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NickNick9 merged 1 commit into from
May 26, 2026
Merged

3d Toyota example #159

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32 changes: 32 additions & 0 deletions iga/use_cases/toyota_3d_sbm/FluidMaterials.json
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{
"properties" : [
{
"model_part_name" : "IgaModelPart",
"properties_id" : 1,
"Material" : {
"constitutive_law" : {
"name" : "Newtonian3DLaw"
},
"Variables" : {
"DENSITY" : 1.0,
"DYNAMIC_VISCOSITY" : 1e-3,
"PENALTY_FACTOR": 1e3
},
"Tables" : null
}
},
{
"model_part_name" : "IgaModelPart.SBM_Support_inner",
"properties_id" : 2,
"Material" : {
"constitutive_law" : {
"name" : "Newtonian3DLaw"
},
"Variables" : {
"PENALTY_FACTOR": 0.0
},
"Tables" : null
}
}
]
}
229 changes: 229 additions & 0 deletions iga/use_cases/toyota_3d_sbm/ProjectParameters_3D_fluid.json
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{
"analysis_stage": "KratosMultiphysics.FluidDynamicsApplication.fluid_dynamics_analysis",

"problem_data": {
"problem_name": "example_1_kratos",
"echo_level": 1,
"parallel_type": "OpenMP",
"start_time": 0.0,
"end_time": 4.0
// "end_time": 1.0
},

"solver_settings": {
"solver_type": "Monolithic",
"time_scheme": "bdf2_higher_order_vms",
"analysis_type": "non_linear",
"model_part_name": "IgaModelPart",
"domain_size": 3,
"model_import_settings": { "input_type": "use_input_model_part" },
"material_import_settings": { "materials_filename": "FluidMaterials.json" },
"linear_solver_settings": { "solver_type": "bicgstab", "tolerance": 1.0e-14, "max_iteration": 1000, "scaling": true, "preconditioner_type": "ilu0"},
// "linear_solver_settings":{
// // "solver_type": "LinearSolversApplication.sparse_lu"
// "solver_type": "skyline_lu_factorization"
// },
"echo_level": 1,
"enforce_element_and_conditions_replacement": false,
"compute_reactions": false,
"maximum_iterations": 100,
"relative_velocity_tolerance": 1e-9,
"absolute_velocity_tolerance": 1e-9,
"relative_pressure_tolerance": 1e-7,
"absolute_pressure_tolerance": 1e-7,
// "relative_velocity_tolerance": 1e-14,
// "absolute_velocity_tolerance": 1e-14,
// "relative_pressure_tolerance": 1e-12,
// "absolute_pressure_tolerance": 1e-12,
"time_stepping": {
// "time_step" : 1e20,
// "time_step" : 0.0025,
// "time_step" : 1.0,
// "time_step" : 0.5,
// "time_step" : 0.2,
// "time_step" : 0.1,
// "time_step" : 0.05, //
// "time_step" : 0.02,
"time_step" : 0.01,
// "time_step" : 0.005,
// "time_step" : 0.0025,
"automatic_time_step": false
}
},

"modelers": [
{
"modeler_name" : "import_mdpa_modeler",
"kratos_module" : "KratosMultiphysics",
"Parameters" : {
"input_filename" : "toyota_immersed_surface_sbm",
"model_part_name" : "initial_skin_model_part_in"
}
},
{
"modeler_name": "NurbsGeometryModelerSbm",
"Parameters": {
"model_part_name" : "IgaModelPart",
"lower_point_xyz": [-0.2142325,-0.04246225,0.01640625],
"upper_point_xyz": [0.1763925,0.3481627,1.5],
"lower_point_uvw": [-0.2142325,-0.04246225,0.01640625],
"upper_point_uvw": [0.1763925,0.3481627,1.5],

"polynomial_order" : [1,
1,
1],
// "number_of_knot_spans" : [30,
// 30,
// 90],
"number_of_knot_spans" : [25,
25,
70],
"lambda_outer": 0.5,
"lambda_inner": 0.0,
"number_of_inner_loops": 1,
// "skin_model_part_outer_initial_name": "initial_skin_model_part_out",
"skin_model_part_inner_initial_name": "initial_skin_model_part_in",
"skin_model_part_name": "skin_model_part"
}
},
{
"modeler_name": "IgaModelerSbm",
"Parameters": {
"echo_level": 0,
"skin_model_part_name": "skin_model_part",
"analysis_model_part_name": "IgaModelPart",
"element_condition_list": [
{
"geometry_type" : "GeometryVolume",
"iga_model_part" : "FluidDomain",
"type" : "element",
"name" : "NavierStokesElement",
// "name" : "StokesElement",
"shape_function_derivatives_order" : 3
},
{
"geometry_type": "GeometrySurface",
"brep_ids" : [4,5,6,7],
"iga_model_part": "SBM_Support_outer",
"type": "condition",
"name": "SupportFluidCondition",
"shape_function_derivatives_order": 4
},
{
"geometry_type": "GeometrySurface",
"brep_ids" : [2],
"iga_model_part": "Support_inlet",
"type": "condition",
"name": "SupportFluidCondition",
"shape_function_derivatives_order": 4
},
{
"geometry_type": "GeometrySurface",
"brep_ids" : [3],
"iga_model_part": "SupportOuterPressure",
"type": "condition",
"name": "SupportPressureCondition",
"shape_function_derivatives_order": 3
},
{
"geometry_type": "GeometrySurface",
"iga_model_part": "SBM_Support_inner",
"type": "condition",
"name": "SbmFluidConditionDirichlet",
"shape_function_derivatives_order": 6,
"sbm_parameters": {
"is_inner" : true
}
}
]
}
}
],
"processes": {
"additional_processes": [
{
"python_module": "assign_iga_external_conditions_process",
"kratos_module": "KratosMultiphysics.IgaApplication",
"process_name": "AssignIgaExternalConditionsProcess",
"Parameters": {
"echo_level": 0,
"element_condition_list": [
{
"iga_model_part": "IgaModelPart.FluidDomain",
"variables": [
{
"variable_name": "BODY_FORCE",
"value": ["0", "0", "0"] // linear
// NAVIER STOKES
// "value": ["(cosh(x)*sinh(x)*cosh(y)*cosh(y)*cosh(z)*cosh(z) + cosh(x)*sinh(x)*sinh(y)*cosh(z)*sinh(z-y) - cosh(x)*sinh(x)*sinh(y)*cosh(y)*cosh(z)*sinh(z)) + cosh(x) - 3*cosh(x)*cosh(y)*cosh(z)", "(cosh(x)*cosh(x)*cosh(y)*cosh(z)*sinh(z-y) - sinh(x)*sinh(x)*sinh(z-y)*cosh(z-y) - sinh(x)*sinh(x)*sinh(y)*cosh(z)*cosh(z-y)) + sinh(y) - 3*sinh(x)*sinh(z-y)", "(-cosh(x)*cosh(x)*cosh(y)*sinh(y)*cosh(z)*cosh(z) - sinh(x)*sinh(x)*sinh(z-y)*cosh(y)*cosh(z) + sinh(x)*sinh(x)*sinh(y)*sinh(y)*cosh(z)*sinh(z)) + cosh(z) + 3*sinh(x)*sinh(y)*cosh(z)"]
}
]
},
{
"iga_model_part": "IgaModelPart.SBM_Support_outer",
"variables": [
{
"variable_name": "VELOCITY",
"value": [
"0.0",
"0.0",
"0.0"
]
// "value": ["cosh(x)*cosh(y)*cosh(z)","sinh(x)*sinh(z-y)","-sinh(x)*sinh(y)*cosh(z)"]
}]
},
{
"iga_model_part": "IgaModelPart.Support_inlet",
"variables": [
{
"variable_name": "VELOCITY",
"value": [
"0.0",
"0.0",
"2.0 * 0.5*(t/2.0 + 1.0 - abs(t/2.0 - 1.0))"
]
// "value": ["cosh(x)*cosh(y)*cosh(z)","sinh(x)*sinh(z-y)","-sinh(x)*sinh(y)*cosh(z)"]
}]
},
{
"iga_model_part": "IgaModelPart.SupportOuterPressure",
"variables": [
{
"variable_name": "PRESSURE",
"value": "0.0"
// "value": "sinh(x) + cosh(y) + sinh(z)"
},
{
"variable_name": "NORMAL_STRESS",
"value": [
"0.0",
"0.0",
"0.0"
]
}]
}
]
}
}
],
"dirichlet_process_list": [
{
"kratos_module": "KratosMultiphysics",
"python_module": "assign_vector_variable_to_nodes_process",
"Parameters": {
"model_part_name": "skin_model_part.inner",
"variable_name": "VELOCITY",
"value": [
"0.0",
"0.0",
"0.0"
]
// "value": ["cosh(x)*cosh(y)*cosh(z)","sinh(x)*sinh(z-y)","-sinh(x)*sinh(y)*cosh(z)"]
}
}
],
"constraints_process_list": []
},

"output_processes": { "output_process_list": [] }
}
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