physics.fluid.orifice

• Golden tests 1 / 1
• Boundary tests 9 / 9
• Property tests 5 / 5
• Production surface contract 3 / 3
}
• Engine tested Yes
• Source checked Yes
• Artifact integrity PASS
• Production attestation Embedded snapshot: STALE · Last attested schema matched 1.0.0 snapshot / local build · Semantic contract ✓ · Last attestation PASS · current evidence changed · re-attestation required · Public/cache ✓ · Origin ✓ · Live production status PASS (0 stale; 163 CURRENT) @ 2026-09-17T03:09:03.307Z
• Semantic contract PASS
• Evidence attested at 2026-09-17T03:09:02.494Z
• Last production check 2026-09-17T03:09:02.494Z
• Public / cache PASS
• Origin PASS
• Supplemental domain review Not performed
• Named expert review Not performed

• release artifacts aligned PASS
• schema valid input executes PASS
• engine success output 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

2026-09-17

Evidence core

2026-09-17T02:24:48.610Z

Rendered

2026-09-17T02:45:35.818Z

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