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Rate of Flow Formula

GoRate of Flow given Head loss in Laminar Flow Formula

GoRate of Flow given Hydraulic Transmission Power Formula

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Rate of Flow is the rate at which a liquid or other substance flows through a particular channel, pipe, etc. Check FAQs

Q f = A \cdot V avg

Q_f - Rate of Flow?A - Cross Sectional Area?V_avg - Average Velocity?

Rate of Flow Example

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With units

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Here is how the Rate of Flow equation looks like with Values.

Here is how the Rate of Flow equation looks like with Units.

Here is how the Rate of Flow equation looks like.

24.102 = 1.3 \cdot 18.54

24.102m³/s = 1.3m² \cdot 18.54m/s

24.102 = 1.3 \cdot 18.54

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Rate of Flow Solution

Follow our step by step solution on how to calculate Rate of Flow?

FIRST Step Consider the formula

Q f = A \cdot V avg

Next Step Substitute values of Variables

∴

Q f = 1.3m² \cdot 18.54m/s

Next Step Prepare to Evaluate

∴

Q f = 1.3 \cdot 18.54

LAST Step Evaluate

∴

Q f = 24.102m³/s

Rate of Flow Formula Elements

Variables

Rate of Flow

Rate of Flow is the rate at which a liquid or other substance flows through a particular channel, pipe, etc.

Symbol: Q_f

Measurement: Volumetric Flow RateUnit: m³/s

Note: Value should be greater than 0.

Formulas to find Rate of Flow

Cross Sectional Area

Cross Sectional Area is the area of a two-dimensional shape that is obtained when a three-dimensional shape is sliced perpendicular to some specified axis at a point.

Symbol: A

Measurement: AreaUnit: m²

Note: Value should be greater than 0.

Formulas to find Cross Sectional Area

Average Velocity

Average Velocity is defined as the mean of all different velocities.

Symbol: V_avg

Measurement: SpeedUnit: m/s

Note: Value should be greater than 0.

Formulas to find Average Velocity

Other Formulas to find Rate of Flow

Go Rate of Flow given Head loss in Laminar Flow

Q f = h l \cdot γ f \cdot π \cdot \frac{{d p}^{4}}{128 \cdot μ \cdot L p}

Go Rate of Flow given Hydraulic Transmission Power

Q f = \frac{P}{γ l \cdot (H e - h l)}

Other formulas in Flow Rate category

Go Volumetric Flow Rate at Vena Contracta

V f = C d \cdot A vc \cdot \sqrt{2 \cdot [g] \cdot H w}

Go Volumetric Flow Rate of Circular Orifice

V f = 0.62 \cdot a \cdot \sqrt{2 \cdot [g] \cdot H w}

Go Volumetric Flow Rate of Rectangular Notch

V f = 0.62 \cdot b \cdot H \cdot \frac{2}{3} \cdot \sqrt{2 \cdot [g] \cdot H w}

Go Volumetric Flow Rate of Triangular Right Angled Notch

V f = 2.635 \cdot H^{\frac{5}{2}}

How to Evaluate Rate of Flow?

Rate of Flow evaluator uses Rate of Flow = Cross Sectional Area*Average Velocity to evaluate the Rate of Flow, Rate of flow (or) Discharge is the rate at which a liquid or other substance flows through a particular channel, pipe, etc. Rate of Flow is denoted by Q_f symbol.

How to evaluate Rate of Flow using this online evaluator? To use this online evaluator for Rate of Flow, enter Cross Sectional Area (A) & Average Velocity (V_avg) and hit the calculate button.

FAQs on Rate of Flow

What is the formula to find Rate of Flow?

The formula of Rate of Flow is expressed as Rate of Flow = Cross Sectional Area*Average Velocity. Here is an example- 24.102 = 1.3*18.54.

How to calculate Rate of Flow?

With Cross Sectional Area (A) & Average Velocity (V_avg) we can find Rate of Flow using the formula - Rate of Flow = Cross Sectional Area*Average Velocity.

What are the other ways to Calculate Rate of Flow?

Here are the different ways to Calculate Rate of Flow-

Rate of Flow=Head Loss of Fluid*Specific Weight*pi*(Diameter of Pipe^4)/(128*Viscous Force*Length of Pipe)
Rate of Flow=Power/(Specific Weight of Liquid*(Total Head at Entrance-Head Loss of Fluid))

Can the Rate of Flow be negative?

No, the Rate of Flow, measured in Volumetric Flow Rate cannot be negative.

Which unit is used to measure Rate of Flow?

Rate of Flow is usually measured using the Cubic Meter per Second[m³/s] for Volumetric Flow Rate. Cubic Meter per Day[m³/s], Cubic Meter per Hour[m³/s], Cubic Meter per Minute[m³/s] are the few other units in which Rate of Flow can be measured.

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Rate of Flow Formula

​GoRate of Flow given Head loss in Laminar Flow Formula

​GoRate of Flow given Hydraulic Transmission Power Formula

Rate of Flow Example

Rate of Flow Solution

Rate of Flow Formula Elements

Other Formulas to find Rate of Flow

Other formulas in Flow Rate category

How to Evaluate Rate of Flow?

FAQs on Rate of Flow

Variable Name

GoRate of Flow given Head loss in Laminar Flow Formula

GoRate of Flow given Hydraulic Transmission Power Formula