Simulation controls¶
Commands of the simulation_controls chapter of the database, 6 entries. The status words are defined once, on the compatibility matrix, which says what each rests on and what the script builder does with it. Read it before this page: broken and removed are refusals, so a row here can be telling you the emitter will not write that command for that version.
SET_GEOMETRIC_EDGE_BLUNTNESS_ANGLE¶
Phase setup, layout inline. Manual: SRC-750 p.288.
Angle above which a geometric edge counts as blunt, from 45 to 179 degrees. First documented by the 26.122 edition, which is also the first to stop printing SET_TRAILING_EDGE_BLUNTNESS_ANGLE. The two take one angle in degrees and stand in the same place on the page, so this one is where a script porting forward moves. The name change is not cosmetic: the older one names the trailing edge and this one names a geometric edge, which is the wider thing, and no edition states whether the criterion changed with the name. The manual's stated range is not enforced here, because the database records grammar and the solver owns the range.
| Argument | Specification |
|---|---|
angle |
float [deg] |
| Version | Status | Evidence |
|---|---|---|
| 26.122 | documented | SRC-750 p.288, the first edition to document it |
| 26.123 | documented | SRC-751 p.288, unchanged from SRC-750 p.288 |
| 26.124 | documented | SRC-752 p.288, the SRC-751 file, carried from 26.123; not run on 26.124 |
SET_SIGNIFICANT_DIGITS¶
Phase setup, layout inline. Manual: SRC-003 p.284.
Output precision, integer between 1 and 8; applies to the values the solver writes into its exports.
| Argument | Specification |
|---|---|
digits |
int |
| Version | Status | Evidence |
|---|---|---|
| 25.000 | documented | SRC-749 p.254, same grammar as 26.120 |
| 25.100 | documented | SRC-748 p.274, same grammar as 26.120 |
| 26.000 | documented | SRC-747 p.273, same grammar as 26.120 |
| 26.100 | documented | SRC-741 p.278, same grammar as 26.120 |
| 26.101 | documented | SRC-725 p.283, same grammar as 26.120 |
| 26.120 | documented | SRC-003 p.284 |
| 26.121 | documented | SRC-740 p.287, same grammar as 26.120 |
| 26.123 | documented | SRC-751 p.288, unchanged from SRC-750 p.288 |
| 26.124 | documented | SRC-752 p.288, the SRC-751 file, carried from 26.123; not run on 26.124 |
SET_SIMULATION_LENGTH_UNITS¶
Phase setup, layout inline. Manual: SRC-003 p.284.
Selects the simulation length scale unit; geometry dimensions and length-typed command arguments are interpreted in this unit.
| Argument | Specification |
|---|---|
units |
enum in |
| Version | Status | Evidence |
|---|---|---|
| 25.000 | documented | SRC-749 p.254, same grammar as 26.120 |
| 25.100 | documented | SRC-748 p.274, same grammar as 26.120 |
| 26.000 | documented | SRC-747 p.273, same grammar as 26.120 |
| 26.100 | documented | SRC-741 p.278, same grammar as 26.120 |
| 26.101 | verified | reports/compat/CMP-26101_2026-08-08_full.yaml |
| 26.120 | verified | reports/compat/CMP-26120_2026-08-08_full.yaml |
| 26.121 | verified | reports/compat/CMP-26121_2026-08-08_full.yaml |
| 26.122 | verified | reports/compat/CMP-26122_2026-08-11_full.yaml |
| 26.123 | verified | reports/compat/CMP-26123_2026-08-17_full-sim.yaml; SRC-751 p.288, unchanged from SRC-750 p.288 |
| 26.124 | verified | reports/compat/CMP-26124_2026-09-14_full-sim.yaml; SRC-752 p.288, the SRC-751 file, carried from 26.123 |
SET_TRAILING_EDGE_BLUNTNESS_ANGLE¶
Phase setup, layout inline. Manual: SRC-003 p.284.
The other trailing-edge detection threshold: how blunt an edge may be and still count as a trailing edge. ITS RANGE DOES NOT START AT ZERO. The manual bounds it between 45 and 179 degrees, where the sweep angle above starts at 0, so the two thresholds on the same page are not interchangeable and a value valid for one may be outside the other's range. Neither bound is enforced.
| Argument | Specification |
|---|---|
angle |
float [deg] |
| Version | Status | Evidence |
|---|---|---|
| 25.000 | documented | SRC-749 p.255, same grammar as 26.120 |
| 25.100 | documented | SRC-748 p.274, same grammar as 26.120 |
| 26.000 | documented | SRC-747 p.273, same grammar as 26.120 |
| 26.100 | documented | SRC-741 p.278, same grammar as 26.120 |
| 26.101 | documented | SRC-725 p.283, same grammar as 26.120 |
| 26.120 | documented | SRC-003 p.284 |
| 26.121 | documented | SRC-740 p.287, same grammar as 26.120 |
| 26.122 | removed | SRC-750 pp.283-383, the scripting reference of the 26.122 edition, does not print this command anywhere, AND THAT EDITION'S INDEX DISAGREES WITH ITS OWN BODY: while its Script Index at pp.384-390 still names it and does not name SET_GEOMETRIC_EDGE_BLUNTNESS_ANGLE. The body is the reading recorded, on the rule that a script is written from a signature heading and an index entry only points at one, so an index lagging its own body is a defect of that document rather than a second opinion about the solver. The index is incomplete in BOTH directions and neither half of it carries much: counted over the ten commands this edition is the first to document, five are in it and five are not, and it keeps four of the seven names this edition stops printing relative to 26.120, plus at least one token that is no command at all, SOLVER_INITIALIZATION. Read the four with that scope: counted without it the kept names are five, DISABLE_ACTUATOR having left the body at 26.101 and stayed in the index. So the body wins here on the rule and not on any property of this index. A first draft of this note said the index was maintained by addition, which was one observation generalised and the count refutes it. The same edition is the first to print SET_GEOMETRIC_EDGE_BLUNTNESS_ANGLE, which takes one angle in degrees in the same place on the same page. Recorded as removed rather than left to inheritance for the reason given on SURFACE_ROTATE. The successor names a GEOMETRIC edge where this names a trailing edge, which is the wider thing, and no edition says whether the criterion moved with the name. No probe has asked the 26.122 solver whether it still answers this name.; Successor: SET_GEOMETRIC_EDGE_BLUNTNESS_ANGLE |
SET_TRAILING_EDGE_SWEEP_ANGLE¶
Phase setup, layout inline. Manual: SRC-003 p.284.
Threshold used by trailing-edge detection: how far an edge may sweep away from the reference direction and still be detected. The manual bounds it between 0 and 90 degrees; the bound is not enforced, which is this database's standing treatment of the manual's stated bounds. It configures AUTO_DETECT_TRAILING_EDGES and DETECT_TRAILING_EDGES_BY_SURFACE, so it has no effect unless one of them runs afterwards.
| Argument | Specification |
|---|---|
angle |
float [deg] |
| Version | Status | Evidence |
|---|---|---|
| 25.000 | documented | SRC-749 p.254, same grammar as 26.120 |
| 25.100 | documented | SRC-748 p.274, same grammar as 26.120 |
| 26.000 | documented | SRC-747 p.273, same grammar as 26.120 |
| 26.100 | documented | SRC-741 p.278, same grammar as 26.120 |
| 26.101 | documented | SRC-725 p.283, same grammar as 26.120 |
| 26.120 | documented | SRC-003 p.284 |
| 26.121 | documented | SRC-740 p.287, same grammar as 26.120 |
| 26.123 | documented | SRC-751 p.288, unchanged from SRC-750 p.288 |
| 26.124 | documented | SRC-752 p.288, the SRC-751 file, carried from 26.123; not run on 26.124 |
SET_VERTEX_MERGE_TOLERANCE¶
Phase setup, layout inline. Manual: SRC-003 p.284.
Distance below which two mesh vertices are treated as one, which is what closes the gaps of an imported surface. The manual states only that the value is not negative. IT IS A LENGTH AND THE SIMULATION LENGTH UNIT DECIDES WHAT IT MEANS. The manual's sample passes 1E-5, which is a reasonable tolerance in metres and a very large one in microns, so the same number does different things under SET_SIMULATION_LENGTH_UNITS. No edition mentions the interaction.
| Argument | Specification |
|---|---|
tolerance |
float [simulation length units] |
| Version | Status | Evidence |
|---|---|---|
| 25.000 | documented | SRC-749 p.254, same grammar as 26.120 |
| 25.100 | documented | SRC-748 p.274, same grammar as 26.120 |
| 26.000 | documented | SRC-747 p.273, same grammar as 26.120 |
| 26.100 | documented | SRC-741 p.278, same grammar as 26.120 |
| 26.101 | documented | SRC-725 p.283, same grammar as 26.120 |
| 26.120 | documented | SRC-003 p.284 |
| 26.121 | documented | SRC-740 p.287, same grammar as 26.120 |
| 26.123 | documented | SRC-751 p.288, unchanged from SRC-750 p.288 |
| 26.124 | documented | SRC-752 p.288, the SRC-751 file, carried from 26.123; not run on 26.124 |