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coupled_fluid_thermal_solver.py
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coupled_fluid_thermal_solver.py
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from __future__ import print_function, absolute_import, division # makes KratosMultiphysics backward compatible with python 2.6 and 2.7
import sys
# Importing the Kratos Library
import KratosMultiphysics
# Check that applications were imported in the main script
KratosMultiphysics.CheckRegisteredApplications("FluidDynamicsApplication")
KratosMultiphysics.CheckRegisteredApplications("ConvectionDiffusionApplication")
# Import applications
import KratosMultiphysics.FluidDynamicsApplication as KratosCFD
import KratosMultiphysics.ConvectionDiffusionApplication as ConvDiff
def CreateSolver(main_model_part, custom_settings):
return CoupledFluidThermalSolver(main_model_part, custom_settings)
class CoupledFluidThermalSolver(object):
def __init__(self, main_model_part, custom_settings):
self.main_model_part = main_model_part
default_settings = KratosMultiphysics.Parameters("""
{
"solver_type" : "ThermallyCoupled",
"fluid_solver_settings": {
"solver_type": "navier_stokes_solver_vmsmonolithic",
"model_import_settings": {
"input_type": "mdpa",
"input_filename": "unknown_name"
}
},
"thermal_solver_settings": {
"solver_type": "Transient",
"analysis_type": "linear",
"model_import_settings": {
"input_type": "use_input_model_part",
"input_filename": "unknown_name"
},
"computing_model_part_name": "Thermal",
"material_import_settings": {
"materials_filename": "ThermicMaterials.json"
},
"convection_diffusion_variables": {
"density_variable": "DENSITY",
"diffusion_variable": "CONDUCTIVITY",
"unknown_variable": "TEMPERATURE",
"volume_source_variable": "HEAT_FLUX",
"surface_source_variable": "FACE_HEAT_FLUX",
"projection_variable": "PROJECTED_SCALAR1",
"convection_variable": "CONVECTION_VELOCITY",
"mesh_velocity_variable": "MESH_VELOCITY",
"transfer_coefficient_variable": "",
"velocity_variable": "VELOCITY",
"specific_heat_variable": "SPECIFIC_HEAT",
"reaction_variable": "REACTION_FLUX"
}
}
}
""")
## Overwrite the default settings with user-provided parameters
self.settings = custom_settings
self.settings.ValidateAndAssignDefaults(default_settings)
import python_solvers_wrapper_fluid
self.fluid_solver = python_solvers_wrapper_fluid.CreateSolverByParameters(self.main_model_part, self.settings["fluid_solver_settings"],"OpenMP")
self.thermal_model_part = KratosMultiphysics.ModelPart("thermal_model_part")
modeler = KratosMultiphysics.ConnectivityPreserveModeler()
modeler.GenerateModelPart(self.main_model_part, self.thermal_model_part, "Element2D3N", "Condition2D2N")
import python_solvers_wrapper_convection_diffusion
self.thermal_solver = python_solvers_wrapper_convection_diffusion.CreateSolverByParameters(self.thermal_model_part,self.settings["thermal_solver_settings"],"OpenMP")
def AddVariables(self):
self.fluid_solver.AddVariables()
#this is a HACK: TODO: cleanup so that this is not needed in the future
#the problem is that variables are not added to the fluid_solver.MainModelPart who is in charge of creating the nodes
self.tmp = self.thermal_solver.main_model_part
self.thermal_solver.main_model_part = self.fluid_solver.main_model_part
self.thermal_solver.AddVariables()
#this is a HACK: TODO: cleanup so that this is not needed in the future
self.thermal_solver.main_model_part = self.tmp
def ImportModelPart(self):
self.fluid_solver.ImportModelPart()
#here cloning the fluid modelpart to thermal_model_part so that the nodes are shared
#convection_diffusion_settings = self.thermal_solver.GetComputingModelPart().ProcessInfo.GetValue(KratosMultiphysics.CONVECTION_DIFFUSION_SETTINGS)
modeler = KratosMultiphysics.ConnectivityPreserveModeler()
modeler.GenerateModelPart(self.main_model_part, self.thermal_model_part, "Element2D3N", "Condition2D2N")
#self.thermal_solver.GetComputingModelPart().ProcessInfo.SetValue(KratosMultiphysics.CONVECTION_DIFFUSION_SETTINGS, convection_diffusion_settings)
self.thermal_solver.ImportModelPart()
def AddDofs(self):
self.fluid_solver.AddDofs()
self.thermal_solver.AddDofs()
def AdaptMesh(self):
pass
def GetComputingModelPart(self):
return self.fluid_solver.GetComputingModelPart()
def GetOutputVariables(self):
pass
def ComputeDeltaTime(self):
return self.fluid_solver.ComputeDeltaTime()
def GetMinimumBufferSize(self):
buffer_size_fluid = self.fluid_solver.GetMinimumBufferSize()
buffer_size_thermal = self.thermal_solver.GetMinimumBufferSize()
return max(buffer_size_fluid, buffer_size_thermal)
def Initialize(self):
self.fluid_solver.Initialize()
self.thermal_solver.Initialize()
def SaveRestart(self):
pass #one should write the restart file here
def Clear(self):
(self.fluid_solver).Clear()
(self.thermal_solver).Clear()
def Check(self):
(self.fluid_solver).Check()
(self.thermal_solver).Check()
def SetEchoLevel(self, level):
(self.fluid_solver).SetEchoLevel(level)
(self.thermal_solver).SetEchoLevel(level)
def AdvanceInTime(self, current_time):
dt = self.ComputeDeltaTime()
new_time = current_time + dt
#NOTE: the cloning is done ONLY ONCE since the nodes are shared
self.main_model_part.CloneTimeStep(new_time)
self.main_model_part.ProcessInfo[KratosMultiphysics.STEP] += 1
return new_time
def InitializeSolutionStep(self):
self.fluid_solver.InitializeSolutionStep()
self.thermal_solver.InitializeSolutionStep()
def Predict(self):
self.fluid_solver.Predict()
self.thermal_solver.Predict()
def SolveSolutionStep(self):
self.fluid_solver.SolveSolutionStep()
self.thermal_solver.SolveSolutionStep()
def FinalizeSolutionStep(self):
self.fluid_solver.FinalizeSolutionStep()
self.thermal_solver.FinalizeSolutionStep()
def Solve(self):
self.InitializeSolutionStep()
self.Predict()
self.SolveSolutionStep()
self.FinalizeSolutionStep()