DeviceSdf gains `tip_corner: Option<f64>` (None = the capsule, as before;
Some(r_c) = a FLAT tip through the centreline's last point, normal to the
last segment, corners rounded to r_c): the last segment becomes a ray for
the lateral distance and the strip is cut by the tip plane with the span
cut's rounded intersection. Host twin (plate.rs: closest/tip_axial/
flat_cap, polyline and plate bodies) and the device φ and velocity
(e3_geom.cu geom_phi_at / body_velocity / plate_dist; GeomSdf flat_tip +
tip_corner) expression for expression.
Knobs: flag test RTX_E3_FLAG_TIP=flat + RTX_E3_FLAG_TIP_CORNER (default
0.00125 m; the tip inset defaults to 0 with the flat tip; the host φ is
the device form's); R8-a harness RTX_E3FSI_TIP=flat + RTX_E3FSI_TIP_CORNER
(the centreline gains node A as a 36th station).
New host test embedded3_flat_tip (G2 geometry: tip plane at the last
point, r_c = half = the capsule pulled back by half to 4e-17, cut volume
and wall area vs the analytic rounded rectangle at ny 62/124/248).
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
e3_loads.cu evaluates every summand of Mask::cut_wall_force (cells' p W,
fluid faces' implicit wall shear) and cut_wall_exchange_parts (diffusive and
convective exchange with prescribed neighbours) on the device from the
predictor set of the device mask, in the host's expression order with FMA
off; the summands are appended as records, downloaded once per pass, sorted
into the host's loop order and summed sequentially on the host, so the
totals are the host route's to the bit. Records replay into the R8-a load
sink (exact zeros dropped; sum-invariant) and into R8-c's WallLoad shape.
DeviceStep::cut_wall_loads_device / cut_wall_force_device /
check_wall_loads (the G1 instrument, RTX_E3_LOADS_CHECK=1 in the flag test).
The flag test and the R8-a harness take the device route under the knob;
default paths untouched. cut.rs: E3CutPtrs and DeviceCut::ptrs pub(super).
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
- embedded3 DeviceStep::snapshot/restore (step/device/snapshot.rs): the start-of-step
device fields + the moving body's host records; a restore rebuilds the R6 persistent
geometry/classification, the predictor tables, the hierarchy and the guess basis.
Only called by the new harness (existing paths untouched).
- exchange::set_load_sink: every contribution of the operator load route (p W, wall
shear, diffusive/convective exchange) with position/component/part; None by default,
the routes' sums unchanged (slab ny 62 CSV byte-identical to r6_1/base_slab62.csv).
- rtx-fsi feature cuda (= rtx-cfd/cuda) and tests/fsi2_embedded3.rs: the 2D rtx-fea flag
(35x2 Quad8, TL, Newmark 0.7) drives the capsule's centreline per coupled step; the
route's contributions are distributed onto the wetted nodes per unit span; Aitken
subiterations each re-run the fluid step from the snapshot.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
