rtx-cfd legacy GPU tests: the two point-source Poisson tests expect the sign of ∇²φ = f

2026-09-16 07:36:07 -05:00
parent eba2f61ddf
commit 49ccebc863
2 changed files with 3 additions and 2 deletions
@@ -256,7 +256,8 @@ mod cuda_tests {

        // Solution should be non-zero in the source region
        let center_idx = (ny / 2) * nx + (nx / 2);
-        assert!(result[center_idx] > 0.01);
+        // ∇²φ = f with zero boundaries: a positive source makes a NEGATIVE bump.
+        assert!(result[center_idx] < -0.01);

        // Boundaries should remain zero (Dirichlet BC)
        assert_relative_eq!(result[0], 0.0, epsilon = TEST_TOLERANCE);