P5-3 instruments: per-region wall loads on saved instants (top / bottom / tip arc / fillets+cylinder — drag, lift, normal-traction mean/min/max; RTX_FSI2O_AUDIT_FACES, RTX_FSI2O_AUDIT_ONLY) and the patch-thickness knobs (RTX_FSI2O_PATCH_OFFSET / _PATCH_ROWS, RTX_OVERSET_PATCH_OFFSET / _PATCH_ROWS; save tags carry the offset) — the overlap band sat at a fixed number of cells (6 h) and moved inward in metres with refinement

Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_0116sg1Qz1gMv9hdcKP1XUam

crates/specialized/rtx-fsi/tests/turek_hron_fsi2_overset.rs

@@ -44,7 +44,17 @@ fn fsi2_overset_audit_of_saved_instants() {
         })
         .collect();
     dirs.sort();
+    // `RTX_FSI2O_AUDIT_ONLY=a,b,c`: only the named instants.
+    let only: Option<Vec<String>> = std::env::var("RTX_FSI2O_AUDIT_ONLY")
+        .ok()
+        .map(|v| v.split(',').map(|s| s.trim().to_string()).collect());
     for d in dirs {
+        if let Some(only) = &only {
+            let name = d.file_name().unwrap().to_string_lossy().to_string();
+            if !only.iter().any(|o| name.contains(o.as_str())) {
+                continue;
+            }
+        }
         let (fluid, dvec, t) =
             fsi2_harness::overset::OversetFluid::from_instant(case, ny, flag_nx, &d)
                 .expect("instant");
@@ -54,6 +64,19 @@ fn fsi2_overset_audit_of_saved_instants() {
             d.file_name().unwrap().to_string_lossy(),
             fluid.chain_line()
         );
+        // `RTX_FSI2O_AUDIT_FACES=1`: the wall load by region (P5-3).
+        if std::env::var("RTX_FSI2O_AUDIT_FACES").is_ok() {
+            let (regions, level) = fluid.wall_regions(&dvec);
+            let uy_tip = dvec[2 * fluid.interface.tip[fluid.interface.tip.len() / 2] + 1];
+            let mut line =
+                format!("  REGIONS t = {t:.4} tip uy {uy_tip:+.4}: p level {level:+.1} Pa |");
+            for (name, n, len, fx, fy, tn_mean, tn_min, tn_max) in regions {
+                line += &format!(
+                    " {name}: {n} faces {len:.3} m, drag {fx:+.1}, lift {fy:+.1}, t_n mean {tn_mean:+.0} [{tn_min:+.0}, {tn_max:+.0}] Pa |"
+                );
+            }
+            println!("{line}");
+        }
     }
 }