physics.fluid.drowned_sluice

Three distinct suites: educational examples on the calculator page, this legacy regression count (6/6 golden + boundary), and the CVP verification suite below. They are not the same number. Property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the CVP Manifest . SKIP (0/0) means that suite has no published vectors.

This calculator CURRENT · Public schema 1.0.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Verification revision 2026-10-28.meta-metrics-v2. Calculation version 1.0.0. CVP 1.0.0-proposed. 4/4 golden · 1/1 CVP boundary · 3/3 invalid · 1/1 property · 1/1 metamorphic · 8/8 O3 · 2/2 cross-interface · 6/6 CVP contract. digest a41bb6181fd2. O2: Swamee drowned undershot sluice vs a separate-module identity (≤2 ULP). Not free-flow sluice without y2, not Villemonte H1/H2, not orifice Cd/A, not Manning, and not Q=Av. ≤2 ULP vs O3 applies only to the published tabulated drowned-sluice vectors. Not free-flow without y2, not Villemonte H1/H2, not orifice, not Manning, and not Q=Av.

• Golden (oracle-backed) 4 / 4
• CVP boundary 1 / 1
• Invalid input 3 / 3
• Property 1 / 1
• Metamorphic 1 / 1
• O3 high-precision 8 / 8
• Cross-interface 2 / 2
• CVP contract 6 / 6
• Interfaces PASS · UI (SSR) / REST / MCP
• Interface claim ui-ssr is query-result HTML, not a live browser session. Error-path engine·REST·MCP 1/1 (status, code, calculation_version). SSR compared on URL-canonical requested calculations; empty query is idle (not an error) and JSON-typed object/array inputs are REST/MCP-only.
• Verified scope Swamee 1992 drowned undershot sluice Q=C_d a b √(2g y1) with θ from y1,y2,a, + O3 mpmath tabulated Q.
• Assurance Engineering
• Deferred Not free-flow sluice without y2, not Villemonte H1/H2, not orifice Cd/A, not Manning, not Q=Av.

• release artifacts aligned PASS
• schema output required declared PASS
• schema valid input executes PASS
• engine success output validates schema PASS
• schema rejects incomplete input PASS
• rest success payload validates schema PASS

Fingerprint sha256:ae94ff3816fd45ba49f973684d53400d605c4dd4827cfda9455c78155fc4c698

Input schema sha256:d496dff247db16ed9c0eb601dd7c693b0b1d7fe92911fe8a0f9b5d40f313dfbc · Output schema sha256:84f6a9167e96b6c4f9ee1c068a260f637fd4adf641662a9b763048af4c2744c6 · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Tool

drowned-sluice

Engine

drowned-sluice

Engine build

2026-09-24

Evidence core

2026-09-24T02:12:38.088Z

Rendered

2026-11-10T05:18:41.982Z

Last reviewed

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Assumptions

• Drowned undershot sluice; y2 required
• SI g=9.80665 unless given
• Swamee 1992 θ and (y1+15a) form; C_d is reported
• Drowned when y1 < 0.81 y2 (y2/a)^{0.72}
• Not free-flow sluice, not Villemonte weir, not orifice, not Manning, not Q=Av

Limitations

• Swamee 1992 drowned undershot sluice: Q=C_d a b √(2g y1); C_d=θ·0.611[(y1−a)/(y1+15a)]^{0.072}; θ from y1, y2, a; C_d is reported
• Requires y2; drowned when y1 < 0.81 y2 (y2/a)^{0.72}; a/y1∈[0.05, 0.65]; y1>y2>a; SI
• Not free-flow sluice without y2, not Villemonte H1+H2 weir, not tank orifice C_d A √(2gH), not Manning n, not Q=Av