# Gmsh Openfoam Orcaflex Stub Mode Details

> Sub-skill of gmsh-openfoam-orcaflex: Stub Mode Details.

- Skill: `vamseeachanta/gmsh-openfoam-orcaflex-stub-mode-details` (Agent Skill)
- Install (CLI): `npx skillmds@latest add vamseeachanta/gmsh-openfoam-orcaflex-stub-mode-details`
- Raw SKILL.md: https://api.skillmd.com/api/skills/vamseeachanta/gmsh-openfoam-orcaflex-stub-mode-details/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-stub-mode-details

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# Stub Mode Details

## Stub Mode Details


When `--stub-mode` is set or `PIPELINE_STUB_MODE=1`:

| Stub | Method | Outputs |
|------|--------|---------|
| `stub_gmsh.py` | Structured hex grid, cylinder void removed | Valid MSH2 file |
| `stub_openfoam.py` | Analytical Cd=1.0 drag, decaying residuals | log.simpleFoam + force.dat |
| `stub_orcaflex.py` | Fixed-free cantilever beam theory | deflection [m], tension [N] |

Analytical reference for cylinder drag:
```
F_drag = 0.5 * rho * U^2 * D * L * Cd
       = 0.5 * 1025 * 1.5^2 * 1.0 * 5.0 * 1.0
       = 5765.6 N   (for D=1m, L=5m, U=1.5m/s)
```