Friction Coefficient Solution

STEP 0: Pre-Calculation Summary
Formula Used
Local Friction Coefficient = Wall Shear Stress/(0.5*Density*(Fluid Velocity^2))
Cfx = τw/(0.5*ρ*(uf^2))
This formula uses 4 Variables
Variables Used
Local Friction Coefficient - Local Friction Coefficient for the flow in ducts is the ratio of wall shearing stress and dynamic head of the stream.
Wall Shear Stress - (Measured in Pascal) - Wall shear stress is defined as the shear stress in the layer of fluid next to the wall of a pipe.
Density - (Measured in Kilogram per Cubic Meter) - 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.
Fluid Velocity - (Measured in Meter per Second) - Fluid velocity is the volume of fluid flowing in the given vessel per unit cross sectional area.
STEP 1: Convert Input(s) to Base Unit
Wall Shear Stress: 3.5 Pascal --> 3.5 Pascal No Conversion Required
Density: 997 Kilogram per Cubic Meter --> 997 Kilogram per Cubic Meter No Conversion Required
Fluid Velocity: 12 Meter per Second --> 12 Meter per Second No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Cfx = τw/(0.5*ρ*(uf^2)) --> 3.5/(0.5*997*(12^2))
Evaluating ... ...
Cfx = 4.87573832608938E-05
STEP 3: Convert Result to Output's Unit
4.87573832608938E-05 --> No Conversion Required
FINAL ANSWER
4.87573832608938E-05 4.9E-5 <-- Local Friction Coefficient
(Calculation completed in 00.004 seconds)

Credits

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Created by Vinay Mishra
Indian Institute for Aeronautical Engineering and Information Technology (IIAEIT), Pune
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Verified by Maiarutselvan V
PSG College of Technology (PSGCT), Coimbatore
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Friction Coefficient Formula

Local Friction Coefficient = Wall Shear Stress/(0.5*Density*(Fluid Velocity^2))
Cfx = τw/(0.5*ρ*(uf^2))

What does wall shear stress depend upon?

The magnitude of wall shear stress depends on how fast the fluid velocity increases when moving from the pipe wall toward the center of the pipe. This velocity gradient near the wall is called the wall shear rate.

How to Calculate Friction Coefficient?

Friction Coefficient calculator uses Local Friction Coefficient = Wall Shear Stress/(0.5*Density*(Fluid Velocity^2)) to calculate 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 Cfx symbol.

How to calculate Friction Coefficient using this online calculator? To use this online calculator for Friction Coefficient, enter Wall Shear Stress w), Density (ρ) & Fluid Velocity (uf) and hit the calculate button. Here is how the Friction Coefficient calculation can be explained with given input values -> 4.9E-5 = 3.5/(0.5*997*(12^2)).

FAQ

What is Friction Coefficient?
The Friction Coefficient is defined as the ratio of wall shear stress to the dynamic head of the stream and is represented as Cfx = τw/(0.5*ρ*(uf^2)) or Local Friction Coefficient = Wall Shear Stress/(0.5*Density*(Fluid Velocity^2)). Wall shear stress is defined as the shear stress in the layer of fluid next to the wall of a pipe, 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 & Fluid velocity is the volume of fluid flowing in the given vessel per unit cross sectional area.
How to calculate Friction Coefficient?
The Friction Coefficient is defined as the ratio of wall shear stress to the dynamic head of the stream is calculated using Local Friction Coefficient = Wall Shear Stress/(0.5*Density*(Fluid Velocity^2)). To calculate Friction Coefficient, you need Wall Shear Stress w), Density (ρ) & Fluid Velocity (uf). With our tool, you need to enter the respective value for Wall Shear Stress, Density & Fluid Velocity and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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