Viv Analysis Strouhal Number

Sub-skill of viv-analysis: Strouhal Number (+2).

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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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