def _CreateSolutionStrategy(self):
computing_model_part = self.GetComputingModelPart()
epetra_communicator = self._GetEpetraCommunicator()
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 = TrilinosFluid.TrilinosFractionalStepSettingsPeriodic(
epetra_communicator, 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 = TrilinosFluid.TrilinosFractionalStepSettings(
epetra_communicator, 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(
TrilinosFluid.TrilinosStrategyLabel.Pressure, linear_solvers[0],
self.settings["pressure_tolerance"].GetDouble(),
self.settings["maximum_pressure_iterations"].GetInt())
fractional_step_settings.SetStrategy(
TrilinosFluid.TrilinosStrategyLabel.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():
solution_strategy = TrilinosFluid.TrilinosFractionalStepStrategy(
computing_model_part, fractional_step_settings,
self.settings["predictor_corrector"].GetBool(),
self.settings["compute_reactions"].GetBool(),
KratosCFD.PATCH_INDEX)
else:
solution_strategy = TrilinosFluid.TrilinosFractionalStepStrategy(
computing_model_part, fractional_step_settings,
self.settings["predictor_corrector"].GetBool(),
self.settings["compute_reactions"].GetBool())
return solution_strategy
def Initialize(self):
## Construct the communicator
self.EpetraComm = KratosTrilinos.CreateCommunicator()
## Get the computing model part
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 = TrilinosFluid.TrilinosFractionalStepSettingsPeriodic(
self.EpetraComm, 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(),
KratosFluid.PATCH_INDEX)
else:
self.solver_settings = TrilinosFluid.TrilinosFractionalStepSettings(
self.EpetraComm, 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(
TrilinosFluid.TrilinosStrategyLabel.Velocity,
self.velocity_linear_solver,
self.settings["velocity_tolerance"].GetDouble(),
self.settings["maximum_velocity_iterations"].GetInt())
self.solver_settings.SetStrategy(
TrilinosFluid.TrilinosStrategyLabel.Pressure,
self.pressure_linear_solver,
self.settings["pressure_tolerance"].GetDouble(),
self.settings["maximum_pressure_iterations"].GetInt())
self.solver = TrilinosFluid.TrilinosFSStrategy(
self.computing_model_part, self.solver_settings,
self.settings["predictor_corrector"].GetBool(),
KratosFluid.PATCH_INDEX)
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()
KratosMultiphysics.Logger.PrintInfo(
"TrilinosNavierStokesSolverFractionalStep",
"Initialization TrilinosNavierStokesSolverFractionalStep finished")