| name | aero-qa-stretch-solvers |
| description | QA checklist for the TACS and SU2 stretch cross-checks in open-air. Use when editing or reviewing src/openair/structures/tacs_backend.py, _tacs_static.py, src/openair/validation/su2_backend.py, tacs.json, su2.json, or Gmsh meshing. |
Stretch solver QA (TACS, SU2, Gmsh/meshio)
Read docs/guidebook/05-tacs.md, 06-gmsh-meshio.md, 07-su2.md; execute
their "Check your work" lists.
Non-negotiables for this repo:
- Stretch results are calibration data, never design evidence. They cannot
pass or fail a prototype; they can only flag model disagreement.
- TACS: check
analysis.backend == "tacs" (else the analytic fallback ran);
KS failure < 1 means margin; hand-check shell mass = area × t × rho.
Runs inside micromamba env tacs (MAMBA_ROOT_PREFIX=tools/mamba).
- SU2:
ok means ran+parsed; converged (rms density drop) is the
separate verdict — never conflate them. CFD Mach is floored at 0.30
(compressible Euler is stiff below); the JSON records requested vs CFD
Mach. Prebuilt 8.5 accepts only MESH_FORMAT= SU2|CGNS; MUSCL_FLOW= NO
with JST.
- Gmsh meshes must carry physical groups for every boundary; verify marker
element counts cover the boundary before blaming a solver.
