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Friction Coefficient Formula

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Local Friction Coefficient for the flow in ducts is the ratio of wall shearing stress and dynamic head of the stream. Check FAQs

C fx = \frac{τ w}{0.5 \cdot ρ \cdot ({u f}^{2})}

C_fx - Local Friction Coefficient?τ_w - Wall Shear Stress?ρ - Density?u_f - Fluid Velocity?

Friction Coefficient Example

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Here is how the Friction Coefficient equation looks like with Values.

Here is how the Friction Coefficient equation looks like with Units.

Here is how the Friction Coefficient equation looks like.

4.9E-5 = \frac{3.5}{0.5 \cdot 997 \cdot (12^{2})}

4.9E-5 = \frac{3.5Pa}{0.5 \cdot 997kg/m³ \cdot ({12m/s}^{2})}

4.9E-5 = \frac{3.5}{0.5 \cdot 997 \cdot (12^{2})}

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Friction Coefficient Solution

Follow our step by step solution on how to calculate Friction Coefficient?

FIRST Step Consider the formula

C fx = \frac{τ w}{0.5 \cdot ρ \cdot ({u f}^{2})}

Next Step Substitute values of Variables

∴

C fx = \frac{3.5Pa}{0.5 \cdot 997kg/m³ \cdot ({12m/s}^{2})}

Next Step Prepare to Evaluate

∴

C fx = \frac{3.5}{0.5 \cdot 997 \cdot (12^{2})}

Next Step Evaluate

∴

C fx = 4.87573832608938E-05

LAST Step Rounding Answer

∴

C fx = 4.9E-5

Friction Coefficient Formula Elements

Variables

Local Friction Coefficient

Local Friction Coefficient for the flow in ducts is the ratio of wall shearing stress and dynamic head of the stream.

Symbol: C_fx

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Local Friction Coefficient

Wall Shear Stress

Wall shear stress is defined as the shear stress in the layer of fluid next to the wall of a pipe.

Symbol: τ_w

Measurement: PressureUnit: Pa

Note: Value can be positive or negative.

Formulas to find Wall Shear Stress

Density

The Density of a material shows the denseness of that material in a specific given area. This is taken as mass per unit volume of a given object.

Symbol: ρ

Measurement: DensityUnit: kg/m³

Note: Value should be greater than 0.

Formulas to find Density

Fluid Velocity

Fluid velocity is the volume of fluid flowing in the given vessel per unit cross sectional area.

Symbol: u_f

Measurement: SpeedUnit: m/s

Note: Value can be positive or negative.

Formulas to find Fluid Velocity

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How to Evaluate Friction Coefficient?

Friction Coefficient evaluator uses Local Friction Coefficient = Wall Shear Stress/(0.5*Density*(Fluid Velocity^2)) to evaluate the Local Friction Coefficient, The Friction Coefficient is defined as the ratio of wall shear stress to the dynamic head of the stream. Local Friction Coefficient is denoted by C_fx symbol.

How to evaluate Friction Coefficient using this online evaluator? To use this online evaluator for Friction Coefficient, enter Wall Shear Stress (τ_w), Density (ρ) & Fluid Velocity (u_f) and hit the calculate button.

FAQs on Friction Coefficient

What is the formula to find Friction Coefficient?

The formula of Friction Coefficient is expressed as Local Friction Coefficient = Wall Shear Stress/(0.5*Density*(Fluid Velocity^2)). Here is an example- 4.9E-5 = 3.5/(0.5*997*(12^2)).

How to calculate Friction Coefficient?

With Wall Shear Stress (τ_w), Density (ρ) & Fluid Velocity (u_f) we can find Friction Coefficient using the formula - Local Friction Coefficient = Wall Shear Stress/(0.5*Density*(Fluid Velocity^2)).

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Friction Coefficient Formula

Friction Coefficient Example

Friction Coefficient Solution

Friction Coefficient Formula Elements

Other formulas in Others and Extra category

How to Evaluate Friction Coefficient?

FAQs on Friction Coefficient

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