FormulaDen.com

Physics Chemistry Math Chemical Engineering Civil Electrical Electronics Electronics and Instrumentation Materials Science Mechanical Production Engineering Financial Health

Strouhal number Formula

GoStrouhal number for cylinders Formula

Fx Copy

LaTeX Copy

Strouhal Number is a dimensionless number describing oscillating flow mechanisms. Check FAQs

S = \frac{n \cdot D vortex}{V ∞}

S - Strouhal Number?n - Frequency of Vortex Shedding?D_vortex - Diameter of Cylinder with Vortex?V_∞ - Freestream Velocity of Fluid?

Strouhal number Example

With values

With units

Only example

Here is how the Strouhal number equation looks like with Values.

Here is how the Strouhal number equation looks like with Units.

Here is how the Strouhal number equation looks like.

0.0617 = \frac{1.56 \cdot 0.85}{21.5}

0.0617 = \frac{1.56Hz \cdot 0.85m}{21.5m/s}

0.0617 = \frac{1.56 \cdot 0.85}{21.5}

Tip: Use pencil ( Pencil

) icon above to edit Input Values and Units.

Calculate

Recalculate

Solution

Copy

Reset

You are here -

Home » Category

Physics » Category

Mechanical » Category

Fluid Mechanics » fx Strouhal number

Strouhal number Solution

Follow our step by step solution on how to calculate Strouhal number?

FIRST Step Consider the formula

S = \frac{n \cdot D vortex}{V ∞}

Next Step Substitute values of Variables

∴

S = \frac{1.56Hz \cdot 0.85m}{21.5m/s}

Next Step Prepare to Evaluate

∴

S = \frac{1.56 \cdot 0.85}{21.5}

Next Step Evaluate

∴

S = 0.0616744186046512

LAST Step Rounding Answer

∴

S = 0.0617

Strouhal number Formula Elements

Variables

Strouhal Number

Strouhal Number is a dimensionless number describing oscillating flow mechanisms.

Symbol: S

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Strouhal Number

Frequency of Vortex Shedding

The Frequency of Vortex Shedding is defined as a dimensionless ratio that relates the wind velocity and the pipe diameter to the forcing frequency.

Symbol: n

Measurement: FrequencyUnit: Hz

Note: Value should be greater than 0.

Formulas to find Frequency of Vortex Shedding

Diameter of Cylinder with Vortex

Diameter of cylinder with vortex is the diameter of the internal surface of the cylinder having a vortex fluid flow.

Symbol: D_vortex

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Diameter of Cylinder with Vortex

Freestream Velocity of Fluid

Freestream Velocity of Fluid is the velocity of fluid far upstream of a body, that is before the body has a chance to deflect, slow down, or compress the fluid.

Symbol: V_∞

Measurement: SpeedUnit: m/s

Note: Value should be greater than 0.

Formulas to find Freestream Velocity of Fluid

Other Formulas to find Strouhal Number

Go Strouhal number for cylinders

S = 0.20 \cdot (1 - (\frac{20}{Re}))

Other formulas in Fluid Parameters and Characteristics category

Go Freestream Velocity for Lift Coefficient in Rotating Cylinder with Circulation

V ∞ = \frac{Γ c}{R \cdot C'}

Go Freestream velocity for lift coefficient with tangential speed

V ∞ = \frac{2 \cdot π \cdot v t}{C'}

Go Freestream Velocity for single Stagnation Point

V ∞ = \frac{Γ c}{4 \cdot π \cdot R}

Go Tangential velocity for single stagnation point

v t = 2 \cdot V ∞

How to Evaluate Strouhal number?

Strouhal number evaluator uses Strouhal Number = (Frequency of Vortex Shedding*Diameter of Cylinder with Vortex)/Freestream Velocity of Fluid to evaluate the Strouhal Number, The Strouhal number formula is defined as a measure of the ratio of the inertial forces due to the unsteadiness of the flow or local acceleration to the inertial forces due to changes in velocity from one point to another in the flow field. Strouhal Number is denoted by S symbol.

How to evaluate Strouhal number using this online evaluator? To use this online evaluator for Strouhal number, enter Frequency of Vortex Shedding (n), Diameter of Cylinder with Vortex (D_vortex) & Freestream Velocity of Fluid (V_∞) and hit the calculate button.

FAQs on Strouhal number

What is the formula to find Strouhal number?

The formula of Strouhal number is expressed as Strouhal Number = (Frequency of Vortex Shedding*Diameter of Cylinder with Vortex)/Freestream Velocity of Fluid. Here is an example- 0.061674 = (1.56*0.85)/21.5.

How to calculate Strouhal number?

With Frequency of Vortex Shedding (n), Diameter of Cylinder with Vortex (D_vortex) & Freestream Velocity of Fluid (V_∞) we can find Strouhal number using the formula - Strouhal Number = (Frequency of Vortex Shedding*Diameter of Cylinder with Vortex)/Freestream Velocity of Fluid.

What are the other ways to Calculate Strouhal Number?

Here are the different ways to Calculate Strouhal Number-

Strouhal Number=0.20*(1-(20/Reynolds Number))

Let Others Know

✖

Facebook

Twitter

Copied!

: Value
: Unit

Strouhal number Formula

​GoStrouhal number for cylinders Formula

Strouhal number Example

Strouhal number Solution

Strouhal number Formula Elements

Other Formulas to find Strouhal Number

Other formulas in Fluid Parameters and Characteristics category

How to Evaluate Strouhal number?

FAQs on Strouhal number

Variable Name

GoStrouhal number for cylinders Formula