Riser Vortex Shedding - Strouhal

Vortex-shedding frequency on a cylindrical riser from Strouhal number - basis for VIV fatigue assessment.

RiserVIVStrouhal

Riser ODmCurrent velocitym/s

Shedding freq: 0.480Hz

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

f_s = St \cdot V / D

Symbol	Meaning	Unit
$St$	Strouhal number
$D$	Riser diameter	m

Source: Blevins - Flow-Induced Vibration

In short

Vortex-shedding frequency on a cylindrical riser from Strouhal number - basis for VIV fatigue assessment.

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