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Reynolds Number in Duct Formula

GoReynolds Number given Friction Factor for Laminar Flow Formula

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Reynolds Number is the ratio of inertial forces to viscous forces within a fluid which is subjected to relative internal movement due to different fluid velocities. Check FAQs

Re = \frac{d \cdot V m}{υ}

Re - Reynolds Number?d - Diameter of Circular Duct?V_m - Mean Velocity of Air?υ - Kinematic Viscosity?

Reynolds Number in Duct Example

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Here is how the Reynolds Number in Duct equation looks like with Values.

Here is how the Reynolds Number in Duct equation looks like with Units.

Here is how the Reynolds Number in Duct equation looks like.

80.0001 = \frac{533.334 \cdot 15}{100}

80.0001 = \frac{533.334m \cdot 15m/s}{100m²/s}

80.0001 = \frac{533.334 \cdot 15}{100}

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Reynolds Number in Duct Solution

Follow our step by step solution on how to calculate Reynolds Number in Duct?

FIRST Step Consider the formula

Re = \frac{d \cdot V m}{υ}

Next Step Substitute values of Variables

∴

Re = \frac{533.334m \cdot 15m/s}{100m²/s}

Next Step Prepare to Evaluate

∴

Re = \frac{533.334 \cdot 15}{100}

LAST Step Evaluate

∴

Re = 80.0001

Reynolds Number in Duct Formula Elements

Variables

Reynolds Number

Reynolds Number is the ratio of inertial forces to viscous forces within a fluid which is subjected to relative internal movement due to different fluid velocities.

Symbol: Re

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Reynolds Number

Diameter of Circular Duct

Diameter of Circular Duct is a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.

Symbol: d

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Diameter of Circular Duct

Mean Velocity of Air

Mean Velocity of Air is defined as the time average of the velocity of a fluid at a fixed point, over a somewhat arbitrary time interval T counted from some fixed time t0.

Symbol: V_m

Measurement: SpeedUnit: m/s

Note: Value should be greater than 0.

Formulas to find Mean Velocity of Air

Kinematic Viscosity

Kinematic Viscosity is a measure of a fluid's internal resistance to flow under gravitational forces.

Symbol: υ

Measurement: Kinematic ViscosityUnit: m²/s

Note: Value can be positive or negative.

Formulas to find Kinematic Viscosity

Other Formulas to find Reynolds Number

Go Reynolds Number given Friction Factor for Laminar Flow

Re = \frac{64}{f}

Other formulas in Parameters of Ducts category

Go Equivalent Diameter of Circular Duct for Rectangular Duct when Quantity of Air is Same

D e = 1.256 \cdot {(\frac{a^{3} \cdot b^{3}}{a + b})}^{0.2}

Go Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same

D e = \frac{2 \cdot a \cdot b}{a + b}

Go Velocity Pressure in Ducts

P v = 0.6 \cdot {V m}^{2}

Go Quantity of Air given Velocity

Q = V \cdot A cs

How to Evaluate Reynolds Number in Duct?

Reynolds Number in Duct evaluator uses Reynolds Number = (Diameter of Circular Duct*Mean Velocity of Air)/Kinematic Viscosity to evaluate the Reynolds Number, Reynolds Number in Duct formula is defined as a dimensionless value that predicts the nature of fluid flow in a duct, providing insight into the flow pattern, whether it is laminar, turbulent, or in a transitional state, which is essential in designing and optimizing various engineering systems and applications. Reynolds Number is denoted by Re symbol.

How to evaluate Reynolds Number in Duct using this online evaluator? To use this online evaluator for Reynolds Number in Duct, enter Diameter of Circular Duct (d), Mean Velocity of Air (V_m) & Kinematic Viscosity (υ) and hit the calculate button.

FAQs on Reynolds Number in Duct

What is the formula to find Reynolds Number in Duct?

The formula of Reynolds Number in Duct is expressed as Reynolds Number = (Diameter of Circular Duct*Mean Velocity of Air)/Kinematic Viscosity. Here is an example- 0.0015 = (533.334*15)/100.

How to calculate Reynolds Number in Duct?

With Diameter of Circular Duct (d), Mean Velocity of Air (V_m) & Kinematic Viscosity (υ) we can find Reynolds Number in Duct using the formula - Reynolds Number = (Diameter of Circular Duct*Mean Velocity of Air)/Kinematic Viscosity.

What are the other ways to Calculate Reynolds Number?

Here are the different ways to Calculate Reynolds Number-

Reynolds Number=64/Friction Factor in Duct

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Reynolds Number in Duct Formula

​GoReynolds Number given Friction Factor for Laminar Flow Formula

Reynolds Number in Duct Example

Reynolds Number in Duct Solution

Reynolds Number in Duct Formula Elements

Other Formulas to find Reynolds Number

Other formulas in Parameters of Ducts category

How to Evaluate Reynolds Number in Duct?

FAQs on Reynolds Number in Duct

Variable Name

GoReynolds Number given Friction Factor for Laminar Flow Formula