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Length of Weir Crest is the measurement or extent of Weir Crest from end to end. Check FAQs
Lw=(QFr1.84Sw32)+(0.1nSw)
Lw - Length of Weir Crest?QFr - Francis Discharge?Sw - Height of Water above Crest of Weir?n - Number of End Contraction?

Length of Crest when Francis Formula Discharge and Velocity is not considered Example

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With units
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Here is how the Length of Crest when Francis Formula Discharge and Velocity is not considered equation looks like with Values.

Here is how the Length of Crest when Francis Formula Discharge and Velocity is not considered equation looks like with Units.

Here is how the Length of Crest when Francis Formula Discharge and Velocity is not considered equation looks like.

2.3372Edit=(8Edit1.842Edit32)+(0.14Edit2Edit)
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Length of Crest when Francis Formula Discharge and Velocity is not considered Solution

Follow our step by step solution on how to calculate Length of Crest when Francis Formula Discharge and Velocity is not considered?

FIRST Step Consider the formula
Lw=(QFr1.84Sw32)+(0.1nSw)
Next Step Substitute values of Variables
Lw=(8m³/s1.842m32)+(0.142m)
Next Step Prepare to Evaluate
Lw=(81.84232)+(0.142)
Next Step Evaluate
Lw=2.33718865475336m
LAST Step Rounding Answer
Lw=2.3372m

Length of Crest when Francis Formula Discharge and Velocity is not considered Formula Elements

Variables
Length of Weir Crest
Length of Weir Crest is the measurement or extent of Weir Crest from end to end.
Symbol: Lw
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Francis Discharge
Francis Discharge is calculated from the empirical formula given by Francis.
Symbol: QFr
Measurement: Volumetric Flow RateUnit: m³/s
Note: Value should be greater than 0.
Height of Water above Crest of Weir
Height of Water above Crest of Weir is defined as the water surface height above crest.
Symbol: Sw
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Number of End Contraction
Number of End Contraction 1 can be described as the end contractions acting on a channel.
Symbol: n
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.

Other Formulas to find Length of Weir Crest

​Go Length of Crest given Discharge Passing over Weir
Lw=QFr'32Cd2g((Sw+HV)32-HV32)
​Go Length of Crest without considering Velocity
Lw=(QFr23Cd2g)23+(0.1nSw)
​Go Length of Crest considering Velocity
Lw=(3QFr'2Cd2g(HStillwater32-HV32))+(0.1nHStillwater)
​Go Length of Crest when Francis Formula Discharge and Velocity is considered
Lw=(QFr1.84(HStillwater32-HV32))+(0.1nHStillwater)

How to Evaluate Length of Crest when Francis Formula Discharge and Velocity is not considered?

Length of Crest when Francis Formula Discharge and Velocity is not considered evaluator uses Length of Weir Crest = (Francis Discharge/(1.84*Height of Water above Crest of Weir^(3/2)))+(0.1*Number of End Contraction*Height of Water above Crest of Weir) to evaluate the Length of Weir Crest, The Length of crest when Francis formula discharge and velocity is not considered as it applies to the area of reclamation can be defined as ' The distance, measured along the axis. Length of Weir Crest is denoted by Lw symbol.

How to evaluate Length of Crest when Francis Formula Discharge and Velocity is not considered using this online evaluator? To use this online evaluator for Length of Crest when Francis Formula Discharge and Velocity is not considered, enter Francis Discharge (QFr), Height of Water above Crest of Weir (Sw) & Number of End Contraction (n) and hit the calculate button.

FAQs on Length of Crest when Francis Formula Discharge and Velocity is not considered

What is the formula to find Length of Crest when Francis Formula Discharge and Velocity is not considered?
The formula of Length of Crest when Francis Formula Discharge and Velocity is not considered is expressed as Length of Weir Crest = (Francis Discharge/(1.84*Height of Water above Crest of Weir^(3/2)))+(0.1*Number of End Contraction*Height of Water above Crest of Weir). Here is an example- 2.337189 = (8/(1.84*2^(3/2)))+(0.1*4*2).
How to calculate Length of Crest when Francis Formula Discharge and Velocity is not considered?
With Francis Discharge (QFr), Height of Water above Crest of Weir (Sw) & Number of End Contraction (n) we can find Length of Crest when Francis Formula Discharge and Velocity is not considered using the formula - Length of Weir Crest = (Francis Discharge/(1.84*Height of Water above Crest of Weir^(3/2)))+(0.1*Number of End Contraction*Height of Water above Crest of Weir).
What are the other ways to Calculate Length of Weir Crest?
Here are the different ways to Calculate Length of Weir Crest-
  • Length of Weir Crest=(Francis Discharge with Suppressed End*3)/(2*Coefficient of Discharge*sqrt(2*Acceleration due to Gravity)*((Height of Water above Crest of Weir+Velocity Head)^(3/2)-Velocity Head^(3/2)))OpenImg
  • Length of Weir Crest=((Francis Discharge*2)/(3*Coefficient of Discharge*sqrt(2*Acceleration due to Gravity)))^(2/3)+(0.1*Number of End Contraction*Height of Water above Crest of Weir)OpenImg
  • Length of Weir Crest=((3*Francis Discharge with Suppressed End)/(2*Coefficient of Discharge*sqrt(2*Acceleration due to Gravity)*(Still Water Head^(3/2)-Velocity Head^(3/2))))+(0.1*Number of End Contraction*Still Water Head)OpenImg
Can the Length of Crest when Francis Formula Discharge and Velocity is not considered be negative?
No, the Length of Crest when Francis Formula Discharge and Velocity is not considered, measured in Length cannot be negative.
Which unit is used to measure Length of Crest when Francis Formula Discharge and Velocity is not considered?
Length of Crest when Francis Formula Discharge and Velocity is not considered is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Length of Crest when Francis Formula Discharge and Velocity is not considered can be measured.
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