Object: Input

under Input {
    ...
    Solution = solution-str;
    SolutionIndex = solutionindex-int;
    MultipleSolutionsData = multisolutionsdata-str;
    ParameterData = parameterdata-str;
    ParametricDistanceExponent = patametricdistanceexp-real;
    MaxInterpolatedSolutions = maxinterpolatedsolutions-int;
    SnapshotReferenceSolution = snaprefsolution-str;
    SnapshotReferenceSolutionIndex = snaprefsolutionindex-int;
    StateSnapshotData = statesnapdata-str;
    SuperStateSnapshotData = superstatesnapdata-str;
    AdaptiveSnapshotData = adaptivestatesnapdata-str;
    UnbalancedSnapshotData = unbalancedstatesnapdata-str;
    ProjectionErrorSnapshotData = projerrorsnapdata-str;
    MeshSamplingSnapshotData = meshsamplingsnapdata-str;
    SuperMeshSamplingSnapshotData = supermeshsamplingsnapdata-str;
    TrainingData = trainingdata-str;
    ReducedCoorindates = reducedcoordinates-str;
    GeometryPrefix = geometryprefix-str;
    InputSampleNodes = inputsampnodes-str;
    InputSampleWeights = inputsampweights-str;
    ...
}

solution-str []:
... When Problem.Type = NonlinearRomPreprocessing, this file is used to specify the desired initial condition for the online ROM simulation.

solutionindex-int [1]:
Can be used to specify a certain step of the binary file solution-str to read.

multisolutionsdata-str []:
This file is relevant when it is desired to construct an interpolated initial condition for a nonlinear ROM simulation based on a set of solutions corresponding to points in the parameter domain. This file contains a list of parameters and corresponding solution file names to perform this interpolation. It is required during both the offline and online nonlinear ROM simulations in order to construct an appropriate initial condition. The file is formatted as follows:

numFiles-int
numParams-int
solutionFile1-str solutionIndex1-int
firstParamFile1-real
...
lastParamFile1-real
...

numParams-int:
Dimension of the parameter space for the problem under consideration.

solutionIndex1-int:
The index, using 1-based indexing, of the solution to read from solutionFile1-str. If this field is left blank, AERO-F will read the first solution from the file.

firstParamFile1-real
The first parameter value corresponding to the solution in the first file.

lastParamFile1-real
The last parameter value corresponding to the solution in the first file.

parameterdata-str []:
This file must accompany the file specified by multisolutionsdata-str for online nonlinear ROM simulations. It contains the information related to the queries parameter point at which to form an interpolated initial condition. It is formatted as follows:

numParams-int:
Dimension of the parameter space for the problem under consideration.

firstParam-real
The first parameter value corresponding to the online queried parameter point.

lastParam-real
The last parameter value corresponding to the online queried parameter point.

patametricdistanceexp-real [1.0]:
Exponent for the inverse-distance-based interpolation scheme used to compute an interpolated initial condition.

maxinterpolatedsolutions-int [–]:
If specified, gives the maximum number of nearest solutions to participate in the interpolation of an initial condition at the parameter point specified in parameterdata-str.

snaprefsolution-str []:
Name of the binary solution file containing the solution to be used as the affine offset when constructing a solution approximation subspace for a nonlinear ROM. Only relevant when NonlinearRomPreprocessing.ConstructROB.Snapshots.ReferenceState = Input.

snaprefsolutionindex-int [1]:
Can be used to specify a certain step of the binary file snaprefsolution-str to read.

statesnapdata-str []:
Name of the ASCII file containing the state snapshot files to be used when constructing a reduced order basis. This is relevant when Problem.Type = NonlinearRomPreprocessing. This file consists of:

numFiles-int
snapFilePath1-str startSnaps1-int endSnaps1-int frequency1-int weight1-real
...

startSnaps1-int:
AERO-F will read snapshots from snapFilePath1-str starting with snapshot startSnaps1-int, using 1-based indexing. Set to 0 or 1 for no truncation.

endSnaps1-int:
AERO-F will read snapshots from snapFilePath1-str up to, and including, snapshot endSnaps1-int. Set to 0 to read through the end of snapFilePath1-str.

frequency1-int:
The frequency at which snapshots are read from snapFilePath1-str starting at startSnaps1-int.

weight1-real:
The weight given to all snapshots from snapFilePath1-str. Setting the weight to zero implies a weighting of 1.0 for all snapshots.

superstatesnapdata-str []:
Name of the ASCII file containing the state snapshot files to be used when constructing a reduced order basis in the PMOR-AMR framework. This file has the same structure as statesnapdata-str, however each line in the file corresponds to a snapshot file with a potentially different mesh than the other snapshot files. Thus, reading these files requires loading and unloading the appropriate meshes, which is automatically done for snapshot files specified with this field. Usually, this ASCII file is used to specify snapshots that have been interpolated onto local supermeshes in the PMOR-AMR framework, with each line corresponding to a single local supermesh. This is relevant when Problem.Type = NonlinearRomPreprocessing.

adaptivestatesnapdata-str []:
Name of the ASCII file containing the state snapshot files to be used when computing inner products or interpolating snapshots in the PMOR-AMR framework. This file has the same structure as superstatesnapdata-str. Usually, this ASCII files is used to specify snapshots generated by the HDM.

unbalancedstatesnapdata-str []:
Name of the ASCII file containing the unbalanced state snapshot files to be used when constructing a reduced order basis in the PMOR-AMR framework. This file has the same structure as superstatesnapdata-str.

projerrorsnapdata-str []:
Name of the ASCII file containing state snapshot files to be used for relative projection error calculations. This file has the same format as statesnapdata-str. This is relevant when Problem.Type = NonlinearRomPreprocessing and NonlinearRomPreprocessing.ConstructROB.RelativeProjectionError.ComputeProjectionError = True.

meshsamplingsnapdata-str []:
Name of the ASCII file containing state snapshot files to be used for assembling the training data for construction of a reduced mesh required for a hyperreduced ROM simulation. That is, this file specifies the state snapshots to be used for hyperreduction training using ECSW, or for generating snapshots of the nonlinear residual in order to construct a residual ROB when using the GNAT or least-squares collocation hyperreduction methods. This file has the same format as statesnapdata-str. This is relevant when Problem.Type = NonlinearRomPreprocessing in one of two cases:

a) NonlinearRomPreprocessing.ConstructReducedMesh.ComputeReducedMesh = True and TrainingData = , or

b) when NonlinearRomPreprocessing.ConstructReducedMesh.GenerateTrainingData = True.

supermeshsamplingsnapdata-str []:
Name of the ASCII file containing state snapshot files to be used for assembling the training data for construction of a reduced mesh required for a hyperreduced ROM simulation in the PMOR-AMR framework. This file has the same format as superstatesnapdata-str.

trainingdata-str []:
Name of the ASCII file containing residual snapshot files generated in a previous run with NonlinearRomPreprocessing.ConstructReducedMesh.GenerateTrainingData = True to be used as training data for constructing the reduced mesh required for a hyperreduced ROM simulation. That is, this file specifies the rows of the training matrix to be used for hyperreduction training using ECSW, or the nonlinear residual vectors in order to construct a residual ROB when using the GNAT or least-squares collocation hyperreduction methods. This file has the same format as statesnapdata-str. This is relevant when NonlinearRomPreprocessing.ConstructReducedMesh.ComputeReducedMesh = True.

reducedcoordinates-str []:
When Problem.Type = SteadyNonlinearRomPostprocessing or UnsteadyNonlinearRomPostprocessing, this entry specifies the ASCII file containing the reduced coordinates written during an online ROM simulation as specified under Output.NonlinearROM.ReducedCoordinates.

geometryprefix-str []:
... For online hyperreduced ROM simulations, this entry specifies the prefix name for all files describing the connectivity, geometry, decomposition, CPU map, and distance-to-the-wall generated by SOWER for the reduced mesh constructed during a previous run of AERO-F with Problem.Type = NonlinearRomPreprocessing. These files are written in Ascii XPost format in the location specified by the NonlinearRomFileSystem object. The same goes for walldistance-str and position-str, as well as any other input files that correspond to the reduced mesh.

inputsampnodes-str []:
This file is relevant only when Problem.Type = NonlinearRomPreprocessing and NonlinearRomPreprocessing.ConstructReducedMesh.ComputeReducedMesh = True. If NonlinearRomPreprocessing.ConstructReducedMesh.UseInputSamplingSolution = True, this file must be specified and is used to specify the sample nodes used for constructing the reduced mesh. If NonlinearRomPreprocessing.ConstructReducedMesh.UseInputSamplingSolution = False, these nodes will be used as hot-start indices to accelerate the convergence of the sampling algorithm. It is formatted as follows:

inputsampweights-str []:
This file is relevant only when NonlinearRomPreprocessing.ConstructReducedMesh.Type = SamplingWeighting. If NonlinearRomPreprocessing.ConstructReducedMesh.UseInputSamplingSolution = True. this file must be specified and is used to specify the sample weights used for constructing the reduced mesh, corresponding to the sample nodes specified under InputSampleNodes, and should follow the same sequential ordering. It is formatted as follows: