Friction factor for rough tubes Calculator

✖Surface Roughness is denied as the rough texture on the surface of the material.ⓘ Surface Roughness [e]			+10% -10%
✖Diameter is a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.ⓘ Diameter [D]			+10% -10%
✖The 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. A region where these forces change behavior is known as a boundary layer, such as the bounding surface in the interior of a pipe.ⓘ Reynolds Number [Re]			+10% -10%

✖The Friction factor or Moody chart is the plot of the relative roughness (e/D) of a pipe against Reynold's number.ⓘ Friction factor for rough tubes [f]

⎘ Copy

👎

Formula

LaTeX

Reset

👍

Download Internal Flow Formula PDF PDF Image

Friction factor for rough tubes Solution

STEP 0: Pre-Calculation Summary

Formula Used

Friction Factor = 1.325/((ln((Surface Roughness/3.7*Diameter)+(5.74/(Reynolds Number^0.9))))^2)
f = 1.325/((ln((e/3.7*D)+(5.74/(Re^0.9))))^2)
This formula uses 1 Functions, 4 Variables

Functions Used

ln - The natural logarithm, also known as the logarithm to the base e, is the inverse function of the natural exponential function., ln(Number)

Variables Used

Friction Factor - The Friction factor or Moody chart is the plot of the relative roughness (e/D) of a pipe against Reynold's number.
Surface Roughness - Surface Roughness is denied as the rough texture on the surface of the material.
Diameter - (Measured in Meter) - Diameter is a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.
Reynolds Number - The 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. A region where these forces change behavior is known as a boundary layer, such as the bounding surface in the interior of a pipe.

STEP 1: Convert Input(s) to Base Unit

Surface Roughness: 0.042 --> No Conversion Required
Diameter: 10 Meter --> 10 Meter No Conversion Required
Reynolds Number: 5000 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

f = 1.325/((ln((e/3.7*D)+(5.74/(Re^0.9))))^2) --> 1.325/((ln((0.042/3.7*10)+(5.74/(5000^0.9))))^2)

Evaluating ... ...

f = 0.286000539341371

STEP 3: Convert Result to Output's Unit

0.286000539341371 --> No Conversion Required

FINAL ANSWER

0.286000539341371 ≈ 0.286001 <-- Friction Factor

(Calculation completed in 00.020 seconds)

You are here -

Home » Physics » Heat and Mass Transfer » Internal Flow » Flow inside tubes » Mechanical » Turbulent Flow » Friction factor for rough tubes

Credits

Created by Nishan Poojary

Shri Madhwa Vadiraja Institute of Technology and Management (SMVITM), Udupi

Nishan Poojary has created this Calculator and 500+ more calculators!

Verified by Rajat Vishwakarma

University Institute of Technology RGPV (UIT - RGPV), Bhopal

Rajat Vishwakarma has verified this Calculator and 400+ more calculators!

< Turbulent Flow Calculators

Friction factor for rough tubes

LaTeX Go Friction Factor = 1.325/((ln((Surface Roughness/3.7*Diameter)+(5.74/(Reynolds Number^0.9))))^2)

Friction factor for Re greater than 2300

LaTeX Go Friction Factor = 0.25*(1.82*log10(Reynolds Number Dia)-1.64)^-2

Friction factor for Re greater than 10000

LaTeX Go Friction Factor = 0.184*Reynolds Number Dia^(-0.2)

Friction factor for transitional turbulent flow

LaTeX Go Friction Factor = 0.316*Reynolds Number Dia^-0.25

Friction factor for rough tubes Formula

LaTeX Go

Friction Factor = 1.325/((ln((Surface Roughness/3.7*Diameter)+(5.74/(Reynolds Number^0.9))))^2)
f = 1.325/((ln((e/3.7*D)+(5.74/(Re^0.9))))^2)

What is internal flow

Internal flow is a flow for which the fluid is confined by a surface. Hence the boundary layer is unable to develop without eventually being constrained. The internal flow configuration represents a convenient geometry for heating and cooling fluids used in chemical processing, environmental control, and energy conversion technologies.
An example includes flow in a pipe.

How to Calculate Friction factor for rough tubes?

Friction factor for rough tubes calculator uses Friction Factor = 1.325/((ln((Surface Roughness/3.7*Diameter)+(5.74/(Reynolds Number^0.9))))^2) to calculate the Friction Factor, The Friction factor for rough tubes formula is defined as the loss of pressure of a fluid in a pipe due to the interactions in between the fluid and the pipe. Friction Factor is denoted by f symbol.

How to calculate Friction factor for rough tubes using this online calculator? To use this online calculator for Friction factor for rough tubes, enter Surface Roughness (e), Diameter (D) & Reynolds Number (Re) and hit the calculate button. Here is how the Friction factor for rough tubes calculation can be explained with given input values -> 0.286001 = 1.325/((ln((0.042/3.7*10)+(5.74/(5000^0.9))))^2).

FAQ

What is Friction factor for rough tubes?

The Friction factor for rough tubes formula is defined as the loss of pressure of a fluid in a pipe due to the interactions in between the fluid and the pipe and is represented as f = 1.325/((ln((e/3.7*D)+(5.74/(Re^0.9))))^2) or Friction Factor = 1.325/((ln((Surface Roughness/3.7*Diameter)+(5.74/(Reynolds Number^0.9))))^2). Surface Roughness is denied as the rough texture on the surface of the material, Diameter is a straight line passing from side to side through the center of a body or figure, especially a circle or sphere & The 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. A region where these forces change behavior is known as a boundary layer, such as the bounding surface in the interior of a pipe.

How to calculate Friction factor for rough tubes?

The Friction factor for rough tubes formula is defined as the loss of pressure of a fluid in a pipe due to the interactions in between the fluid and the pipe is calculated using Friction Factor = 1.325/((ln((Surface Roughness/3.7*Diameter)+(5.74/(Reynolds Number^0.9))))^2). To calculate Friction factor for rough tubes, you need Surface Roughness (e), Diameter (D) & Reynolds Number (Re). With our tool, you need to enter the respective value for Surface Roughness, Diameter & Reynolds Number and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Friction Factor?

In this formula, Friction Factor uses Surface Roughness, Diameter & Reynolds Number. We can use 3 other way(s) to calculate the same, which is/are as follows -

Friction Factor = 0.25*(1.82*log10(Reynolds Number Dia)-1.64)^-2
Friction Factor = 0.184*Reynolds Number Dia^(-0.2)
Friction Factor = 0.316*Reynolds Number Dia^-0.25

Home

FREE PDFs

🔍 Search