# Gmsh Openfoam Orcaflex Gate 1 Mesh Quality

> Sub-skill of gmsh-openfoam-orcaflex: Gate 1 — Mesh Quality (+1).

- Skill: `vamseeachanta/gmsh-openfoam-orcaflex-gate-1-mesh-quality` (Agent Skill)
- Install (CLI): `npx skillmds@latest add vamseeachanta/gmsh-openfoam-orcaflex-gate-1-mesh-quality`
- Raw SKILL.md: https://api.skillmd.com/api/skills/vamseeachanta/gmsh-openfoam-orcaflex-gate-1-mesh-quality/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: vamseeachanta (https://skillmd.com/u/vamseeachanta)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/vamseeachanta/gmsh-openfoam-orcaflex-gate-1-mesh-quality

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# Gate 1 — Mesh Quality (+1)

## Gate 1 — Mesh Quality


| Metric | Limit | Source |
|--------|-------|--------|
| Max skewness | < 4.0 | OpenFOAM checkMesh default |
| Max non-orthogonality | < 70 deg | OpenFOAM checkMesh default |
| Cell count | >= 100 | Pipeline minimum |

Gate uses `checkMesh` when OpenFOAM is sourced; falls back to gmsh Python API
quality metric; falls back to heuristic line count for bare environments.


## Gate 2 — CFD Convergence


| Metric | Limit | Source |
|--------|-------|--------|
| Final residuals (all) | < 1e-4 | Standard CFD convergence |
| Force balance error | < 5% | Conservation check |

Parses OpenFOAM `log.simpleFoam` for residual lines.  Also detects hard
divergence markers (`FOAM FATAL ERROR`, `Floating point exception`, etc.).