# 📐 L2 Spec — RANS k-omega SST — Menter's two-eq turbulence model Mismatch-Only Spec
**ID:** `L2-177-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-177`](/artifact/l1/L1-177)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.48 · **Delta tier:** 5
> **⛓ On-chain block:** 41553969
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 32 – 2048 |
| W | px | 32 – 2048 |
| Z | — | 16 – 1024 |
| Snr db | dB | 0 – 40 |
| C omega error | — | 0.0 – 0.3 |
| Wall fn error | — | 0.0 – 0.3 |
| Blend fn error | — | 0.0 – 0.3 |
## 2. Tolerance (ε)
**Type:** `fn`
```
15.0 + 0.3*SNR_dB - 10.0*blend_fn_error - 10.0*C_omega_error - 10.0*wall_fn_error
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.48 |
| Delta tier | 5 |
## 4. Fingerprint
`85d3255ea543b49ba6e32bcd0ce89b7bda2ff0b99d8403b382a694e978d42ac4`
## 5. On-chain Registration
- **Chain hash:** `0x8e1ddd95653a7f95ebaec69a99acdf7f3e8b64b44f59e465e89d97beec449a8f`
- **Chain tx hash:** `0xde2597a76a5f22faa2aec239a643b614a1c65ad5c74d7400b6fb0eb3e969c454`
- **Chain block:** `41553969`
---
## File Mapping
This bundle consists of: `L2-177-001.md`, `L2-177-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-177-001.md` | Source of truth — edit this | Human or LLM |
| `L2-177-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |
**Prompt for your LLM after editing this Markdown:**
> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.
_This Markdown was auto-synthesized from the catalog row for `L2-177-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._