physics.fluid.cavitation

Three distinct suites: educational examples on the calculator page, this legacy regression count (17/17 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.iface. Calculation version 1.0.0. CVP 1.0.0-proposed. 4/4 golden · 10/10 CVP boundary · 11/11 invalid · 1/1 property · 1/1 metamorphic · 8/8 O3 · 2/2 cross-interface · 5/5 CVP contract. digest 8194cd4f6e6f. O2: σ=(p−p_v)/(½ ρ v²) vs a separate-module identity (≤2 ULP). Not NPSH, not Thoma, not Weber, and not Euler Eu=Δp/(ρ v²). ≤2 ULP vs O3 applies only to the published tabulated cavitation vectors. Not NPSH, not Thoma, not Weber, and not Euler.

• Golden (oracle-backed) 4 / 4
• CVP boundary 10 / 10
• Invalid input 11 / 11
• 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 σ = (p − p_v)/(½ ρ v²) with pressure, vapor, and velocity solves; + O3 mpmath tabulated σ.
• Assurance Engineering
• Deferred Not NPSH, not Thoma σ_Th=NPSH/H, not Weber, and not Euler Eu=Δp/(ρ v²).

• 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:e3a671d157787e92a9fd358d26c296bd4973b85bb67f82eee6af140f281bd7b5

Input schema sha256:795dfff7a79de93cdcd92535f6e6e8f07209e56ed5c2831270aa10f8f8ca175c · Output schema sha256:d479c5fa0300f2187cb9e7753be40e05cba41ee98001875e9659d2cc1f2a611d · 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

cavitation-number

Engine

cavitation-number

Engine build

2026-09-17

Evidence core

2026-09-17T10:13:14.968Z

Rendered

2026-11-10T05:18:41.950Z

Last reviewed

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Assumptions

• Cavitation number σ = (p − p_v) / (½ ρ v²); default ρ=1000 kg/m³; p and p_v absolute Pa
• Not NPSH head, not Thoma σ_Th=NPSH/H, not Weber We=ρv²L/σ, not Euler Eu=Δp/(ρ v²)
• Not Reynolds, not capillary Ca=μv/σ, not Q=Av

Limitations

• Cavitation number σ = (p − p_v) / (½ ρ v²); default ρ=1000 kg/m³; p and p_v absolute Pa
• Not NPSH head, not Thoma σ_Th=NPSH/H, not Weber We=ρv²L/σ, not Euler Eu=Δp/(ρ v²)
• Not Reynolds, not capillary Ca=μv/σ, not Q=Av