FSI

Activate the Fluid Structure Interaction module.

Usage: FSI <SolverInstanceName> <InputFileCalculiX> <PanelFamilyName1> <PanelFamilyName2> <PanelFamilyName>..

Parameters

InputFileStructure	CalucliX input file (without file extention)
PanelFamilyName	TRACE panel family which covers the solid structure which is simulated

Domain: all

Example: all immediate FSI myStructure ccx row01_blade_ss row01_blade_ps

Since: 9.1

FSIrelaxation

Activate relaxation for Fluid Structure Interaction module.

Usage: FSIrelaxation <SolverInstanceName> <Method> <relaxationParameter>

Parameters

relaxationParameter relaxation factor for fixed point iteration

Domain: all

Example: all immediate FSIrelaxation myStructure FixedPoint 0.9

all immediate FSIrelaxation myStructure Aitken

Since: 9.1

FSInPseudoTimeStepsCoupling

Set the number of pseudo time steps for the flow solver between consecutive FSI subiterations.

Usage: FSInPseudoTimeStepsCoupling <numberOfPseudoTimeSteps>

Parameters

numberOfPseudoTimeSteps number of pseudo time steps

Domain: all

Example: all immediate FSInPseudoTimeStepsCoupling 10

Since: 9.1

FSIUnitConversion

Set the unit conversion factors for the FSI module.

Usage: FSIUnitConversion <SolverInstanceName> <conversionFactorPressure2ccx> <conversionFactorDisplacement2TRACE> <conversionFactorVelocity2TRACE>

Parameters

conversionFactorPressure2ccx	convert pressure from TRACE (Pa) to CalculiX (e.g. MPa)
conversionFactorDisplacement2TRACE	convert displacement from CalculiX (e.g. mm) to TRACE (m)
conversionFactorVelocity2TRACE	convert velocity from CalculiX (e.g. mm/s) to TRACE (m/s)

Domain: all

Example: all immediate FSIUnitConversion myStructure 1.0e-6 1.0e-3 1.0e-3

Since: 9.1

FSIUnitConversionHeat

Set the unit conversion factors for conjugated heat transfer analysis.

Usage: FSIUnitConversion <SolverInstanceName> <conversionFactorHeatFlux2ccx> <conversionFactorTemperature2TRACE>

Parameters

conversionFactorHeatFlux2ccx	convert heat flux from TRACE (W/m^2) to CalculiX (e.g. W/mm^2)
conversionFactorTemperature2TRACE	convert displacement from CalculiX (e.g. K) to TRACE (K)

Domain: all

Example: all immediate FSIUnitConversionHeat myStructure 1.0e-6 1.0

Since: 9.1

FSITransformationMatrix

Specify the file containing the transformation matrix for the structure to transform the CSM surface onto the CFD surface.

Usage: FSITransformationMatrix <SolverInstanceName> <transformation_matrix_file.dat>

Parameters

transformation_matrix_file.dat file containing the matrix and the translation vector

Domain: all

Example: all immediate FSITransformationMatrix myStructure mapping_transformation.dat

Since: 9.1

FSIInitialDeflectionSteadyLoadFactor

Specify an initial deflection for the structure by applying a fraction of the steady pressure and letting CalculiX compute a number of timesteps.

Usage: FSIInitialDeflectionSteadyLoadFactor <SolverInstanceName> <steadyLoadFector> <nSteps>

Parameters

steadyLoadFector	fraction of the steady pressure
steadyLoadFector	number of timesteps

Domain: all

Example: all immediate FSIInitialDeflectionSteadyLoadFactor myStructure 0.2 5

Since: 9.1

FSISurfaceInterpolationPressure

Choose the surface interpolation for the interpolation of the surface pressure of the FSI module.

Usage: FSISurfaceInterpolationPressure <SolverInstanceName> <Method> <r>

Parameters

Method	interpolation method (e.g. RadialBasisFunctionC2 or NearestNeighbour)
r	support radius of the basis function if RadialBasisFunctions are used

Domain: all

Example: all immediate FSISurfaceInterpolationPressure myStructure RadialBasisFunctionC2 0.01

Since: 9.1

FSIdummy

Active an FSI dummy motion. t: translation, off: offset, the rest: deformation gradient

Usage: FSIdummy <SolverInstanceName> <x_t> <y_t> <z_t> <x_off> <y_off> <z_off> <xx> <xy> <xz> <yx> <yy> <yz> <zx> <zy> <zz>

Parameters

many many

Domain: all

Since: 9.1

setDeformationSolverRelativeBound

Set the deformation tolerance for the GMRES deformation solver used during FSI simulations.

Usage: setDeformationSolverRelativeBound <tol>

Parameters

tol	the tolerance

Domain: all

Example: all immediate setDeformationSolverRelativeBound 1e-6

Since: 9.1

FSIuseInitialSolutionPressureAsPressureOffset

Fluid-Structure Interaction: Use initial solution pressure as pressure offset.

Usage: FSIuseInitialSolutionPressureAsPressureOffset <SolverInstanceName>

Domain: all

Example: all immediate FSIuseInitialSolutionPressureAsPressureOffset myStructure

Since: 9.1

FSISurfaceTecplotOutput

Fluid-Structure Interaction: Write the fluid and structural surface mesh (plus displacement and pressure) to a tecplot ascii file. A path for the output must be specified. After one period (set with GMC in TRACE unsteady settings) the data will be overwritten.

Usage: FSISurfaceTecplotOutput <SolverInstanceName> <interleave> <path> [subiteration]

FSISurfaceTecplotOutput <SolverInstanceName> <interleave> <path>

Parameters

interleave	specifies the interleave for the output (e.g. 10: every 10 timesteps of a period the surface data is written).
subiteration	Optional flag: subiteration (the surface data is written out each pseudo time step)

Domain: all

Example: all immediate FSISurfaceTecplotOutput myStructure 10 ../output/fsisurface

all immediate FSISurfaceTecplotOutput myStructure 10 ../output/fsisurface subiteration

Since: 9.1

FSIMirrorCoordinate

Fluid-Structure Interaction: Mirror the structural model at a plane normal to the specified axis in the origin.

Usage: FSIMirrorCoordinate <SolverInstanceName> <x|y|z>

Domain: all

Example: all immediate FSIMirrorCoordinate myStructure y

Since: 9.1

FSICyclicSymmetricVirtualPassages

Fluid-Structure Interaction: Create virtual passages to assemble a full 360 degree blade row or part of it. The Parameter <Model no. of segments> describes the number of segments to be modeled (including the already existing one). The flag "clockwise" can be appended to the command which will rotate the virtual segments in the opposite direction (useful if only a part of a blade row should be assembled).

Usage: FSICyclicSymmetricVirtualPassages <SolverInstanceName> <Total no. of segments for full annulus> <Model no. of segments>

Domain: all

Example: all immediate FSICyclicSymmetricVirtualPassages myStructure 5 50

Since: 9.1

FSIPreCalculationPerformSteps

Fluid-Structure Interaction: Specify the total number of pre-calculation steps in the CalculiX input file. The default is one step.

Usage: FSIPerformPreCalculationSteps <SolverInstanceName> <NoTotalStepsInCCXInputFile>

Domain: all

Example: all immediate FSIPerformPreCalculationSteps myStructure 3

Since: 9.1

FSIPreCalculationApplyPressureAtStep

Fluid-Structure Interaction: Specify the pre-calculation step in the CalculiX input file at which the static pressure should be applied to the structural surface.

Usage: FSIPreCalculationApplyPressureAtStep <SolverInstanceName> <StepNo>

Domain: all

Example: all immediate FSIPreCalculationApplyPressureAtStep myStructure 2

Since: 9.1

FSIPreCalculationReadStaticDeformationAtStep

Fluid-Structure Interaction: Specify the pre-calculation step in the CalculiX input file at which the static deformation should be read from the structural solver and saved as offset.

Usage: FSIPreCalculationReadStaticDeformationAtStep <SolverInstanceName> <StepNo> <StaticDeformationFile>

Domain: all

Example: all immediate FSIPreCalculationReadStaticDeformationAtStep myStructure 2 ../output/fsi/CalculiXStaticDeformation.dat

Since: 9.1

FSIPreCalculationSaveSolverStatusAfterStep

Fluid-Structure Interaction: Specify the pre-calculation step in the CalculiX input file after which the status of the external solver should be saved as initialization for the coupled simulation.

Usage: FSIPreCalculationSaveSolverStatusAfterStep <SolverInstanceName> <StepNo>

Domain: all

Example: all immediate FSIPreCalculationSaveSolverStatusAfterStep myStructure 3

Since: 9.1

FSIExternalSolverActivateNonlinearGeometricEffects

Fluid-Structure Interaction: Turn on geometric variations for e.g. modal dynamic calculations.

Usage: FSIExternalSolverActivateNonlinearGeometricEffects <SolverInstanceName>

Domain: all

Example: all immediate FSIExternalSolverActivateNonlinearGeometricEffects myStructure

Since: 9.1

FSIExternalSolverOutputInterleave

Fluid-Structure Interaction: Set the output interleave for the external solver. The interleave refers to the number of time steps per TRACE period.

Usage: FSIExternalSolverOutputInterleave <SolverInstanceName> <Interleave> [subiterationFlag]

Domain: all

Example: all immediate FSIExternalSolverOutputInterleave myStructure 4

all immediate FSIExternalSolverOutputInterleave myStructure 4 subiteration

Since: 9.2

FSIStructureMeshFlipSurfaceNormals

Fluid-Structure Interaction: Flips the surface normals of the structure mesh for the displacement mapping. This command is necessary if the surface normal orientation of the structure mesh points in the wrong direction causing the displacement mapping to map displacements from on side of a structure (e.g. suction side of a blade) to the opposite side of the structure (e.g. pressure side of a blade).

Usage: FSIStructureMeshFlipSurfaceNormals <SolverInstanceName>

Domain: all

Example: all immediate FSIStructureMeshFlipSurfaceNormals myStructure

Since: 9.2

FSIExternalSolverSetTimeIncrement

Fluid-Structure Interaction: This command will instruct TRACE to not override the time increment setting in the external solver. Thus smaller time increments than a TRACE timestep for the external solver are possible. The unit of the time increment is the unit the external solver expects (usually seconds).

Usage: FSIExternalSolverSetTimeIncrement <SolverInstanceName> <time increment>

Domain: all

Example: all immediate FSIExternalSolverSetTimeIncrement myStructure 0.002

Since: 9.2

FSIAnalysisPoint

Specify an analysis point for the FSI module which tracks the deformation of a point lying on the solid surface.

Usage: FSIAnalysisPoint <ZoneID> <I> <J> <K> <output_file.dat>

Parameters

ZoneID	zone number
I	i index of the structured mesh
J	j index of the structured mesh
K	k index of the structured mesh
output_file.dat	output filename

Domain: all

Example: all immediate FSIAnalysisPoint 9 1 1 14 displacement_corner_tip_trailingedge.dat

Since: 9.1

useDGCLsimplified

Use a less accurate but faster implementation of the DGCL.

Usage: useDGCLsimplified

Domain: all, component, stage, group, blockGroup, block

Example: all immediate useDGCLsimplified

Since: 9.1