Strickler Formula for Average Height of Roughness Protrusions Calculator

✖Roughness Value is the arithmetic average of the absolute values of the roughness profile ordinates.ⓘ Strickler Formula for Average Height of Roughness Protrusions [R_a]

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Formula

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Strickler Formula for Average Height of Roughness Protrusions

Formula

`"R"_{"a"} = (21*"n")^(6)`

Example

`"0.256096mm"=(21*"0.012")^(6)`

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Strickler Formula for Average Height of Roughness Protrusions Solution

STEP 0: Pre-Calculation Summary

Formula Used

Roughness Value = (21*Manning’s Roughness Coefficient)^(6)
R_a = (21*n)^(6)
This formula uses 2 Variables

Variables Used

Roughness Value - (Measured in Meter) - Roughness Value is the arithmetic average of the absolute values of the roughness profile ordinates.
Manning’s Roughness Coefficient - Manning’s Roughness Coefficient represents the roughness or friction applied to the flow by the channel.

STEP 1: Convert Input(s) to Base Unit

Manning’s Roughness Coefficient: 0.012 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

R_a = (21*n)^(6) --> (21*0.012)^(6)

Evaluating ... ...

R_a = 0.000256096265048064

STEP 3: Convert Result to Output's Unit

0.000256096265048064 Meter -->0.256096265048064 Millimeter (Check conversion here)

FINAL ANSWER

0.256096265048064 ≈ 0.256096 Millimeter <-- Roughness Value

(Calculation completed in 00.004 seconds)

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Home » Engineering » Civil » Hydraulics and Waterworks » Uniform Flow in Channels » Average Velocity in Uniform Flow in Channels » Strickler Formula for Average Height of Roughness Protrusions

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National Institute of Technology Karnataka (NITK), Surathkal

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< 9 Average Velocity in Uniform Flow in Channels Calculators

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Go Bed Slope = (Average Velocity of Flow/(sqrt(8*[g]*Hydraulic Radius of Channel/Darcy Friction Factor)))^2

Hydraulic Radius given Average Velocity in Channel

Go Hydraulic Radius of Channel = (Average Velocity of Flow/(sqrt(8*[g]*Bed Slope/Darcy Friction Factor)))^2

Average Velocity in Channel

Go Average Velocity of Flow = sqrt(8*[g]*Hydraulic Radius of Channel*Bed Slope/Darcy Friction Factor)

Friction Factor given Average Velocity in Channel

Go Darcy Friction Factor = (8*[g]*Hydraulic Radius of Channel*Bed Slope/Average Velocity of Flow^2)

Specific Weight of Liquid given Boundary Shear Stress

Go Liquid Specific Weight = Shear Stress of Wall/(Hydraulic Radius of Channel*Bed Slope)

Slope of Channel Bottom given Boundary Shear Stress

Go Bed Slope = Shear Stress of Wall/(Liquid Specific Weight*Hydraulic Radius of Channel)

Hydraulic Radius given Boundary Shear Stress

Go Hydraulic Radius of Channel = Shear Stress of Wall/(Liquid Specific Weight*Bed Slope)

Boundary Shear Stress

Go Shear Stress of Wall = Liquid Specific Weight*Hydraulic Radius of Channel*Bed Slope

Strickler Formula for Average Height of Roughness Protrusions

Go Roughness Value = (21*Manning’s Roughness Coefficient)^(6)

Strickler Formula for Average Height of Roughness Protrusions Formula

Roughness Value = (21*Manning’s Roughness Coefficient)^(6)
R_a = (21*n)^(6)

What is Manning's Coefficient?

The Manning's n is a coefficient which represents the roughness or friction applied to the flow by the channel.

How to Calculate Strickler Formula for Average Height of Roughness Protrusions?

Strickler Formula for Average Height of Roughness Protrusions calculator uses Roughness Value = (21*Manning’s Roughness Coefficient)^(6) to calculate the Roughness Value, The Strickler Formula for Average Height of Roughness Protrusionsis defined as the roughness height of the flow. Roughness Value is denoted by R_a symbol.

How to calculate Strickler Formula for Average Height of Roughness Protrusions using this online calculator? To use this online calculator for Strickler Formula for Average Height of Roughness Protrusions, enter Manning’s Roughness Coefficient (n) and hit the calculate button. Here is how the Strickler Formula for Average Height of Roughness Protrusions calculation can be explained with given input values -> 256.0963 = (21*0.012)^(6).

FAQ

What is Strickler Formula for Average Height of Roughness Protrusions?

The Strickler Formula for Average Height of Roughness Protrusionsis defined as the roughness height of the flow and is represented as R_a = (21*n)^(6) or Roughness Value = (21*Manning’s Roughness Coefficient)^(6). Manning’s Roughness Coefficient represents the roughness or friction applied to the flow by the channel.

How to calculate Strickler Formula for Average Height of Roughness Protrusions?

The Strickler Formula for Average Height of Roughness Protrusionsis defined as the roughness height of the flow is calculated using Roughness Value = (21*Manning’s Roughness Coefficient)^(6). To calculate Strickler Formula for Average Height of Roughness Protrusions, you need Manning’s Roughness Coefficient (n). With our tool, you need to enter the respective value for Manning’s Roughness Coefficient 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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