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Manning Coefficient is dimensionless and varies depending on the type of channel or surface through which water flows. Check FAQs
n=hf0.157(2R)43Lp'vf2
n - Manning Coefficient?hf - Head Loss?R - Pipe Radius?Lp' - Pipe Length?vf - Flow Velocity?

Manning's Coefficient by Manning Formula given Radius of Pipe Example

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With units
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Here is how the Manning's Coefficient by Manning Formula given Radius of Pipe equation looks like with Values.

Here is how the Manning's Coefficient by Manning Formula given Radius of Pipe equation looks like with Units.

Here is how the Manning's Coefficient by Manning Formula given Radius of Pipe equation looks like.

0.0089Edit=1.2Edit0.157(2200Edit)434.9Edit11.96Edit2
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Manning's Coefficient by Manning Formula given Radius of Pipe Solution

Follow our step by step solution on how to calculate Manning's Coefficient by Manning Formula given Radius of Pipe?

FIRST Step Consider the formula
n=hf0.157(2R)43Lp'vf2
Next Step Substitute values of Variables
n=1.2m0.157(2200mm)434.9m11.96m/s2
Next Step Convert Units
n=1.2m0.157(20.2m)434.9m11.96m/s2
Next Step Prepare to Evaluate
n=1.20.157(20.2)434.911.962
Next Step Evaluate
n=0.00890057144130676
LAST Step Rounding Answer
n=0.0089

Manning's Coefficient by Manning Formula given Radius of Pipe Formula Elements

Variables
Functions
Manning Coefficient
Manning Coefficient is dimensionless and varies depending on the type of channel or surface through which water flows.
Symbol: n
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Head Loss
Head Loss is a measure of the reduction in the total head (sum of elevation head, velocity head and pressure head) of the fluid as it moves through a fluid system.
Symbol: hf
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Pipe Radius
The Pipe Radius is the radius of the pipe through which the fluid is flowing.
Symbol: R
Measurement: LengthUnit: mm
Note: Value should be greater than 0.
Pipe Length
Pipe Length describes the length of the pipe in which the liquid is flowing.
Symbol: Lp'
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Flow Velocity
Flow Velocity refers to the speed at which a fluid, such as a liquid or gas, moves through a particular area within a given time.
Symbol: vf
Measurement: SpeedUnit: m/s
Note: Value should be greater than 0.
sqrt
A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number.
Syntax: sqrt(Number)

Other Formulas to find Manning Coefficient

​Go Manning's Coefficient given Velocity of Flow
n=(Rh23)(S12)vf
​Go Manning's Coefficient given Diameter of Pipe
n=(0.397vf)(Dp23)(S12)
​Go Manning's Coefficient given Head loss by Manning Formula
n=hf0.157Dp43Lp'vf2

Other formulas in Manning's Formula category

​Go Velocity of Flow in Pipe by Manning Formula
vf=(1n)(Rh23)(S12)
​Go Radius of Pipe given Velocity of Flow in Pipe by Manning Formula
Rh=(vfnS12)32
​Go Hydraulic Gradient given Velocity of Flow in Pipe by Manning Formula
S=(vfnRh23)2
​Go Velocity of Flow in Pipe by Manning Formula given Diameter
vf=(0.397n)(Dp23)(S12)

How to Evaluate Manning's Coefficient by Manning Formula given Radius of Pipe?

Manning's Coefficient by Manning Formula given Radius of Pipe evaluator uses Manning Coefficient = sqrt((Head Loss*0.157*(2*Pipe Radius)^(4/3))/(Pipe Length*Flow Velocity^2)) to evaluate the Manning Coefficient, The Manning's Coefficient by Manning Formula given Radius of Pipe is defined as the value of Manning's Coefficient when we have prior information of radius of pipe and other parameters required. Manning Coefficient is denoted by n symbol.

How to evaluate Manning's Coefficient by Manning Formula given Radius of Pipe using this online evaluator? To use this online evaluator for Manning's Coefficient by Manning Formula given Radius of Pipe, enter Head Loss (hf), Pipe Radius (R), Pipe Length (Lp') & Flow Velocity (vf) and hit the calculate button.

FAQs on Manning's Coefficient by Manning Formula given Radius of Pipe

What is the formula to find Manning's Coefficient by Manning Formula given Radius of Pipe?
The formula of Manning's Coefficient by Manning Formula given Radius of Pipe is expressed as Manning Coefficient = sqrt((Head Loss*0.157*(2*Pipe Radius)^(4/3))/(Pipe Length*Flow Velocity^2)). Here is an example- 0.008901 = sqrt((1.2*0.157*(2*0.2)^(4/3))/(4.9*11.96^2)).
How to calculate Manning's Coefficient by Manning Formula given Radius of Pipe?
With Head Loss (hf), Pipe Radius (R), Pipe Length (Lp') & Flow Velocity (vf) we can find Manning's Coefficient by Manning Formula given Radius of Pipe using the formula - Manning Coefficient = sqrt((Head Loss*0.157*(2*Pipe Radius)^(4/3))/(Pipe Length*Flow Velocity^2)). This formula also uses Square Root (sqrt) function(s).
What are the other ways to Calculate Manning Coefficient?
Here are the different ways to Calculate Manning Coefficient-
  • Manning Coefficient=((Hydraulic Radius^(2/3))*(Hydraulic Gradient^(1/2)))/Flow VelocityOpenImg
  • Manning Coefficient=(0.397/Flow Velocity)*(Diameter of Pipe^(2/3))*(Hydraulic Gradient^(1/2))OpenImg
  • Manning Coefficient=sqrt((Head Loss*0.157*Diameter of Pipe^(4/3))/(Pipe Length*Flow Velocity^2))OpenImg
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