# 📐 L2 Spec — Volume of Fluid (VOF) — multiphase interface tracking Mismatch-Only Spec
**ID:** `L2-183-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-183`](/artifact/l1/L1-183)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.48 · **Delta tier:** 5
> **⛓ On-chain block:** 41553970
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 32 – 8192 |
| W | px | 32 – 8192 |
| Snr db | dB | 0 – 40 |
| N times | — | 100 – 1000000 |
| Coalescence artifact | — | 0.0 – 0.3 |
| Surface tension error | — | 0.0 – 0.3 |
| Interface thickness error | — | 0.0 – 0.3 |
## 2. Tolerance (ε)
**Type:** `fn`
```
16.0 + 0.3*SNR_dB - 10.0*interface_thickness_error - 15.0*surface_tension_error - 8.0*coalescence_artifact
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.48 |
| Delta tier | 5 |
## 4. Fingerprint
`e803fb2de28a9c004eb7d63a9a962ff1dbe29e93bb3c3026174260b3ee1f74bf`
## 5. On-chain Registration
- **Chain hash:** `0xc9ae3a6812ff842a0adc0f6d5ebf7556a0e6a1f6bf20070494543765d114e091`
- **Chain tx hash:** `0x6fbfe4fdb340dbf4301d5c3603618c3f89d50ceff56c125ae4c9e8f78059b123`
- **Chain block:** `41553970`
---
## File Mapping
This bundle consists of: `L2-183-001.md`, `L2-183-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-183-001.md` | Source of truth — edit this | Human or LLM |
| `L2-183-001.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 `L2-183-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._