physics.fluid.iso_orifice

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 2026-09-27.o2-o3.v3. Calculation version 1.0.0. CVP 1.0.0-proposed. 4/4 golden · 1/1 CVP boundary · 2/2 invalid · 1/1 property · 1/1 metamorphic · 8/8 O3 · 2/2 cross-interface · 6/6 CVP contract. digest 3dcf46a2b2a6. O2: ISO 5167-2 orifice Q=C E A2 √(2Δp/ρ), Reader–Harris/Gallagher C from β, Re_D, tapping vs a separate-module identity (≤2 ULP). Not tank C_d√(2gH), not given C_d, not ISA 1932, not venturi, not Q=Av, and not Darcy. ≤2 ULP vs O3 applies only to the published tabulated ISO-orifice vectors. Not tank C_d, not given C_d, not ISA 1932, not venturi, and not Q=Av.

• Golden (oracle-backed) 4 / 4
• CVP boundary 1 / 1
• Invalid input 2 / 2
• 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 Q = C E A2 √(2Δp/ρ) with Reader–Harris/Gallagher C from β, Re_D, tapping; plus pressure and coefficient solves; + O3 mpmath tabulated discharge.
• Assurance Engineering
• Deferred Not tank C_d√(2gH), not given C_d, not ISA 1932, not venturi, not Q=Av, not Darcy, not D-D/2, not compressible ε.

• 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 sha256:896b2a670548bb36457bcb05d486e845e37d55e5f855be31c43faab028a200ee

Input schema sha256:c9462a4c1c1376534bbaf2cdbd8f8ec817236e1cd273f3ca8fa15ce7de8d8b74 · Output schema sha256:dacf3ff824d8880071f305497bb66908c4a2ab53df0e3ee608c512df9dab4336 · 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

iso-orifice

Engine

iso-orifice

Engine build

2026-09-24

Evidence core

2026-09-24T02:12:38.088Z

Rendered

2026-11-10T05:18:41.966Z

Last reviewed

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Assumptions

• ISO 5167-2 orifice plate: Q = C E A2 √(2Δp/ρ); Reader–Harris/Gallagher C from β, Re_D, and tapping; incompressible ε=1; C is reported, not an input
• Corner tappings default (L1=L2′=0); flange L1=L2′=25.4 mm/D; β∈[0.10,0.75]; D∈[50 mm,1000 mm]; d≥12.5 mm; Re_D≥5000 (β≤0.56) or 16000 β² (β>0.56)
• Not tank orifice C_d A √(2gH), not given C_d=0.61, not ISA 1932 nozzle, not venturi C_d=0.98, not Q=Av, not Darcy f, not D-D/2 tappings, not compressible ε

Limitations

• ISO 5167-2 orifice plate: Q = C E A2 √(2Δp/ρ); Reader–Harris/Gallagher C from β, Re_D, and tapping; incompressible ε=1; C is reported, not an input
• Corner tappings default (L1=L2′=0); flange L1=L2′=25.4 mm/D; β∈[0.10,0.75]; D∈[50 mm,1000 mm]; d≥12.5 mm; Re_D≥5000 (β≤0.56) or 16000 β² (β>0.56)
• Not tank orifice C_d A √(2gH), not given C_d=0.61, not ISA 1932 nozzle, not venturi C_d=0.98, not Q=Av, not Darcy f, not D-D/2 tappings, not compressible ε