physics.thermo.composite_wall

• Golden tests 1 / 1
• Boundary tests 8 / 8
• Property tests 5 / 5
• Production surface contract 4 / 4
}
• 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) @ 2026-09-17T03:09:03.307Z
• Semantic contract PASS
• Evidence attested at 2026-09-17T03:09:02.494Z
• Last production check 2026-09-17T03:09:02.494Z
• 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
• schema rejects incomplete input PASS

Fingerprint sha256:7832177001854ed16e851ba103e5917f90bfcec7dbc24861b6ecfe5911e008d3

Input schema sha256:5047588b25f9c00388cc4d53cd92168749c055d21833c428a8ae48d4a92143a4 · Output schema sha256:c6d08b24bee10c6ea8371bf251adccc275d7ba81b306c9a374d5a5a0de5f6666 · 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

composite-wall

Engine

composite-wall

Engine build

2026-09-17

Evidence core

2026-09-17T02:06:15.504Z

Rendered

2026-09-17T02:45:35.820Z

Last reviewed

—

Assumptions

• Plane composite wall; 1-D; shared A; R_i = L_i/(k_i A)
• Optional films R = 1/(h A); series only; Q=ΔT/R
• Not Fourier/Newton Q pages
• Not lumped R-network, not heatsink θ, not steam, not cylindrical

Limitations

• Plane wall; 1-D; shared A; SI K/W
• R_i = L_i/(k_i A); optional films 1/(h A); Q=ΔT/R when ΔT is given
• Not Fourier/Newton Q (see /calc/physics/heat-transfer)
• Not lumped R-network (see /calc/physics/thermal-resistance)
• Not heatsink θJC/θSA, not steam, not cylindrical