physics.fluid.pipe_exit

• 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 STALE (1 capability; 163 remain CURRENT) @ 2026-09-17T23:16:16.380Z
• Semantic contract PASS
• Evidence attested at 2026-09-17T23:04:34.157Z
• Last production check 2026-09-17T23:04:34.157Z
• Public / cache PASS
• Origin PASS
• Supplemental domain review Not performed
• Named expert review Not performed

• release artifacts aligned PASS

Fingerprint sha256:8f6dfcd37227a4bffe2e89a4e1542f8b7c62da341ae08eec62d3e5aca24eafa2

Input schema sha256:f5ff205517941fe295fc8b8b592b7f88ca6fec912c6e86fbc18dec72b8c93b0a · Output schema sha256:67f6973f229bcefc3a4a0870756b6bca28713d64dc6d247b14a760048cf56e2a · 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

pipe-exit

Engine

pipe-exit

Engine build

2026-09-17

Evidence core

2026-09-17T21:37:57.118Z

Rendered

2026-09-17T23:36:55.415Z

Last reviewed

—

Assumptions

• Pipe exit into a large reservoir: h = K v² / (2g) with K=1; kinetic energy is dissipated; K is reported, not an input
• Default g=9.80665 m/s²; default ρ=1000 kg/m³; incompressible; one mean speed in the pipe; exit geometry does not change K
• Not catalog minor-loss K given, not pipe-entrance flush/reentrant/rounded, not sudden expansion (v1−v2)², not Darcy f, not Q=Av

Limitations

• Pipe exit into a large reservoir: h = K v² / (2g) with K=1; kinetic energy is dissipated; K is reported, not an input
• Default g=9.80665; default ρ=1000 for Δp; incompressible; one mean speed in the pipe; exit geometry does not change K
• Not catalog minor-loss K given, not pipe-entrance flush/reentrant/rounded, not sudden expansion (v1−v2)², not Darcy f, not Q=Av