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Velocity Pressure in Ducts Formula

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Velocity Pressure in Duct is the pressure required to accelerate air from zero velocity to some velocity (V) and is proportional to the kinetic energy of the air stream. Check FAQs

P v = 0.6 \cdot {V m}^{2}

P_v - Velocity Pressure in Duct?V_m - Mean Velocity of Air?

Velocity Pressure in Ducts Example

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Here is how the Velocity Pressure in Ducts equation looks like with Values.

Here is how the Velocity Pressure in Ducts equation looks like with Units.

Here is how the Velocity Pressure in Ducts equation looks like.

13.7615 = 0.6 \cdot 15^{2}

13.7615mmAq = 0.6 \cdot {15m/s}^{2}

13.7615 = 0.6 \cdot 15^{2}

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Velocity Pressure in Ducts Solution

Follow our step by step solution on how to calculate Velocity Pressure in Ducts?

FIRST Step Consider the formula

P v = 0.6 \cdot {V m}^{2}

Next Step Substitute values of Variables

∴

P v = 0.6 \cdot {15m/s}^{2}

Next Step Prepare to Evaluate

∴

P v = 0.6 \cdot 15^{2}

Next Step Evaluate

∴

P v = 135Pa

Next Step Convert to Output's Unit

∴

P v = 13.7614678899083mmAq

LAST Step Rounding Answer

∴

P v = 13.7615mmAq

Velocity Pressure in Ducts Formula Elements

Variables

Velocity Pressure in Duct

Velocity Pressure in Duct is the pressure required to accelerate air from zero velocity to some velocity (V) and is proportional to the kinetic energy of the air stream.

Symbol: P_v

Measurement: PressureUnit: mmAq

Note: Value can be positive or negative.

Formulas to find Velocity Pressure in Duct

Mean Velocity of Air

Mean Velocity of Air is defined as the time average of the velocity of a fluid at a fixed point, over a somewhat arbitrary time interval T counted from some fixed time t0.

Symbol: V_m

Measurement: SpeedUnit: m/s

Note: Value should be greater than 0.

Formulas to find Mean Velocity of Air

Other formulas in Parameters of Ducts category

Go Reynolds Number in Duct

Re = \frac{d \cdot V m}{υ}

Go Equivalent Diameter of Circular Duct for Rectangular Duct when Quantity of Air is Same

D e = 1.256 \cdot {(\frac{a^{3} \cdot b^{3}}{a + b})}^{0.2}

Go Reynolds Number given Friction Factor for Laminar Flow

Re = \frac{64}{f}

Go Equivalent Diameter of Circular Duct for Rectangular Duct when Velocity of Air is Same

D e = \frac{2 \cdot a \cdot b}{a + b}

How to Evaluate Velocity Pressure in Ducts?

Velocity Pressure in Ducts evaluator uses Velocity Pressure in Duct = 0.6*Mean Velocity of Air^2 to evaluate the Velocity Pressure in Duct, Velocity Pressure in Ducts formula is defined as the pressure exerted by the flow of air or gas in a duct, which is a key factor in determining the performance of heating, ventilation, and air conditioning systems, as well as other industrial processes that involve airflow. Velocity Pressure in Duct is denoted by P_v symbol.

How to evaluate Velocity Pressure in Ducts using this online evaluator? To use this online evaluator for Velocity Pressure in Ducts, enter Mean Velocity of Air (V_m) and hit the calculate button.

FAQs on Velocity Pressure in Ducts

What is the formula to find Velocity Pressure in Ducts?

The formula of Velocity Pressure in Ducts is expressed as Velocity Pressure in Duct = 0.6*Mean Velocity of Air^2. Here is an example- 1.4028 = 0.6*15^2.

How to calculate Velocity Pressure in Ducts?

With Mean Velocity of Air (V_m) we can find Velocity Pressure in Ducts using the formula - Velocity Pressure in Duct = 0.6*Mean Velocity of Air^2.

Can the Velocity Pressure in Ducts be negative?

Yes, the Velocity Pressure in Ducts, measured in Pressure can be negative.

Which unit is used to measure Velocity Pressure in Ducts?

Velocity Pressure in Ducts is usually measured using the Millimeter Water (4 °C)[mmAq] for Pressure. Pascal[mmAq], Kilopascal[mmAq], Bar[mmAq] are the few other units in which Velocity Pressure in Ducts can be measured.

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