FormulaDen.com

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

Nusselt number at entrance region Formula

GoNusselt number for Smooth tubes Formula

GoNusselt number for liquid metals at constant wall temperature 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 = 0.036 \cdot ({Re D}^{0.8}) \cdot ({Pr}^{0.33}) \cdot {(\frac{D}{L})}^{0.055}

Nu - Nusselt Number?Re_D - Reynolds Number Dia?Pr - Prandtl Number?D - Diameter?L - Length?

Nusselt number at entrance region Example

With values

With units

Only example

Here is how the Nusselt number at entrance region equation looks like with Values.

Here is how the Nusselt number at entrance region equation looks like with Units.

Here is how the Nusselt number at entrance region equation looks like.

12.5095 = 0.036 \cdot (1600^{0.8}) \cdot ({0.7}^{0.33}) \cdot {(\frac{10}{3})}^{0.055}

12.5095 = 0.036 \cdot (1600^{0.8}) \cdot ({0.7}^{0.33}) \cdot {(\frac{10m}{3m})}^{0.055}

12.5095 = 0.036 \cdot (1600^{0.8}) \cdot ({0.7}^{0.33}) \cdot {(\frac{10}{3})}^{0.055}

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 at entrance region

Nusselt number at entrance region Solution

Follow our step by step solution on how to calculate Nusselt number at entrance region?

FIRST Step Consider the formula

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

Next Step Substitute values of Variables

∴

Nu = 0.036 \cdot (1600^{0.8}) \cdot ({0.7}^{0.33}) \cdot {(\frac{10m}{3m})}^{0.055}

Next Step Prepare to Evaluate

∴

Nu = 0.036 \cdot (1600^{0.8}) \cdot ({0.7}^{0.33}) \cdot {(\frac{10}{3})}^{0.055}

Next Step Evaluate

∴

Nu = 12.509477522199

LAST Step Rounding Answer

∴

Nu = 12.5095

Nusselt number at entrance 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

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

Diameter

Diameter is a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.

Symbol: D

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Diameter

Length

Length is the measurement or extent of something from end to end.

Symbol: L

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Length

Other Formulas to find Nusselt Number

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}

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 at entrance region?

Nusselt number at entrance region evaluator uses Nusselt Number = 0.036*(Reynolds Number Dia^0.8)*(Prandtl Number^0.33)*(Diameter/Length)^0.055 to evaluate the Nusselt Number, The Nusselt number at entrance region formula is defined as 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 at entrance region using this online evaluator? To use this online evaluator for Nusselt number at entrance region, enter Reynolds Number Dia (Re_D), Prandtl Number (Pr), Diameter (D) & Length (L) and hit the calculate button.

FAQs on Nusselt number at entrance region

What is the formula to find Nusselt number at entrance region?

The formula of Nusselt number at entrance region is expressed as Nusselt Number = 0.036*(Reynolds Number Dia^0.8)*(Prandtl Number^0.33)*(Diameter/Length)^0.055. Here is an example- 12.50948 = 0.036*(1600^0.8)*(0.7^0.33)*(10/3)^0.055.

How to calculate Nusselt number at entrance region?

With Reynolds Number Dia (Re_D), Prandtl Number (Pr), Diameter (D) & Length (L) we can find Nusselt number at entrance region using the formula - Nusselt Number = 0.036*(Reynolds Number Dia^0.8)*(Prandtl Number^0.33)*(Diameter/Length)^0.055.

What are the other ways to Calculate Nusselt Number?

Here are the different ways to Calculate Nusselt Number-

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
Nusselt Number=4.82+0.0185*(Reynolds Number Dia*Prandtl Number)^0.827

Let Others Know

✖

Facebook

Twitter

Copied!

: Value
: Unit

Nusselt number at entrance region Formula

​GoNusselt number for Smooth tubes Formula

​GoNusselt number for liquid metals at constant wall temperature Formula

Nusselt number at entrance region Example

Nusselt number at entrance region Solution

Nusselt number at entrance region Formula Elements

Other Formulas to find Nusselt Number

Other formulas in Turbulent Flow category

How to Evaluate Nusselt number at entrance region?

FAQs on Nusselt number at entrance region

Variable Name

GoNusselt number for Smooth tubes Formula

GoNusselt number for liquid metals at constant wall temperature Formula