model_part,
self.settings["time_stepping"])
else:
EstimateDeltaTimeUtility = KratosCFD.EstimateDtUtility3D(self.computing_model_part,
self.settings["time_stepping"])
return EstimateDeltaTimeUtility
def Initialize(self):
## Construct the communicator
self.EpetraCommunicator = TrilinosApplication.CreateCommunicator()
## Get the computing model part
self.computing_model_part = self.GetComputingModelPart()
domain_size = self.main_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE]
if self.settings["response_function_settings"]["response_type"].GetString() == "drag":
if (domain_size == 2):
self.response_function = FluidDynamicsApplication.DragResponseFunction2D(self.settings["response_function_settings"]["custom_settings"], self.main_model_part)
elif (domain_size == 3):
self.response_function = FluidDynamicsApplication.DragResponseFunction3D(self.settings["response_function_settings"]["custom_settings"], self.main_model_part)
else:
raise Exception("Invalid DOMAIN_SIZE: " + str(domain_size))
else:
raise Exception("invalid response_type: " + self.settings["response_function_settings"]["response_type"].GetString())
self.sensitivity_builder = KratosMultiphysics.SensitivityBuilder(self.settings["sensitivity_settings"], self.main_model_part, self.response_function)
if self.settings["scheme_settings"]["scheme_type"].GetString() == "bossak":
self.time_scheme = TrilinosApplication.TrilinosResidualBasedAdjointBossakScheme(self.settings["scheme_settings"], self.response_function)
elif self.settings["scheme_settings"]["scheme_type"].GetString() == "steady":
self.time_scheme = TrilinosApplication.TrilinosResidualBasedAdjointSteadyScheme(self.response_function)
else:
raise Exception("invalid scheme_type: " + self.settings["scheme_settings"]["scheme_type"].GetString())
if self.main_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE] == 3:
guess_row_size = 20*4
elif self.main_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE] == 2:
guess_row_size = 10*3
self.builder_and_solver = TrilinosApplication.TrilinosBlockBuilderAndSolver(self.EpetraCommunicator,
guess_row_size,
self.trilinos_linear_solver)
self.solver = TrilinosApplication.TrilinosLinearStrategy(self.main_model_part,
self.time_scheme,
self.trilinos_linear_solver,
self.builder_and_solver,
False,
False,
False,
False)
(self.solver).SetEchoLevel(self.settings["echo_level"].GetInt())
(self.solver).Initialize()
(self.response_function).Initialize()
(self.sensitivity_builder).Initialize()
self.main_model_part.ProcessInfo.SetValue(KratosMultiphysics.DYNAMIC_TAU, self.settings["dynamic_tau"].GetDouble())
self.main_model_part.ProcessInfo.SetValue(KratosMultiphysics.OSS_SWITCH, self.settings["oss_switch"].GetInt())
if self._IsPrintingRank():
KratosMultiphysics.Logger.PrintInfo(self.__class__.__name__,"Monolithic MPI solver initialization finished.")
def Initialize(self):
self.computing_model_part = self.GetComputingModelPart()
# If needed, create the estimate time step utility
if (self.settings["time_stepping"]["automatic_time_step"].GetBool()):
self.EstimateDeltaTimeUtility = self._GetAutomaticTimeSteppingUtility()
#TODO: next part would be much cleaner if we passed directly the parameters to the c++
if self.settings["consider_periodic_conditions"] == True:
self.solver_settings = KratosCFD.FractionalStepSettingsPeriodic(self.computing_model_part,
self.computing_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE],
self.settings.GetInt(),
self.settings["use_slip_conditions"].GetBool(),
self.settings["move_mesh_flag"].GetBool(),
self.settings["reform_dofs_at_each_step"].GetBool(),
KratosCFD.PATCH_INDEX)
else:
self.solver_settings = KratosCFD.FractionalStepSettings(self.computing_model_part,
self.computing_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE],
self.settings["time_order"].GetInt(),
self.settings["use_slip_conditions"].GetBool(),
self.settings["move_mesh_flag"].GetBool(),
self.settings["reform_dofs_at_each_step"].GetBool())
self.solver_settings.SetEchoLevel(self.settings["echo_level"].GetInt())
self.solver_settings.SetStrategy(KratosCFD.StrategyLabel.Velocity,
self.velocity_linear_solver,
self.settings["velocity_tolerance"].GetDouble(),
self.settings["maximum_velocity_iterations"].GetInt())
self.solver_settings.SetStrategy(KratosCFD.StrategyLabel.Pressure,
self.pressure_linear_solver,
self.settings["pressure_tolerance"].GetDouble(),
self.settings["maximum_pressure_iterations"].GetInt())
if self.settings["consider_periodic_conditions"].GetBool() == True:
self.solver = KratosCFD.FSStrategy(self.computing_model_part,
self.solver_settings,
self.settings["predictor_corrector"].GetBool(),
KratosCFD.PATCH_INDEX)
else:
self.solver = KratosCFD.FSStrategy(self.computing_model_part,
self.solver_settings,
self.settings["predictor_corrector"].GetBool())
self.main_model_part.ProcessInfo.SetValue(KratosMultiphysics.DYNAMIC_TAU, self.settings["dynamic_tau"].GetDouble())
self.main_model_part.ProcessInfo.SetValue(KratosMultiphysics.OSS_SWITCH, self.settings["oss_switch"].GetInt())
(self.solver).Initialize()
self.solver.Check()
KratosMultiphysics.Logger.PrintInfo("NavierStokesSolverFractionalStep", "Solver initialization finished.")
def _CreateEstimateDtUtility(self):
domain_size = self.GetComputingModelPart().ProcessInfo[
KratosMultiphysics.DOMAIN_SIZE]
if domain_size == 2:
estimate_dt_utility = KratosCFD.EstimateDtUtility2D(
self.GetComputingModelPart(), self.settings["time_stepping"])
else:
estimate_dt_utility = KratosCFD.EstimateDtUtility3D(
self.GetComputingModelPart(), self.settings["time_stepping"])
return estimate_dt_utility
def _set_constitutive_law(self):
# Construct the two fluids constitutive law
if (self.main_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE] ==
3):
self.main_model_part.Properties[1][
KratosMultiphysics.
CONSTITUTIVE_LAW] = KratosCFD.NewtonianTwoFluid3DLaw()
elif (self.main_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE]
== 2):
self.main_model_part.Properties[1][
KratosMultiphysics.
CONSTITUTIVE_LAW] = KratosCFD.NewtonianTwoFluid2DLaw()
def _CreateDistanceSmoothingProcess(self):
# construct the distance smoothing process
linear_solver = self._GetLinearSolver()
if self.main_model_part.ProcessInfo[
KratosMultiphysics.DOMAIN_SIZE] == 2:
distance_smoothing_process = KratosCFD.DistanceSmoothingProcess2D(
self.main_model_part, linear_solver)
else:
distance_smoothing_process = KratosCFD.DistanceSmoothingProcess3D(
self.main_model_part, linear_solver)
return distance_smoothing_process
def _set_constitutive_law(self):
## Construct the constitutive law needed for the embedded element
if (self.main_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE] ==
3):
self.main_model_part.Properties[1][
KratosMultiphysics.
CONSTITUTIVE_LAW] = KratosCFD.Newtonian3DLaw()
elif (self.main_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE]
== 2):
self.main_model_part.Properties[1][
KratosMultiphysics.
CONSTITUTIVE_LAW] = KratosCFD.Newtonian2DLaw()
def _CreateScheme(self):
domain_size = self.GetComputingModelPart().ProcessInfo[
KratosMultiphysics.DOMAIN_SIZE]
# Cases in which the element manages the time integration
if self.element_integrates_in_time:
# Rotation utility for compressible Navier-Stokes formulations
# A custom rotation util is required as the nodal DOFs differs from the standard incompressible case
rotation_utility = KratosFluid.CompressibleElementRotationUtility(
domain_size, KratosMultiphysics.SLIP)
# "Fake" scheme for those cases in where the element manages the time integration
# It is required to perform the nodal update once the current time step is solved
scheme = KratosMultiphysics.ResidualBasedIncrementalUpdateStaticSchemeSlip(
rotation_utility)
# In case the BDF2 scheme is used inside the element, the BDF time discretization utility is required to update the BDF coefficients
if (self.settings["time_scheme"].GetString() == "bdf2"):
time_order = 2
self.time_discretization = KratosMultiphysics.TimeDiscretization.BDF(
time_order)
else:
err_msg = "Requested elemental time scheme \"" + self.settings[
"time_scheme"].GetString() + "\" is not available.\n"
err_msg += "Available options are: \"bdf2\""
raise Exception(err_msg)
# Cases in which a time scheme manages the time integration
else:
err_msg = "Custom scheme creation is not allowed. Compressible Navier-Stokes elements manage the time integration internally."
raise Exception(err_msg)
return scheme
def __CreateDistanceModificationProcess(self):
# Set the distance modification settings according to the level set type
# Note that the distance modification process is applied to the volume model part
distance_modification_settings = self.settings["distance_modification_settings"]
distance_modification_settings.ValidateAndAssignDefaults(self.__GetDistanceModificationDefaultSettings(self.level_set_type))
distance_modification_settings["model_part_name"].SetString(self.settings["volume_model_part_name"].GetString())
return KratosCFD.DistanceModificationProcess(self.model, distance_modification_settings)
def Initialize(self):
computing_model_part = self.GetComputingModelPart()
# If needed, create the estimate time step utility
if (self.settings["time_stepping"]["automatic_time_step"].GetBool()):
self.EstimateDeltaTimeUtility = self._GetAutomaticTimeSteppingUtility()
# Set the time discretization utility to compute the BDF coefficients
time_order = self.settings["time_order"].GetInt()
if time_order == 2:
self.time_discretization = KratosMultiphysics.TimeDiscretization.BDF(time_order)
else:
raise Exception("Only \"time_order\" equal to 2 is supported. Provided \"time_order\": " + str(time_order))
# Creating the solution strategy
self.conv_criteria = KratosCFD.VelPrCriteria(self.settings["relative_velocity_tolerance"].GetDouble(),
self.settings["absolute_velocity_tolerance"].GetDouble(),
self.settings["relative_pressure_tolerance"].GetDouble(),
self.settings["absolute_pressure_tolerance"].GetDouble())
(self.conv_criteria).SetEchoLevel(self.settings["echo_level"].GetInt())
time_scheme = KratosMultiphysics.ResidualBasedIncrementalUpdateStaticSchemeSlip(self.main_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE], # Domain size (2,3)
self.main_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE]+1) # DOFs (3,4)
builder_and_solver = KratosMultiphysics.ResidualBasedBlockBuilderAndSolver(self.linear_solver)
self.solver = KratosMultiphysics.ResidualBasedNewtonRaphsonStrategy(computing_model_part,
time_scheme,
self.linear_solver,
self.conv_criteria,
builder_and_solver,
self.settings["maximum_iterations"].GetInt(),
self.settings["compute_reactions"].GetBool(),
self.settings["reform_dofs_at_each_step"].GetBool(),
self.settings["move_mesh_flag"].GetBool())
(self.solver).SetEchoLevel(self.settings["echo_level"].GetInt())
(self.solver).Initialize() # Initialize the solver. Otherwise the constitutive law is not initializated.
# Set the distance modification process
self.__GetDistanceModificationProcess().ExecuteInitialize()
# For the primitive Ausas formulation, set the find nodal neighbours process
# Recall that the Ausas condition requires the nodal neighbours.
if (self.settings["formulation"]["element_type"].GetString() == "embedded_ausas_navier_stokes"):
number_of_avg_elems = 10
number_of_avg_nodes = 10
self.find_nodal_neighbours_process = KratosMultiphysics.FindNodalNeighboursProcess(self.GetComputingModelPart(),
number_of_avg_elems,
number_of_avg_nodes)
# If required, intialize the FM-ALE utility
if self.__fm_ale_is_active:
self.fm_ale_step = 1
# Fill the virtual model part geometry. Note that the mesh moving util is created in this first call
self._get_mesh_moving_util().Initialize(self.main_model_part)
KratosMultiphysics.Logger.PrintInfo("NavierStokesEmbeddedMonolithicSolver", "Solver initialization finished.")
def __init__(self, Model, settings):
msg = "The python distance modification process is deprecated.\n"
msg += "Please use (or implement) the \'distance_modification_settings\' in the \'solver_settings\'.\n"
KratosMultiphysics.Logger.PrintWarning(
"ApplyDistanceModificationProcess", msg)
KratosMultiphysics.Process.__init__(self)
default_parameters = KratosMultiphysics.Parameters("""
{
"model_part_name" : "CHOOSE_FLUID_MODELPART_NAME",
"distance_threshold" : 0.01,
"continuous_distance" : true,
"check_at_each_time_step" : false,
"avoid_almost_empty_elements" : true,
"deactivate_full_negative_elements" : true,
"recover_original_distance_at_each_step" : false
} """)
settings.ValidateAndAssignDefaults(default_parameters)
self.fluid_model_part = Model[settings["model_part_name"].GetString()]
self.DistanceModificationProcess = KratosFluid.DistanceModificationProcess(
self.fluid_model_part, settings)
def ExecuteFinalizeSolutionStep(self):
current_time = self.model_part.ProcessInfo[KratosMultiphysics.TIME]
if ((current_time >= self.interval[0])
and (current_time < self.interval[1])):
# Compute the drag force
drag_force = KratosFluid.DragUtilities().CalculateBodyFittedDrag(
self.model_part)
# Write the drag force values
if (self.model_part.GetCommunicator().MyPID() == 0):
if (self.print_drag_to_screen):
print("DRAG RESULTS:")
print("Current time: " + str(current_time) + " x-drag: " +
str(drag_force[0]) + " y-drag: " +
str(drag_force[1]) + " z-drag: " +
str(drag_force[2]))
if (self.write_drag_output_file):
with open(self.drag_filename, 'a') as file:
file.write(
str(current_time) + " " + str(drag_force[0]) +
" " + str(drag_force[1]) + " " +
str(drag_force[2]) + "\n")
file.close()
def __init__(self, Model, settings):
KratosMultiphysics.Process.__init__(self)
default_parameters = KratosMultiphysics.Parameters("""
{
"model_part_name" : "default_model_part_name",
"perform_corrections" : true,
"correction_frequency_in_time_steps" : 20,
"write_to_log_file" : true,
"log_file_name" : "mass_conservation.log"
} """)
settings.ValidateAndAssignDefaults(default_parameters)
self._fluid_model_part = Model[settings["model_part_name"].GetString()]
self._write_to_log = settings["write_to_log_file"].GetBool()
self._my_log_file = settings["log_file_name"].GetString()
self._is_printing_rank = (
self._fluid_model_part.GetCommunicator().MyPID() == 0)
self.mass_conservation_check_process = KratosFluid.MassConservationCheckProcess(
self._fluid_model_part, settings)
if self._is_printing_rank:
KratosMultiphysics.Logger.PrintInfo(
"ApplyMassConservationCheckProcess", "Construction finished.")
def ActivateSpalartAllmaras(self, wall_nodes, DES, CDES=1.0):
import KratosMultiphysics.FluidDynamicsApplication as KCFD
for node in wall_nodes:
node.SetValue(IS_VISITED, 1.0)
distance_calculator = BodyDistanceCalculationUtils()
distance_calculator.CalculateDistances2D(
self.model_part.Elements, DISTANCE, 100.0)
non_linear_tol = 0.001
max_it = 10
reform_dofset = self.ReformDofAtEachIteration
time_order = self.time_order
pPrecond = DiagonalPreconditioner()
turbulence_linear_solver = BICGSTABSolver(1e-20, 5000, pPrecond)
turbulence_model = KCFD.SpalartAllmarasTurbulenceModel(
self.model_part,
turbulence_linear_solver,
self.domain_size,
non_linear_tol,
max_it,
reform_dofset,
time_order)
turbulence_model.AdaptForFractionalStep()
if(DES):
turbulence_model.ActivateDES(CDES)
self.solver.AddInitializeIterationProcess(turbulence_model)
def ExecuteFinalizeSolutionStep(self):
current_time = self.fluid_model_part.ProcessInfo[
KratosMultiphysics.TIME]
if ((current_time >= self.interval[0])
and (current_time < self.interval[1])):
# Integrate the drag over the model part elements
drag_force = KratosCFD.DragUtilities().CalculateEmbeddedDrag(
self.fluid_model_part)
# Print drag values to screen
if (self.print_drag_to_screen) and (
self.fluid_model_part.GetCommunicator().MyPID() == 0):
print("DRAG VALUES:")
print("Current time: " + str(current_time) + " x-drag: " +
str(drag_force[0]) + " y-drag: " + str(drag_force[1]) +
" z-drag: " + str(drag_force[2]))
# Print drag values to file
if (self.write_drag_output_file) and (
self.fluid_model_part.GetCommunicator().MyPID() == 0):
with open(self.drag_filename, 'a') as file:
file.write(
str(current_time) + " " + str(drag_force[0]) +
" " + str(drag_force[1]) + " " +
str(drag_force[2]) + "\n")
file.close()
def __CreateDistanceModificationProcess(self):
# Set the distance modification settings according to the level set type
if (self.level_set_type == "continuous"):
distance_modification_settings = KratosMultiphysics.Parameters(
r'''{
"model_part_name": "",
"distance_threshold": 1e-3,
"continuous_distance": true,
"check_at_each_time_step": true,
"avoid_almost_empty_elements": true,
"deactivate_full_negative_elements": true
}''')
elif (self.level_set_type == "discontinuous"):
distance_modification_settings = KratosMultiphysics.Parameters(
r'''{
"model_part_name": "",
"distance_threshold": 1e-4,
"continuous_distance": false,
"check_at_each_time_step": true,
"avoid_almost_empty_elements": false,
"deactivate_full_negative_elements": false
}''')
else:
err_msg = 'Level set type is: \'' + self.level_set_type + '\'. Expected \'continuous\' or \'discontinuous\'.'
raise Exception(err_msg)
# Set the volume model part name in which the distance modification is applied to
volume_model_part_name = self.settings["fluid_solver_settings"][
"volume_model_part_name"].GetString()
distance_modification_settings["model_part_name"].SetString(
volume_model_part_name)
# Construct and return the distance modification process
return KratosFluid.DistanceModificationProcess(
self.model, distance_modification_settings)
def __CreateAccelerationLimitationUtility(self):
maximum_multiple_of_g_acceleration_allowed = 5.0
acceleration_limitation_utility = KratosCFD.AccelerationLimitationUtilities(
self.GetComputingModelPart(),
maximum_multiple_of_g_acceleration_allowed)
return acceleration_limitation_utility
def __init__(self, Model, settings):
KratosMultiphysics.Process.__init__(self)
# Check the default values
default_settings = KratosMultiphysics.Parameters( """
{
"model_part_name" : "CHOOSE_FLUID_MODELPART_NAME",
"gravity" : [0.0,0.0,0.0],
"ambient_temperature" : 273.0
} """ )
# Note: if the thermal expansion coefficient is not provided, it is computed as
# 1/AMBIENT_TEMPERATURE which is the usual assumption for perfect gases.
if (settings.Has("thermal_expansion_coefficient")):
default_settings.AddEmptyValue("thermal_expansion_coefficient").SetDouble(0.0)
settings.ValidateAndAssignDefaults(default_settings)
# Get the fluid model part from the Model container
self.fluid_model_part = Model[settings["model_part_name"].GetString()]
# Save the ambient temperature in the fluid model part ProcessInfo
ambient_temperature = settings["ambient_temperature"].GetDouble()
self.fluid_model_part.ProcessInfo.SetValue(KratosMultiphysics.AMBIENT_TEMPERATURE, ambient_temperature)
# Set the Boussinesq force process
self.BoussinesqForceProcess = KratosFluid.BoussinesqForceProcess(self.fluid_model_part, settings)
def _CreateScheme(self):
response_function = self.GetResponseFunction()
scheme_type = self.settings["scheme_settings"]["scheme_type"].GetString()
domain_size = self.main_model_part.ProcessInfo[KratosMultiphysics.DOMAIN_SIZE]
# the schemes used in fluid supports SLIP conditions which rotates element/condition
# matrices based on nodal NORMAL. Hence, the consistent adjoints also need to
# rotate adjoint element/condition matrices accordingly. Therefore, following
# schemes are used.
if scheme_type == "bossak":
scheme = KratosCFD.VelocityBossakAdjointScheme(self.settings["scheme_settings"], response_function, domain_size, domain_size + 1)
elif scheme_type == "steady":
scheme = KratosCFD.SimpleSteadyAdjointScheme(response_function, domain_size, domain_size + 1)
else:
raise Exception("Invalid scheme_type: " + scheme_type)
return scheme
def __init__(self, model, params):
Kratos.OutputProcess.__init__(self)
default_settings = Kratos.Parameters('''{
"response_type" : "PLEASE_SPECIFY_RESPONSE_TYPE",
"model_part_name" : "PLEASE_SPECIFY_MAIN_MODEL_PART_NAME",
"response_settings" : {},
"output_file_settings": {}
}''')
self.model = model
self.params = params
self.main_model_part = self.model.GetModelPart(
self.params["model_part_name"].GetString())
self.params.ValidateAndAssignDefaults(default_settings)
self.output_file = None
response_type = self.params["response_type"].GetString()
if (response_type == "norm_square"):
self.response = KratosCFD.VelocityPressureNormSquareResponseFunction(
self.params["response_settings"], self.model)
else:
raise Exception(
"Unknown response_type = \"" + response_type +
"\". Supported response types are: \n\t 1. norm_square")
def __CreateDistanceModificationProcess(self):
# Set suitable distance correction settings for free-surface problems
# Note that the distance modification process is applied to the computing model part
distance_modification_settings = self.settings["distance_modification_settings"]
distance_modification_settings.ValidateAndAssignDefaults(self.GetDefaultParameters()["distance_modification_settings"])
distance_modification_settings["model_part_name"].SetString(self.GetComputingModelPart().FullName())
# Check user provided settings
if not distance_modification_settings["continuous_distance"].GetBool():
distance_modification_settings["continuous_distance"].SetBool(True)
KratosMultiphysics.Logger.PrintWarning("Provided distance correction \'continuous_distance\' is \'False\'. Setting to \'True\'.")
if not distance_modification_settings["check_at_each_time_step"].GetBool():
distance_modification_settings["check_at_each_time_step"].SetBool(True)
KratosMultiphysics.Logger.PrintWarning("Provided distance correction \'check_at_each_time_step\' is \'False\'. Setting to \'True\'.")
if distance_modification_settings["avoid_almost_empty_elements"].GetBool():
distance_modification_settings["avoid_almost_empty_elements"].SetBool(False)
KratosMultiphysics.Logger.PrintWarning("Provided distance correction \'avoid_almost_empty_elements\' is \'True\'. Setting to \'False\' to avoid modifying the distance sign.")
if distance_modification_settings["deactivate_full_negative_elements"].GetBool():
distance_modification_settings["deactivate_full_negative_elements"].SetBool(False)
KratosMultiphysics.Logger.PrintWarning("Provided distance correction \'deactivate_full_negative_elements\' is \'True\'. Setting to \'False\' to avoid deactivating the negative volume (e.g. water).")
# Create and return the distance correction process
return KratosCFD.DistanceModificationProcess(
self.model,
distance_modification_settings)
def testFlowsMeasuring3D_1(self):
vel = Kratos.Array3()
vel[0] = 0.0
vel[1] = 0.0
vel[2] = 1.0
node = self.fluid_model_part.CreateNewNode(1, 0.0, 0.0, 0.0)
node.SetSolutionStepValue(Kratos.VELOCITY, vel)
node = self.fluid_model_part.CreateNewNode(2, 1.0, 0.0, 0.0)
node.SetSolutionStepValue(Kratos.VELOCITY, vel)
node = self.fluid_model_part.CreateNewNode(3, 0.0, 1.0, 0.0)
node.SetSolutionStepValue(Kratos.VELOCITY, vel)
node = self.fluid_model_part.CreateNewNode(4, 1.0, 1.0, 0.0)
node.SetSolutionStepValue(Kratos.VELOCITY, vel)
vel[0] = 1.0
vel[1] = 0.0
vel[2] = 0.0
node = self.fluid_model_part.CreateNewNode(5, 2.0, 0.0, 0.0)
node.SetSolutionStepValue(Kratos.VELOCITY, vel)
node = self.fluid_model_part.CreateNewNode(6, 2.0, 0.0, 1.0)
node.SetSolutionStepValue(Kratos.VELOCITY, vel)
node = self.fluid_model_part.CreateNewNode(7, 2.0, 1.0, 0.0)
node.SetSolutionStepValue(Kratos.VELOCITY, vel)
condition_name = "SurfaceCondition3D3N"
self.fluid_model_part.CreateNewCondition(
condition_name, 1, [1, 2, 3],
self.fluid_model_part.GetProperties()[0])
self.fluid_model_part.CreateNewCondition(
condition_name, 2, [3, 2, 4],
self.fluid_model_part.GetProperties()[0])
self.fluid_model_part.CreateNewCondition(
condition_name, 3, [5, 6, 7],
self.fluid_model_part.GetProperties()[0])
first_smp = self.fluid_model_part.CreateSubModelPart("first")
first_smp.AddConditions([1, 2])
second_smp = self.fluid_model_part.CreateSubModelPart("second")
second_smp.AddConditions([3])
flow_value_first = Fluid.FluidPostProcessUtilities().CalculateFlow(
first_smp)
flow_value_second = Fluid.FluidPostProcessUtilities().CalculateFlow(
second_smp)
self.assertAlmostEqual(flow_value_first, 1.0)
self.assertAlmostEqual(flow_value_second, -0.5)
def _CreateScheme(self):
domain_size = self.GetComputingModelPart().ProcessInfo[KratosMultiphysics.DOMAIN_SIZE]
# Cases in which the element manages the time integration
if self.element_integrates_in_time:
# "Fake" scheme for those cases in where the element manages the time integration
# It is required to perform the nodal update once the current time step is solved
scheme = KratosMultiphysics.ResidualBasedIncrementalUpdateStaticSchemeSlip(
domain_size,
domain_size + 1)
# In case the BDF2 scheme is used inside the element, the BDF time discretization utility is required to update the BDF coefficients
if (self.settings["time_scheme"].GetString() == "bdf2"):
time_order = 2
self.time_discretization = KratosMultiphysics.TimeDiscretization.BDF(time_order)
else:
err_msg = "Requested elemental time scheme \"" + self.settings["time_scheme"].GetString()+ "\" is not available.\n"
err_msg += "Available options are: \"bdf2\""
raise Exception(err_msg)
# Cases in which a time scheme manages the time integration
else:
# Bossak time integration scheme
if self.settings["time_scheme"].GetString() == "bossak":
if self.settings["consider_periodic_conditions"].GetBool() == True:
scheme = KratosCFD.ResidualBasedPredictorCorrectorVelocityBossakSchemeTurbulent(
self.settings["alpha"].GetDouble(),
domain_size,
KratosCFD.PATCH_INDEX)
else:
scheme = KratosCFD.ResidualBasedPredictorCorrectorVelocityBossakSchemeTurbulent(
self.settings["alpha"].GetDouble(),
self.settings["move_mesh_strategy"].GetInt(),
domain_size)
# BDF2 time integration scheme
elif self.settings["time_scheme"].GetString() == "bdf2":
scheme = KratosCFD.BDF2TurbulentScheme()
# Time scheme for steady state fluid solver
elif self.settings["time_scheme"].GetString() == "steady":
scheme = KratosCFD.ResidualBasedSimpleSteadyScheme(
self.settings["velocity_relaxation"].GetDouble(),
self.settings["pressure_relaxation"].GetDouble(),
domain_size)
else:
err_msg = "Requested time scheme " + self.settings["time_scheme"].GetString() + " is not available.\n"
err_msg += "Available options are: \"bossak\", \"bdf2\" and \"steady\""
raise Exception(err_msg)
return scheme
def _CreateBuilderAndSolver(self):
linear_solver = self._GetLinearSolver()
if self.settings["consider_periodic_conditions"].GetBool():
builder_and_solver = KratosCFD.ResidualBasedBlockBuilderAndSolverPeriodic(
linear_solver, KratosCFD.PATCH_INDEX)
else:
builder_and_solver = KratosMultiphysics.ResidualBasedBlockBuilderAndSolver(
linear_solver)
return builder_and_solver
def Factory(settings, model):
if(type(settings) != KratosMultiphysics.Parameters):
raise Exception("expected input shall be a Parameters object, encapsulating a json string")
if not settings["Parameters"].Has("model_part_name"):
msg = "Provided settings argument does not contain the model part name.\n"
msg += "Please provide it as the Parameters/model_part_name (string) argument."
raise Exception(msg)
return KratosCFD.IntegrationPointStatisticsProcess(model, settings["Parameters"])