physics.fluid.pipe_period

• Golden tests 2 / 2
• Boundary tests 10 / 10
• 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) @ 2026-09-17T13:12:27.589Z
• Semantic contract PASS
• Evidence attested at 2026-09-17T13:12:26.751Z
• Last production check 2026-09-17T13:12:26.751Z
• 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 sha256:5caa9d568ab44761d7d2fc17815fe60a4359cac980c5881ffe6b64d22ab80e1b

Input schema sha256:05e862ab69bd0cb053abfca638facaeb7ab4364ecbe8f338e41661f730c84f84 · Output schema sha256:b2002570db2389a561efde18dfc6f856fd07b2b76bd4d8f5e1c0c691decb5f77 · 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-period

Engine

pipe-period

Engine build

2026-09-17

Evidence core

2026-09-17T10:03:09.659Z

Rendered

2026-09-17T12:57:09.948Z

Last reviewed

—

Assumptions

• Pipe period T = 2L/c; c is a given celerity, not Korteweg–Hall from K, D, e, E
• Sudden-closure Joukowsky applies when valve time t < T; this page computes T, not Δp
• Not Joukowsky Δp=ρcΔv, not Darcy f, not minor-loss K, not Q=Av

Limitations

• Pipe period T = 2L/c; c is a given celerity, not Korteweg–Hall from K, D, e, E
• Sudden-closure Joukowsky applies when valve time t < T; this page computes T, not Δp
• Not Joukowsky Δp=ρcΔv, not Darcy f, not minor-loss K, not Q=Av