physics.thermo.composite_wall

Three distinct suites: educational examples on the calculator page, this legacy regression count (14/14 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 2026-09-25.o2-o3. Calculation version 1.0.0. CVP 1.0.0-proposed. 3/3 golden · 7/7 CVP boundary · 7/7 invalid · 1/1 property · 1/1 metamorphic · 8/8 O3 · 2/2 cross-interface · 6/6 CVP contract. digest d63c309b6b4c. O2: plane composite wall vs a separate-module identity (≤2 ULP). Not a lumped R-network and not cylindrical. ≤2 ULP vs O3 applies only to the published tabulated composite-wall vectors. Not radiation and not a heatsink.

• Golden (oracle-backed) 3 / 3
• CVP boundary 7 / 7
• Invalid input 7 / 7
• Property 1 / 1
• Metamorphic 1 / 1
• O3 high-precision 8 / 8
• Cross-interface 2 / 2
• CVP contract 6 / 6
• 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 Plane wall R = Σ L_i/(k_i A), optional films 1/(h A), optional Q = ΔT/R, + O3 mpmath tabulated resistance.
• Assurance Engineering
• Deferred Not a lumped R-network, not cylindrical, and not radiation.

• release artifacts aligned PASS
• schema output required declared PASS
• schema valid input executes PASS
• engine success output validates schema PASS
• schema rejects incomplete input PASS
• rest success payload validates schema 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

2026-11-10T05:18:42.005Z

Last reviewed

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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