FormulaDen.com

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

Nusselt number for liquids for external flow Formula

GoNusselt number Formula

GoNusselt number for gases 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 = \frac{0.97 + 0.68 \cdot ({Re}^{0.5})}{{Pr}^{- 0.3}}

Nu - Nusselt Number?Re - Reynolds Number?Pr - Prandtl Number?

Nusselt number for liquids for external flow Example

With values

With units

Only example

Here is how the Nusselt number for liquids for external flow equation looks like with Values.

Here is how the Nusselt number for liquids for external flow equation looks like with Units.

Here is how the Nusselt number for liquids for external flow equation looks like.

370.1534 = \frac{0.97 + 0.68 \cdot (50000^{0.5})}{19^{- 0.3}}

370.1534 = \frac{0.97 + 0.68 \cdot (50000^{0.5})}{19^{- 0.3}}

370.1534 = \frac{0.97 + 0.68 \cdot (50000^{0.5})}{19^{- 0.3}}

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 liquids for external flow

Nusselt number for liquids for external flow Solution

Follow our step by step solution on how to calculate Nusselt number for liquids for external flow?

FIRST Step Consider the formula

Nu = \frac{0.97 + 0.68 \cdot ({Re}^{0.5})}{{Pr}^{- 0.3}}

Next Step Substitute values of Variables

∴

Nu = \frac{0.97 + 0.68 \cdot (50000^{0.5})}{19^{- 0.3}}

Next Step Prepare to Evaluate

∴

Nu = \frac{0.97 + 0.68 \cdot (50000^{0.5})}{19^{- 0.3}}

Next Step Evaluate

∴

Nu = 370.153381189153

LAST Step Rounding Answer

∴

Nu = 370.1534

Nusselt number for liquids for external 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

The Reynolds number is the ratio of inertial forces to viscous forces within a fluid which is subjected to relative internal movement due to different fluid velocities.

Symbol: Re

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Reynolds Number

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

Nu = 0.37 \cdot {Re}^{0.6}

Go Nusselt number for gases

Nu = 2 + {(0.25 \cdot Re + (3 \cdot 10^{- 4}) \cdot ({Re}^{1.6}))}^{0.5}

Go Nusselt number for air

Nu = 430 + ((5 \cdot (10^{- 3})) \cdot (Re)) + ((0.025 \cdot (10^{- 9})) \cdot ({Re}^{2})) - ((3.1 \cdot (10^{- 17})) \cdot ({Re}^{3}))

Go Nusselt number for oils and water

Nu = \frac{1.2 + 0.53 \cdot ({Re}^{0.54})}{({Pr}^{- 0.3}) \cdot {(\frac{μ w}{μ ∞})}^{0.25}}

How to Evaluate Nusselt number for liquids for external flow?

Nusselt number for liquids for external flow evaluator uses Nusselt Number = (0.97+0.68*(Reynolds Number^0.5))/(Prandtl Number^-0.3) to evaluate the Nusselt Number, Nusselt number for liquids for external flow formula is defined as a dimensionless quantity that characterizes convective heat transfer between a fluid and a solid surface, specifically for external flow over a sphere, providing a measure of the ratio of convective to conductive heat transfer. Nusselt Number is denoted by Nu symbol.

How to evaluate Nusselt number for liquids for external flow using this online evaluator? To use this online evaluator for Nusselt number for liquids for external flow, enter Reynolds Number (Re) & Prandtl Number (Pr) and hit the calculate button.

FAQs on Nusselt number for liquids for external flow

What is the formula to find Nusselt number for liquids for external flow?

The formula of Nusselt number for liquids for external flow is expressed as Nusselt Number = (0.97+0.68*(Reynolds Number^0.5))/(Prandtl Number^-0.3). Here is an example- 370.1534 = (0.97+0.68*(50000^0.5))/(19^-0.3).

How to calculate Nusselt number for liquids for external flow?

With Reynolds Number (Re) & Prandtl Number (Pr) we can find Nusselt number for liquids for external flow using the formula - Nusselt Number = (0.97+0.68*(Reynolds Number^0.5))/(Prandtl Number^-0.3).

What are the other ways to Calculate Nusselt Number?

Here are the different ways to Calculate Nusselt Number-

Nusselt Number=0.37*Reynolds Number^0.6
Nusselt Number=2+(0.25*Reynolds Number+(3*10^-4)*(Reynolds Number^1.6))^0.5
Nusselt Number=430+((5*(10^-3))*(Reynolds Number))+((0.025*(10^-9))*(Reynolds Number^2))-((3.1*(10^-17))*(Reynolds Number^3))

Let Others Know

✖

Facebook

Twitter

Copied!

: Value
: Unit

Nusselt number for liquids for external flow Formula

​GoNusselt number Formula

​GoNusselt number for gases Formula

Nusselt number for liquids for external flow Example

Nusselt number for liquids for external flow Solution

Nusselt number for liquids for external flow Formula Elements

Other Formulas to find Nusselt Number

How to Evaluate Nusselt number for liquids for external flow?

FAQs on Nusselt number for liquids for external flow

Variable Name

GoNusselt number Formula

GoNusselt number for gases Formula