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Nusselt number for constant heat flux Formula

GoNusselt number at entrance region Formula

GoNusselt number for Smooth tubes Formula

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The Nusselt Number is the ratio of convective to conductive heat transfer at a boundary in a fluid. Convection includes both advection and diffusion. Check FAQs

Nu = 4.82 + 0.0185 \cdot {(Re D \cdot Pr)}^{0.827}

Nu - Nusselt Number?Re_D - Reynolds Number Dia?Pr - Prandtl Number?

Nusselt number for constant heat flux Example

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Here is how the Nusselt number for constant heat flux equation looks like with Values.

Here is how the Nusselt number for constant heat flux equation looks like with Units.

Here is how the Nusselt number for constant heat flux equation looks like.

10.97 = 4.82 + 0.0185 \cdot {(1600 \cdot 0.7)}^{0.827}

10.97 = 4.82 + 0.0185 \cdot {(1600 \cdot 0.7)}^{0.827}

10.97 = 4.82 + 0.0185 \cdot {(1600 \cdot 0.7)}^{0.827}

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Nusselt number for constant heat flux Solution

Follow our step by step solution on how to calculate Nusselt number for constant heat flux?

FIRST Step Consider the formula

Nu = 4.82 + 0.0185 \cdot {(Re D \cdot Pr)}^{0.827}

Next Step Substitute values of Variables

∴

Nu = 4.82 + 0.0185 \cdot {(1600 \cdot 0.7)}^{0.827}

Next Step Prepare to Evaluate

∴

Nu = 4.82 + 0.0185 \cdot {(1600 \cdot 0.7)}^{0.827}

Next Step Evaluate

∴

Nu = 10.9699988299677

LAST Step Rounding Answer

∴

Nu = 10.97

Nusselt number for constant heat flux Formula Elements

Variables

Nusselt Number

The Nusselt Number is the ratio of convective to conductive heat transfer at a boundary in a fluid. Convection includes both advection and diffusion.

Symbol: Nu

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Nusselt Number

Reynolds Number Dia

Reynolds Number Dia is the ratio of inertial forces to viscous forces.

Symbol: Re_D

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Reynolds Number Dia

Prandtl Number

The Prandtl number (Pr) or Prandtl group is a dimensionless number, named after the German physicist Ludwig Prandtl, defined as the ratio of momentum diffusivity to thermal diffusivity.

Symbol: Pr

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Prandtl Number

Other Formulas to find Nusselt Number

Go Nusselt number at entrance region

Nu = 0.036 \cdot ({Re D}^{0.8}) \cdot ({Pr}^{0.33}) \cdot {(\frac{D}{L})}^{0.055}

Go Nusselt number for Smooth tubes

Nu = 0.027 \cdot ({Re D}^{0.8}) \cdot ({Pr}^{0.333}) \cdot {(\frac{μ m}{μ w})}^{0.14}

Go Nusselt number for liquid metals at constant wall temperature

Nu = 5 + 0.025 \cdot {(Re D \cdot Pr)}^{0.8}

Go Nusselt number for smooth tubes and fully developed flow

Nu = 0.625 \cdot {(Re D \cdot Pr)}^{0.4}

Other formulas in Turbulent Flow category

Go Friction factor for Re greater than 2300

f = 0.25 \cdot {(1.82 \cdot \log 10 (Re D) - 1.64)}^{- 2}

Go Friction factor for Re greater than 10000

f = 0.184 \cdot {Re D}^{- 0.2}

Go Friction factor for rough tubes

f = \frac{1.325}{{(\ln ((\frac{e}{3.7} \cdot D) + (\frac{5.74}{{Re}^{0.9}})))}^{2}}

Go Friction factor for transitional turbulent flow

f = 0.316 \cdot {Re D}^{- 0.25}

How to Evaluate Nusselt number for constant heat flux?

Nusselt number for constant heat flux evaluator uses Nusselt Number = 4.82+0.0185*(Reynolds Number Dia*Prandtl Number)^0.827 to evaluate the Nusselt Number, The Nusselt number for constant heat flux formula is defined as is a measure of the ratio between heat transfer by convection (α) and heat transfer by conduction alone. Nusselt Number is denoted by Nu symbol.

How to evaluate Nusselt number for constant heat flux using this online evaluator? To use this online evaluator for Nusselt number for constant heat flux, enter Reynolds Number Dia (Re_D) & Prandtl Number (Pr) and hit the calculate button.

FAQs on Nusselt number for constant heat flux

What is the formula to find Nusselt number for constant heat flux?

The formula of Nusselt number for constant heat flux is expressed as Nusselt Number = 4.82+0.0185*(Reynolds Number Dia*Prandtl Number)^0.827. Here is an example- 10.97 = 4.82+0.0185*(1600*0.7)^0.827.

How to calculate Nusselt number for constant heat flux?

With Reynolds Number Dia (Re_D) & Prandtl Number (Pr) we can find Nusselt number for constant heat flux using the formula - Nusselt Number = 4.82+0.0185*(Reynolds Number Dia*Prandtl Number)^0.827.

What are the other ways to Calculate Nusselt Number?

Here are the different ways to Calculate Nusselt Number-

Nusselt Number=0.036*(Reynolds Number Dia^0.8)*(Prandtl Number^0.33)*(Diameter/Length)^0.055
Nusselt Number=0.027*(Reynolds Number Dia^0.8)*(Prandtl Number^0.333)*(Dynamic Viscosity at Mean Temperature/Dynamic Viscosity at Wall Temperature)^0.14
Nusselt Number=5+0.025*(Reynolds Number Dia*Prandtl Number)^0.8

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Nusselt number for constant heat flux Formula

​GoNusselt number at entrance region Formula

​GoNusselt number for Smooth tubes Formula

Nusselt number for constant heat flux Example

Nusselt number for constant heat flux Solution

Nusselt number for constant heat flux Formula Elements

Other Formulas to find Nusselt Number

Other formulas in Turbulent Flow category

How to Evaluate Nusselt number for constant heat flux?

FAQs on Nusselt number for constant heat flux

Variable Name

GoNusselt number at entrance region Formula

GoNusselt number for Smooth tubes Formula