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Friction Velocity Formula

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The Friction Velocity is a measure of the velocity at which frictional forces act on a fluid, influencing its flow characteristics and behavior in liquid jets. Check FAQs

V f = V \cdot \sqrt{\frac{f}{8}}

V_f - Friction Velocity?V - Mean Velocity?f - Friction Factor?

Friction Velocity Example

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Here is how the Friction Velocity equation looks like with Values.

Here is how the Friction Velocity equation looks like with Units.

Here is how the Friction Velocity equation looks like.

9.8993 = 17.2 \cdot \sqrt{\frac{2.65}{8}}

9.8993m/s = 17.2m/s \cdot \sqrt{\frac{2.65}{8}}

9.8993 = 17.2 \cdot \sqrt{\frac{2.65}{8}}

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Friction Velocity Solution

Follow our step by step solution on how to calculate Friction Velocity?

FIRST Step Consider the formula

V f = V \cdot \sqrt{\frac{f}{8}}

Next Step Substitute values of Variables

∴

V f = 17.2m/s \cdot \sqrt{\frac{2.65}{8}}

Next Step Prepare to Evaluate

∴

V f = 17.2 \cdot \sqrt{\frac{2.65}{8}}

Next Step Evaluate

∴

V f = 9.89934341257035m/s

LAST Step Rounding Answer

∴

V f = 9.8993m/s

Friction Velocity Formula Elements

Variables

Functions

Friction Velocity

The Friction Velocity is a measure of the velocity at which frictional forces act on a fluid, influencing its flow characteristics and behavior in liquid jets.

Symbol: V_f

Measurement: SpeedUnit: m/s

Note: Value can be positive or negative.

Formulas to find Friction Velocity

Mean Velocity

The Mean Velocity is the average speed of a fluid in motion, often used to analyze the flow characteristics of liquids in various mechanical applications.

Symbol: V

Measurement: SpeedUnit: m/s

Note: Value can be positive or negative.

Formulas to find Mean Velocity

Friction Factor

The Friction Factor is a dimensionless number that quantifies the resistance to flow in a fluid due to friction within a pipe or duct.

Symbol: f

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Friction Factor

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 in Liquid Jet category

Go Angle of Jet given Maximum Vertical Elevation

Θ = a \sin (\sqrt{\frac{H \cdot 2 \cdot g}{{V o}^{2}}})

Go Angle of Jet given Time of Flight of Liquid Jet

Θ = a \sin (T \cdot \frac{g}{2 \cdot V o})

Go Angle of Jet given Time to Reach Highest Point

Θ = a \sin (T \cdot \frac{g}{V o})

Go Initial Velocity given Time of Flight of Liquid Jet

V o = T \cdot \frac{g}{\sin (Θ)}

How to Evaluate Friction Velocity?

Friction Velocity evaluator uses Friction Velocity = Mean Velocity*sqrt(Friction Factor/8) to evaluate the Friction Velocity, Friction Velocity formula is defined as a measure of the velocity at which fluid friction influences the flow characteristics of a liquid jet. It helps in understanding the relationship between fluid dynamics and the resistance encountered due to friction in various mechanical applications. Friction Velocity is denoted by V_f symbol.

How to evaluate Friction Velocity using this online evaluator? To use this online evaluator for Friction Velocity, enter Mean Velocity (V) & Friction Factor (f) and hit the calculate button.

FAQs on Friction Velocity

What is the formula to find Friction Velocity?

The formula of Friction Velocity is expressed as Friction Velocity = Mean Velocity*sqrt(Friction Factor/8). Here is an example- 9.899343 = 17.2*sqrt(2.65/8).

How to calculate Friction Velocity?

With Mean Velocity (V) & Friction Factor (f) we can find Friction Velocity using the formula - Friction Velocity = Mean Velocity*sqrt(Friction Factor/8). This formula also uses Square Root (sqrt) function(s).

Can the Friction Velocity be negative?

Yes, the Friction Velocity, measured in Speed can be negative.

Which unit is used to measure Friction Velocity?

Friction Velocity is usually measured using the Meter per Second[m/s] for Speed. Meter per Minute[m/s], Meter per Hour[m/s], Kilometer per Hour[m/s] are the few other units in which Friction Velocity can be measured.

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Friction Velocity Formula

Friction Velocity Example

Friction Velocity Solution

Friction Velocity Formula Elements

Other formulas in Liquid Jet category

How to Evaluate Friction Velocity?

FAQs on Friction Velocity

Variable Name