# Strouhal number

(Difference between revisions)
 Revision as of 00:18, 20 September 2005 (view source)← Older edit Revision as of 03:32, 20 September 2005 (view source)Praveen (Talk | contribs) Newer edit → Line 1: Line 1: - The Strouhal Number is a dimensionless parameter describing the oscillating frequency of a flow. Usually it is defined as: + The Strouhal number is a dimensionless parameter describing the oscillating frequency of a flow. Usually it is defined as:

:$:[itex] - St = \frac{fL}{U} + St := \frac{fL}{U}$ [/itex] where $f$ is the frequency of the flow (e.g. vortex shedding frequency), $L$ is a characteristic length scale of the flow and $U$ is a characteristic velocity. where $f$ is the frequency of the flow (e.g. vortex shedding frequency), $L$ is a characteristic length scale of the flow and $U$ is a characteristic velocity.

- The Strouhal Number is a function of the [[Reynolds Number]] typically between 20 < Re < 20,000. + The Strouhal Number is a function of the [[Reynolds number]], typically between 20 < Re < 20,000.

## Revision as of 03:32, 20 September 2005

The Strouhal number is a dimensionless parameter describing the oscillating frequency of a flow. Usually it is defined as:

$St := \frac{fL}{U}$

where $f$ is the frequency of the flow (e.g. vortex shedding frequency), $L$ is a characteristic length scale of the flow and $U$ is a characteristic velocity.

The Strouhal Number is a function of the Reynolds number, typically between 20 < Re < 20,000.