physics.fluid.iso_cone

• Golden tests 0 / 0
• Boundary tests 0 / 0
• Property tests 5 / 5
• Production surface contract 1 / 1
}
• 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; 164 CURRENT) @ 2026-09-18T10:48:34.503Z
• Semantic contract PASS
• Evidence attested at 2026-09-18T10:48:33.674Z
• Last production check 2026-09-18T10:48:33.674Z
• Public / cache PASS
• Origin PASS
• Supplemental domain review Not performed
• Named expert review Not performed

• release artifacts aligned PASS

Fingerprint sha256:cdc430ba78feb55914fc82b3779cd961f31b442d6322e202838dd30b5b70d345

Input schema sha256:f933057dc721f24c1340de3ad2c9ee8be6772873925c2af6c30096e94a655112 · Output schema sha256:2baab959a4f222e1ebdb6bea7d0c2a3132caa0a5a038421985dad58feb9d9d5a · 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-cone

Engine

iso-cone

Engine build

2026-09-18

Evidence core

2026-09-18T09:33:38.389Z

Rendered

2026-09-18T11:10:25.555Z

Last reviewed

—

Assumptions

• ISO 5167-5 uncalibrated cone: Q = C E A √(2Δp/ρ); C=0.82; β=√(1−(d_c/D)²); A=(π/4) D² β²; incompressible ε=1; C is reported, not an input
• Re_D∈[8e4, 1.2e7] is the ISO envelope; β∈[0.45,0.75]; D∈[50 mm, 500 mm]; relative uncertainty of uncalibrated C is 5%
• Not ISA 1932 C(β,Re), not RHG orifice, not ISO 5167-4 type C, not long-radius C(β), not given C_d, not Q=Av, not Darcy f, not compressible ε

Limitations

• ISO 5167-5 uncalibrated cone: Q = C E A √(2Δp/ρ); C=0.82; β=√(1−(d_c/D)²); A=(π/4) D² β² annulus; incompressible ε=1; C is reported, not an input
• Uncalibrated C=0.82; Re_D∈[8e4, 1.2e7] is the ISO envelope; β∈[0.45,0.75]; D∈[50 mm, 500 mm]; larger cone lowers β
• Not ISA 1932 C(β,Re), not RHG orifice, not ISO 5167-4 type C, not long-radius C(β), not given C_d, not Q=Av, not Darcy f, not compressible ε