Sub-skill of viv-analysis: Strouhal Number (+2).
Scanned 9/9/2026
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---
name: viv-analysis-strouhal-number
description: 'Sub-skill of viv-analysis: Strouhal Number (+2).'
version: 1.0.0
category: engineering
type: reference
scripts_exempt: true
---
# Strouhal Number (+2)
## Strouhal Number
| Geometry | Strouhal Number |
|----------|-----------------|
| Smooth cylinder | 0.2 |
| Rough cylinder | 0.21 |
| Straked cylinder | 0.14-0.18 |
## Reduced Velocity Ranges
| Condition | Reduced Velocity Range |
|-----------|----------------------|
| Cross-flow VIV onset | 4 - 8 |
| In-line VIV onset | 1 - 3.5 |
| Lock-in region | 5 - 7 |
## Added Mass Coefficients
| Configuration | Ca |
|---------------|-----|
| Circular cylinder in infinite fluid | 1.0 |
| Near seabed (gap/D = 0.5) | 1.2 |
| Near seabed (gap/D = 0.1) | 2.0 |
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Understand the components, mechanics, and constraints of context in agent systems. Use when designing agent architectures, debugging context-related failures, or optimizing context usage.
