embedded3 S2-7b: the curved-wall instrument (tests/embedded3_wall_position_curved.rs: Taylor–Couette between embedded cylinders, rigid-rotation linear mode, outer-driven mode; walls' effective radii, pressure error by cell class against the exact p(r), wall-flux and ghost diagnostics); the sphere operator probe's sub-bands and force units; two host prototypes, default off, device refuses them: RTX_E3_WALL_EXCHANGE=axisfoot (the axis exchange takes the wall velocity at the axis foot — the S2-7 default read the solid face's own value, exact only for a uniform wall velocity: rigid rotation A 1.012 → 1.003) and RTX_E3_CONV_SIDES=exact (convective mass fluxes from the sides' own apertures; moves nothing)

Co-Authored-By: Claude Fable 5.1 <[email protected]>

crates/specialized/rtx-cfd/src/solvers/incompressible/embedded3/wall.rs

@@ -114,6 +114,10 @@ pub struct Mask {
     /// S2-7: the quadratic wall gradient's second point at the neighbour's
     /// own centroid distance (host prototype).
     pub(super) wall_order2_centroid: bool,
+    /// S2-7b host prototypes: the axis foot's wall velocity in the solid
+    /// exchange; the convective sides from the sides' own apertures.
+    pub(super) wall_exchange_foot: bool,
+    pub(super) conv_sides_exact: bool,
     /// The centroid prototype's pressure-gradient weights per u / v / w face.
     /// The centroid-distance cross diffusion (S2-5).
     pub(super) diffusion_centroid: bool,
@@ -542,6 +546,8 @@ impl Mask {
             wall_exchange_axis: false,
             cv_sides_exact: false,
             wall_order2_centroid: false,
+            wall_exchange_foot: false,
+            conv_sides_exact: false,
             grad_weights: None,
             diffusion_centroid: false,
             face_shifts: None,