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Blasius Equation Formula

GoFrictional Factor given Reynolds Number Formula

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The Friction Factor or Moody chart is the plot of the relative roughness (e/D) of a pipe against Reynold's number. Check FAQs

f = \frac{0.316}{{Re}^{\frac{1}{4}}}

f - Friction Factor?Re - Roughness Reynold Number?

Blasius Equation Example

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Here is how the Blasius Equation equation looks like with Values.

Here is how the Blasius Equation equation looks like with Units.

Here is how the Blasius Equation equation looks like.

0.1777 = \frac{0.316}{10^{\frac{1}{4}}}

0.1777 = \frac{0.316}{10^{\frac{1}{4}}}

0.1777 = \frac{0.316}{10^{\frac{1}{4}}}

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Blasius Equation Solution

Follow our step by step solution on how to calculate Blasius Equation?

FIRST Step Consider the formula

f = \frac{0.316}{{Re}^{\frac{1}{4}}}

Next Step Substitute values of Variables

∴

f = \frac{0.316}{10^{\frac{1}{4}}}

Next Step Prepare to Evaluate

∴

f = \frac{0.316}{10^{\frac{1}{4}}}

Next Step Evaluate

∴

f = 0.17769985876015

LAST Step Rounding Answer

∴

f = 0.1777

Blasius Equation Formula Elements

Variables

Friction Factor

The Friction Factor or Moody chart is the plot of the relative roughness (e/D) of a pipe against Reynold's number.

Symbol: f

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Friction Factor

Roughness Reynold Number

The Roughness Reynold Number is a dimensionless number used in fluid dynamics to characterize the influence of surface roughness on flow behavior.

Symbol: Re

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Roughness Reynold Number

Other Formulas to find Friction Factor

Go Frictional Factor given Reynolds Number

f = 0.0032 + \frac{0.221}{{Re}^{0.237}}

Other formulas in Turbulent Flow category

Go Shear Velocity for Turbulent Flow in Pipes

V' = \sqrt{\frac{𝜏}{ρ f}}

Go Shear Stress Developed for Turbulent Flow in Pipes

𝜏 = ρ f \cdot {V'}^{2}

Go Roughness Reynold Number for Turbulent Flow in Pipes

Re = \frac{k \cdot V'}{v'}

Go Average Height of Irregularities for Turbulent Flow in Pipes

k = \frac{v' \cdot Re}{V'}

How to Evaluate Blasius Equation?

Blasius Equation evaluator uses Friction Factor = (0.316)/(Roughness Reynold Number^(1/4)) to evaluate the Friction Factor, The Blasius Equation formula is defined as the steady two-dimensional laminar boundary layer that forms on a semi-infinite plate that is held parallel to a constant unidirectional flow. Friction Factor is denoted by f symbol.

How to evaluate Blasius Equation using this online evaluator? To use this online evaluator for Blasius Equation, enter Roughness Reynold Number (Re) and hit the calculate button.

FAQs on Blasius Equation

What is the formula to find Blasius Equation?

The formula of Blasius Equation is expressed as Friction Factor = (0.316)/(Roughness Reynold Number^(1/4)). Here is an example- 0.1777 = (0.316)/(10^(1/4)).

How to calculate Blasius Equation?

With Roughness Reynold Number (Re) we can find Blasius Equation using the formula - Friction Factor = (0.316)/(Roughness Reynold Number^(1/4)).

What are the other ways to Calculate Friction Factor?

Here are the different ways to Calculate Friction Factor-

Friction Factor=0.0032+0.221/(Roughness Reynold Number^0.237)

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