physics.fluid.orifice

Three distinct suites: educational examples on the calculator page, this legacy regression count (15/15 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 2026-09-26.o2-o3. Calculation version 1.0.0. CVP 1.0.0-proposed. 4/4 golden · 9/9 CVP boundary · 9/9 invalid · 1/1 property · 1/1 metamorphic · 8/8 O3 · 2/2 cross-interface · 5/5 CVP contract. digest 11fb832151f4. O2: orifice vs a separate-module identity (≤2 ULP). Not weir L, not Manning n, not Darcy f, and not Q=Av. ≤2 ULP vs O3 applies only to the published tabulated orifice vectors. Not weir L, not Manning n, not Darcy f, and not Q=Av.

• Golden (oracle-backed) 4 / 4
• CVP boundary 9 / 9
• Invalid input 9 / 9
• Property 1 / 1
• Metamorphic 1 / 1
• O3 high-precision 8 / 8
• Cross-interface 2 / 2
• CVP contract 5 / 5
• 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 Tank orifice Q = Cd A √(2 g H) and meter orifice Q = Cd E A √(2 Δp/ρ), + O3 mpmath tabulated Q.
• Assurance Engineering
• Deferred Not weir L, not Manning n, not Darcy f, and not Q=Av.

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

Fingerprint sha256:f247c55047c820d3ed072ec9243224d8c3aa5d5af4a66f94801978344266e2e6

Input schema sha256:d8551d05b48e99a9d3b08efe16cb0d7e572b0ed5732c51bf4354fb167d7b9803 · Output schema sha256:311b9a157e98906228f1cb054519fb02a8930d12413e1aab86cc1ed23351eb8b · 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

orifice-discharge

Engine

orifice-discharge

Engine build

2026-09-18

Evidence core

2026-09-18T03:05:43.139Z

Rendered

2026-11-10T05:18:41.921Z

Last reviewed

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Assumptions

• Sharp-edged orifice; SI; default C_d=0.61; C_d in (0, 1]
• Tank: Q=C_d A √(2gH); not a weir H^{3/2}
• Meter: Q=C_d E A_t √(2Δp/ρ), E=1/√(1−β⁴); incompressible; user C_d
• Not weir, not Q=Av, not Darcy, not Manning, not compressible ISO ε(Re)

Limitations

• Sharp-edged orifice; SI; default C_d=0.61
• Tank: Q=C_d A √(2gH); not a weir H^{3/2}
• Meter: Q=C_d E A_t √(2Δp/ρ); incompressible; user C_d; not ISO ε(Re)
• Not weir, not Q=Av, not Darcy, not Manning