rtx-cfd: OversetPisoSolver::momentum_residual — the background predictor's own staggered stencil (u_rhs/v_rhs, factored out of the predictor bit-identically) evaluated on every face of a NaN-masked field; solved faces read rounding, the active–fringe interface reads the composite's pressure level offset δ·h (cancels in the sum), prescribed fringe–fringe / fringe–hole faces read the stamping's momentum injection; hole ghosts (p, u, v) from a band widened three rows into the hole make every ring face evaluable; overset_cfd1 prints the buckets, the ring x-bands and δ at the settled state; pin: residual vanishes on the solved faces

Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01X2GmJXeQ2njUecEKiJZ1G2

crates/specialized/rtx-cfd/src/solvers/incompressible/mod.rs

@@ -53,13 +53,13 @@ pub use curvilinear::{
 };
 pub use embedded::{EmbeddedParameters, EmbeddedPisoSolver, EmbeddedResult, EmbeddedSolverState};
 pub use embedded_body::{
-    EmbeddedBody, EmbeddedMask, FaceKind, SurfaceForce, SurfaceSample, polygon_interface_velocity,
-    polygon_signed_distance,
+    polygon_interface_velocity, polygon_signed_distance, EmbeddedBody, EmbeddedMask, FaceKind,
+    SurfaceForce, SurfaceSample,
 };
 pub use flow_field::FlowField;
 pub use overset::{
-    CellClass, OverlapMap, OversetField, OversetParameters, OversetPisoSolver, OversetResult,
-    OversetSolverState,
+    CellClass, MomentumResidual, OverlapMap, OversetField, OversetParameters, OversetPisoSolver,
+    OversetResult, OversetSolverState, ResidualBucket,
 };
 pub use piso::{PisoParameters, PisoResult, PisoSolver};
 #[cfg(feature = "cuda")]