FormulaDen.com

Physics Chemistry Math Chemical Engineering Civil Electrical Electronics Electronics and Instrumentation Materials Science Mechanical Production Engineering Financial Health

Nusselt number for thermal entry region Formula

GoNusselt number at entrance region Formula

GoNusselt number for Smooth tubes Formula

Fx Copy

LaTeX Copy

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 = 3.0 \cdot {Re D}^{0.0833}

Nu - Nusselt Number?Re_D - Reynolds Number Dia?

Nusselt number for thermal entry region Example

With values

With units

Only example

Here is how the Nusselt number for thermal entry region equation looks like with Values.

Here is how the Nusselt number for thermal entry region equation looks like with Units.

Here is how the Nusselt number for thermal entry region equation looks like.

5.5466 = 3.0 \cdot 1600^{0.0833}

5.5466 = 3.0 \cdot 1600^{0.0833}

5.5466 = 3.0 \cdot 1600^{0.0833}

Tip: Use pencil ( Pencil

) icon above to edit Input Values and Units.

Calculate

Recalculate

Solution

Copy

Reset

You are here -

Home » Category

Physics » Category

Mechanical » Category

Heat and Mass Transfer » fx Nusselt number for thermal entry region

Nusselt number for thermal entry region Solution

Follow our step by step solution on how to calculate Nusselt number for thermal entry region?

FIRST Step Consider the formula

Nu = 3.0 \cdot {Re D}^{0.0833}

Next Step Substitute values of Variables

∴

Nu = 3.0 \cdot 1600^{0.0833}

Next Step Prepare to Evaluate

∴

Nu = 3.0 \cdot 1600^{0.0833}

Next Step Evaluate

∴

Nu = 5.54656937343187

LAST Step Rounding Answer

∴

Nu = 5.5466

Nusselt number for thermal entry region 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

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 thermal entry region?

Nusselt number for thermal entry region evaluator uses Nusselt Number = 3.0*Reynolds Number Dia^0.0833 to evaluate the Nusselt Number, The Nusselt number for thermal entry region 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 thermal entry region using this online evaluator? To use this online evaluator for Nusselt number for thermal entry region, enter Reynolds Number Dia (Re_D) and hit the calculate button.

FAQs on Nusselt number for thermal entry region

What is the formula to find Nusselt number for thermal entry region?

The formula of Nusselt number for thermal entry region is expressed as Nusselt Number = 3.0*Reynolds Number Dia^0.0833. Here is an example- 5.546569 = 3.0*1600^0.0833.

How to calculate Nusselt number for thermal entry region?

With Reynolds Number Dia (Re_D) we can find Nusselt number for thermal entry region using the formula - Nusselt Number = 3.0*Reynolds Number Dia^0.0833.

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

Let Others Know

✖

Facebook

Twitter

Copied!

: Value
: Unit