3 Commits

Include renames

Author	SHA1	Message	Date
Omar SobhandClaude Fable 5	9fe9d7f74a	rtx-cfd + rtx-fsi: ECSW campaign phase 1 — snapshot dump + FlowField save/load ... FlowField::save/load serialize the complete field state bit-exact (all twelve matrices including *_old, predictors and sources, so a load is a true restart state), with a roundtrip test asserting to_bits equality on every value and rejection of truncated/corrupt files. The march gains an ECSW snapshot knob (RTX_FSI{2,3}_SNAP path, SNAPEVERY, default off): every N committed steps it appends an FSNP record — t, full-DOF displacement/velocity/acceleration (what rtx_fea::mor's pod_basis/train_ecsw consume, plus what the phase-4 dynamic reduction will need) and the committed sparse nodal load for the offline full-vs-reduced replay. Reporting-only: reads committed state after acceptance, no float ops on the solver path. Verified: smoke run's FSNP parsed by an independent reader (570 DOFs, correct record count, physical values); FSI2 committed default digit-identical with the knob off. Co-Authored-By: Claude Fable 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01X2GmJXeQ2njUecEKiJZ1G2	2026-08-28 21:56:37 -05:00
Omar SobhandClaude Opus 5	10e5f9cb90	rtx-cfd: fix the cell-centre velocity interpolation, which was half a cell out ... `get_velocity_at` averaged u-faces `i - 1` and `i` to report the velocity at cell `i`. On this staggered layout `u` is `(ny, nx + 1)` and cell `i` is bounded by faces `i` and `i + 1` -- which is the convention `compute_mass_source` uses to form the divergence, and therefore the one that defines the grid. The two disagreed by one index. Consequences: every profile read through this function was shifted half a cell west of the field the solver actually computed, the first and last cells were special-cased to a single face, and the outermost face was never read at all. It is a diagnostic path rather than a solve path -- the residuals are byte-identical before and after -- but the cavity comparison against Ghia is taken through it, so the reported vortex position was affected. The corrected grid study, unchanged in the solve: n u_min y 17^2 -0.1257 0.4375 33^2 -0.1550 0.4688 65^2 -0.1743 0.4844 97^2 -0.1825 0.5000 Ghia -0.2109 0.4531 The shift matters most where the grid is coarse and washes out under refinement, which is what a half-cell offset should do. Found while establishing where each staggered variable physically sits, a prerequisite for applying the method of manufactured solutions to this solver. Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>	2026-08-19 12:10:41 -07:00
redclawsystems	4d88dc0584	Initial commit	2026-03-04 00:08:42 +00:00