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Nusselt number for smooth tubes and fully developed flow 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 = 0.625 \cdot {(Re D \cdot Pr)}^{0.4}

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

Nusselt number for smooth tubes and fully developed flow Example

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Here is how the Nusselt number for smooth tubes and fully developed flow equation looks like with Values.

Here is how the Nusselt number for smooth tubes and fully developed flow equation looks like with Units.

Here is how the Nusselt number for smooth tubes and fully developed flow equation looks like.

10.365 = 0.625 \cdot {(1600 \cdot 0.7)}^{0.4}

10.365 = 0.625 \cdot {(1600 \cdot 0.7)}^{0.4}

10.365 = 0.625 \cdot {(1600 \cdot 0.7)}^{0.4}

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Nusselt number for smooth tubes and fully developed flow Solution

Follow our step by step solution on how to calculate Nusselt number for smooth tubes and fully developed flow?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

Nu = 0.625 \cdot {(1600 \cdot 0.7)}^{0.4}

Next Step Prepare to Evaluate

∴

Nu = 0.625 \cdot {(1600 \cdot 0.7)}^{0.4}

Next Step Evaluate

∴

Nu = 10.3649503578032

LAST Step Rounding Answer

∴

Nu = 10.365

Nusselt number for smooth tubes and fully developed flow 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 constant heat flux

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

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 smooth tubes and fully developed flow?

Nusselt number for smooth tubes and fully developed flow evaluator uses Nusselt Number = 0.625*(Reynolds Number Dia*Prandtl Number)^0.4 to evaluate the Nusselt Number, The Nusselt number for smooth tubes and fully developed flow formula is defined as 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 smooth tubes and fully developed flow using this online evaluator? To use this online evaluator for Nusselt number for smooth tubes and fully developed flow, enter Reynolds Number Dia (Re_D) & Prandtl Number (Pr) and hit the calculate button.

FAQs on Nusselt number for smooth tubes and fully developed flow

What is the formula to find Nusselt number for smooth tubes and fully developed flow?

The formula of Nusselt number for smooth tubes and fully developed flow is expressed as Nusselt Number = 0.625*(Reynolds Number Dia*Prandtl Number)^0.4. Here is an example- 10.36495 = 0.625*(1600*0.7)^0.4.

How to calculate Nusselt number for smooth tubes and fully developed flow?

With Reynolds Number Dia (Re_D) & Prandtl Number (Pr) we can find Nusselt number for smooth tubes and fully developed flow using the formula - Nusselt Number = 0.625*(Reynolds Number Dia*Prandtl Number)^0.4.

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 smooth tubes and fully developed flow Formula

​GoNusselt number at entrance region Formula

​GoNusselt number for Smooth tubes Formula

Nusselt number for smooth tubes and fully developed flow Example

Nusselt number for smooth tubes and fully developed flow Solution

Nusselt number for smooth tubes and fully developed flow Formula Elements

Other Formulas to find Nusselt Number

Other formulas in Turbulent Flow category

How to Evaluate Nusselt number for smooth tubes and fully developed flow?

FAQs on Nusselt number for smooth tubes and fully developed flow

Variable Name

GoNusselt number at entrance region Formula

GoNusselt number for Smooth tubes Formula