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Height of Liquid Crest over Weir Formula

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Weir Crest is designed to have a specific height for the liquid flow across the tray. Check FAQs

h ow = (\frac{750}{1000}) \cdot ({(\frac{L w}{l w \cdot ρ L})}^{\frac{2}{3}})

h_ow - Weir Crest?L_w - Liquid Mass Flowrate?l_w - Weir Length?ρ_L - Liquid Density?

Height of Liquid Crest over Weir Example

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Here is how the Height of Liquid Crest over Weir equation looks like with Values.

Here is how the Height of Liquid Crest over Weir equation looks like with Units.

Here is how the Height of Liquid Crest over Weir equation looks like.

0.0227 = (\frac{750}{1000}) \cdot ({(\frac{12.856}{2.452 \cdot 995})}^{\frac{2}{3}})

0.0227m = (\frac{750}{1000}) \cdot ({(\frac{12.856kg/s}{2.452m \cdot 995kg/m³})}^{\frac{2}{3}})

0.0227 = (\frac{750}{1000}) \cdot ({(\frac{12.856}{2.452 \cdot 995})}^{\frac{2}{3}})

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Height of Liquid Crest over Weir Solution

Follow our step by step solution on how to calculate Height of Liquid Crest over Weir?

FIRST Step Consider the formula

h ow = (\frac{750}{1000}) \cdot ({(\frac{L w}{l w \cdot ρ L})}^{\frac{2}{3}})

Next Step Substitute values of Variables

∴

h ow = (\frac{750}{1000}) \cdot ({(\frac{12.856kg/s}{2.452m \cdot 995kg/m³})}^{\frac{2}{3}})

Next Step Prepare to Evaluate

∴

h ow = (\frac{750}{1000}) \cdot ({(\frac{12.856}{2.452 \cdot 995})}^{\frac{2}{3}})

Next Step Evaluate

∴

h ow = 0.0227109939449152m

LAST Step Rounding Answer

∴

h ow = 0.0227m

Height of Liquid Crest over Weir Formula Elements

Variables

Weir Crest

Weir Crest is designed to have a specific height for the liquid flow across the tray.

Symbol: h_ow

Measurement: LengthUnit: m

Note: Value can be positive or negative.

Formulas to find Weir Crest

Liquid Mass Flowrate

Liquid Mass Flowrate is the mass flow rate of the liquid component in the column.

Symbol: L_w

Measurement: Mass Flow RateUnit: kg/s

Note: Value should be greater than 0.

Formulas to find Liquid Mass Flowrate

Weir Length

The weir length refers to the length of support strips which plays a significant role in controlling liquid distribution, within the column.

Symbol: l_w

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Weir Length

Liquid Density

Liquid Density is defined as the ratio of mass of given fluid with respect to the volume that it occupies.

Symbol: ρ_L

Measurement: DensityUnit: kg/m³

Note: Value should be greater than 0.

Formulas to find Liquid Density

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Go Clearance Area under Downcomer given Weir Length and Apron Height

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A a = \frac{G v}{f d \cdot u f}

Go Column Diameter Based on Vapor Flowrate and Mass Velocity of Vapor

D c = {(\frac{4 \cdot V W}{π \cdot W max})}^{\frac{1}{2}}

Go Column Diameter given Maximum Vapor Rate and Maximum Vapor Velocity

D c = \sqrt{\frac{4 \cdot V W}{π \cdot ρ V \cdot U v}}

How to Evaluate Height of Liquid Crest over Weir?

Height of Liquid Crest over Weir evaluator uses Weir Crest = (750/1000)*((Liquid Mass Flowrate/(Weir Length*Liquid Density))^(2/3)) to evaluate the Weir Crest, The Height of Liquid Crest over Weir formula is defined as the boundary for the liquid flow across the tray. It plays a crucial role in controlling the flow of liquid on the tray. Weir Crest is denoted by h_ow symbol.

How to evaluate Height of Liquid Crest over Weir using this online evaluator? To use this online evaluator for Height of Liquid Crest over Weir, enter Liquid Mass Flowrate (L_w), Weir Length (l_w) & Liquid Density (ρ_L) and hit the calculate button.

FAQs on Height of Liquid Crest over Weir

What is the formula to find Height of Liquid Crest over Weir?

The formula of Height of Liquid Crest over Weir is expressed as Weir Crest = (750/1000)*((Liquid Mass Flowrate/(Weir Length*Liquid Density))^(2/3)). Here is an example- 0.022711 = (750/1000)*((12.856/(2.452*995))^(2/3)).

How to calculate Height of Liquid Crest over Weir?

With Liquid Mass Flowrate (L_w), Weir Length (l_w) & Liquid Density (ρ_L) we can find Height of Liquid Crest over Weir using the formula - Weir Crest = (750/1000)*((Liquid Mass Flowrate/(Weir Length*Liquid Density))^(2/3)).

Can the Height of Liquid Crest over Weir be negative?

Yes, the Height of Liquid Crest over Weir, measured in Length can be negative.

Which unit is used to measure Height of Liquid Crest over Weir?

Height of Liquid Crest over Weir is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Height of Liquid Crest over Weir can be measured.

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Height of Liquid Crest over Weir Formula

Height of Liquid Crest over Weir Example

Height of Liquid Crest over Weir Solution

Height of Liquid Crest over Weir Formula Elements

Other formulas in Distillation Tower Design category

How to Evaluate Height of Liquid Crest over Weir?

FAQs on Height of Liquid Crest over Weir

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