The following sections of this chapter are:
solnEdit is a tool that enables operations on a solution
file.
Operations range from:
Imposition of a constant value on a datafield, or a part of a datafield.
Imposition of an analytic value on a datafield.
Modification of solution header information.
Conversion of solution files from non-SI unit systems.
Combination of datafields for postprocessing operations.
Note: Advanced edition of an INPUT solution file is not a supported feature of FENSAP-ICE. A modified solution file might affect the solver convergence and the physical accuracy of your computations. This command should only be used for postprocessing or data analysis purposes.
Note:
- solnEdit -h
For a complete, and fully up-to-date command reference description, use the built-in command line help with the above script.
Table 15.33: solnEdit
| solnEdit GRID INPUT OUTPUT [options] |
The solution file INPUT and its related grid are read, and the file OUTPUT is written. |
| -l |
Printout the content of the solution file, the OUTPUT argument can be omitted. |
| -c3d |
Input grid is a C3D solid grid. |
Table 15.34: Options
| FIELDNAME=EXPRESSION |
The content of the named field will be replaced by the expression value. Expressions are Maple-like. Use enclosing quotes around EXPRESSION if spaces are used in the expression. For example "XVEL=Z^2" Available variables are: the 4-letter solution field names, X, Y, Z, NN (node ID), MAT (material ID). |
|
FIELDNAME:#=EXPRESSION |
For unsteady fields, # permits to select the time level to change. |
| "PRES:2=sqrt(X*X+Y*Y)*1000 + 101325" FIELDNAME@BC=EXPRESSION |
Specify a boundary condition where the values are applied. When no boundary condition is specified, the value is applied to the whole datafield, internally too. Multiple boundary conditions and a no-boundary condition expression can be specified simultaneously. |
| FIELDNAME=@FILENAME@FIELD |
The entire content of FIELDNAME will be replaced by the content from the source solution file. The source solution must be from a grid with the same number of nodes, however the file format and available fields may differ. |
| -convertToMetricFrom=[ft/s,in/s,mph,m] [,[psi,psf,Pa,kPa,lbm/ins2], [R,F,C,K], [kg/m3,lb/in3,lb/ft3]] |
This converts the solution for velocity, pressure, temperature, density using the specified units. |
Example 15.3: Print the Content of a Solution File
... |
Example 15.4: Modify the Content of a Datafield
| solnEdit grid soln soln_out TEMP=288 |
Assigns a constant value. |
Example 15.5: Modify the Content of a Datafield on a Specific Boundary Condition
| solnEdit grid soln soln_out TEMP@2000=288 |
Assigns a constant value on wall 2000. |
Example 15.6: Set up Material-Specific Values (Two Possible Syntaxes)
| solnEdit grid soln soln_out "TEMP=ifValue(MAT==1,288,270)" |
Syntax 1 |
| solnEdit grid soln soln_out "TEMP=(MAT==1)*288+(MAT==0)*270" |
Syntax 2 |
See Expression Syntax for more details regarding the available expression operators.
The soln2soln command interpolates a solution file from one
grid to another. The grids can be node-matching or non-node-matching.
If the grids are exactly node-matching, no interpolation will be required, the
solution will simply be copied from one grid to the other. This is useful if a
solution must be copied onto a grid that has been reordered. Use the
-nodes option for this specific mode.
If the grids are not node-matching, each target node will be interpolated in 3D in the source grid cells. If the node lies outside of the original grid volume, the value at the closest surface projection is used. This feature must be used with caution.
Note: Wall nodes have a special treatment. For some datafields (temperature,
pressure, velocity, heat flux, forces, beta), their value will be projected
to the closest wall of the target grid. Use the -raw
option to disable this behavior.
If the source grid is curvilinear two-dimensional (such as ICE3D output
grid files), it is suggested to use the -flat
option.
- soln2soln GRID1 SOLN1 GRID2 SOLN_OUT [options]
This command interpolates solution1 values from grid1 to grid 2 and writes SOLN_OUT.soln.
Note: For FENSAP/DROP3D solution files, it interpolates wall-based hflux/shear/beta on surfaces only.
Table 15.35: Options
| -raw |
Disable any automatic behavior (wall only, slip/noslip). |
| -flat |
Use with map.grid/ice.grid source (GRID1) files. |
| -nodes |
Use with reordered grids or grids same nodes coordinates, no interpolation is done, interpolation is a closest-node search. |
| -walls |
Interpolate all points from the nearest WALL boundary condition of the input grid. |
| -perbc |
Values are computed on boundaries only and closest-surface/point search is done on the matching boundary condition in the other grid. The two grids must share same boundary condition identifiers. |
Table 15.36: Optimizations
| -outbc |
Values computed on the target boundaries only (internal nodes = 0). |
| -threads=N |
Execute the interpolation using multiple CPU cores. |
Table 15.37: Interpolating Solutions
| soln2soln grid_orig soln grid_reordered soln_ordered -nodes |
Interpolate solution of a reordered grid (different node ordering). |
| soln2soln grid1 soln grid2 soln.2 -threads=4 |
Interpolate solution between two different grids of same general geometry (Interpolation using multi-cores is much faster). |
Table 15.38: Interpolating swimsol Files and 3D Airflow Wall Values
| soln2soln map.grid swimsol grid_3d swimsol.3d -flat |
Interpolate a swimsol file onto the 3D airflow grid. |
| soln2soln grid_3d soln map.grid soln.map -walls |
Interpolate 3D airflow wall values onto a 2D flat grid. |