overset mesh: the flat-tip outline (P5-3 option B) — cylinder_flag_outline_deformed_tip / cylinder_flag_patch_deformed{,_from}_tip take the tip's corner radius (t = the recorded semicircle, bit for bit; smaller = the benchmark's flat face between corner arcs sampled at the wall spacing, point count fixed across the deformation, the tip's corners kept off the hull source); pins: corner t reproduces the recorded outline, the 2.5 mm outline has the exact area excess with no collapsed spacing, the O-grid builds straight and at ± 80 mm cold and warm at ny 41/62; harness knob RTX_FSI2O_TIP_CORNER (default 0.01) on the cold and warm builds, printed in both headers; pinned-toolchain fmt on touched crates

Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01LzcjQX7tvgn87CQCyg9Cfr

crates/specialized/rtx-cfd/tests/overset_energy_pin.rs

@@ -134,7 +134,8 @@ async fn pitching_flag_in_still_fluid_extracts_energy_at_every_h() -> CfdResult<
     let dt = period / steps_per_period as f64;
     println!(
         "  ENERGY PIN ny = {ny} (h {h:.4}, nx {nx}, patch ns {} nn {}, inner edge {hs:.4}): tip ± {tip_amp} m at {f} Hz (θ0 {theta0:.4} rad), dt {dt:.3e} ({steps_per_period} per period), {periods} periods",
-        base.ns(), base.nn()
+        base.ns(),
+        base.nn()
     );
     let start = std::time::Instant::now();
     let mut per_period: Vec<(f64, f64, f64)> = Vec::new(); // (work, +part, −part)
@@ -215,7 +216,11 @@ async fn pitching_flag_in_still_fluid_extracts_energy_at_every_h() -> CfdResult<
     let last = per_period.last().copied().unwrap_or((f64::NAN, 0.0, 0.0));
     println!(
         "  ENERGY PIN ny = {ny}: last-period net work {:+.4e} J/m (gross +{:.3e} / {:+.3e}); added inertia {inertia:.4e} kg·m²/m, rotational damping {damping:.4e} N·m·s/m; {} steps in {:.0} s",
-        last.0, last.1, last.2, periods * steps_per_period, start.elapsed().as_secs_f64()
+        last.0,
+        last.1,
+        last.2,
+        periods * steps_per_period,
+        start.elapsed().as_secs_f64()
     );
     assert!(last.0.is_finite(), "non-finite work");
     Ok(())