# 📐  L2 Spec — Oldroyd-B Viscoelastic Constitutive Model Mismatch-Only Spec

**ID:** `L2-477-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-477`](/artifact/l1/L1-477)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.45 · **Delta tier:** 5
> **⛓ On-chain block:** 41555303

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| Re | — | 0.0 – 100.0 |
| Wi | — | 0.1 – 20.0 |
| Mesh n | N | 16 – 256 |
| Beta eta s over eta total | — | 0.05 – 0.95 |

## 2. Tolerance (ε)

**Type:** `fn`

```
0.04 + 0.01*Wi + 0.005*mesh_error
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.45 |
| Delta tier | 5 |

## 4. Fingerprint

`2a654ef26cd27c0fe31db4124b123c97d5b176c561e717e1420377282a7a7fcf`

## 5. On-chain Registration

- **Chain hash:** `0x2fb0ca455ca0b47bbb1b809fbf8ac73313ee368d0d793243af8c48683a6b75b6`
- **Chain tx hash:** `0xce0ed3d32690f3adf0142d0ede2dd8598034852942deca2eed987051c25ae4b3`
- **Chain block:** `41555303`

---

## File Mapping

This bundle consists of: `L2-477-001.md`, `L2-477-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-477-001.md` | Source of truth — edit this | Human or LLM |
| `L2-477-001.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 `L2-477-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._