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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=0.453(Re0.5)(Pr0.333)
Nu - Nusselt Number?Re - Reynolds Number?Pr - Prandtl Number?

Nusselt number for constant heat flux for external flow Example

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

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

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

28.4447Edit=0.453(5000Edit0.5)(0.7Edit0.333)
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Nusselt number for constant heat flux for external flow Solution

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

FIRST Step Consider the formula
Nu=0.453(Re0.5)(Pr0.333)
Next Step Substitute values of Variables
Nu=0.453(50000.5)(0.70.333)
Next Step Prepare to Evaluate
Nu=0.453(50000.5)(0.70.333)
Next Step Evaluate
Nu=28.4446668448609
LAST Step Rounding Answer
Nu=28.4447

Nusselt number for constant heat flux 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.
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.
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.

Other Formulas to find Nusselt Number

​Go Nusselt number for constant wall temperature
Nu=0.332(Re0.5)(Pr0.333)
​Go Nusselt number if heating starts from distance Xo from leading edge
Nu=0.332(Rex0.5)(Pr0.333)(1-(xox)0.75)-0.333
​Go Nusselt number for liquid metals and for silicones
Nu=0.3387(Re0.5)(Pr0.333)(1+(0.0468Pr)0.67)0.25
​Go Nusselt number for liquid metals only
Nu=0.565(RePr)0.5

Other formulas in Laminar Flow category

​Go Hydrodynamic boundary layer thickness at distance X from leading edge
𝛿hx=5xRex-0.5
​Go Thermal boundary layer thickness at distance X from leading edge
𝛿Tx=𝛿hxPr-0.333
​Go Displacement thickness
𝛿d=𝛿hx3
​Go Momentum thickness
θ=𝛿hx7

How to Evaluate Nusselt number for constant heat flux for external flow?

Nusselt number for constant heat flux for external flow evaluator uses Nusselt Number = 0.453*(Reynolds Number^0.5)*(Prandtl Number^0.333) to evaluate the Nusselt Number, Nusselt number for constant heat flux for external flow formula is defined as a dimensionless quantity that characterizes convective heat transfer between a solid surface and a fluid flowing over it, particularly in the context of flow over a flat plate. Nusselt Number is denoted by Nu symbol.

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

FAQs on Nusselt number for constant heat flux for external flow

What is the formula to find Nusselt number for constant heat flux for external flow?
The formula of Nusselt number for constant heat flux for external flow is expressed as Nusselt Number = 0.453*(Reynolds Number^0.5)*(Prandtl Number^0.333). Here is an example- 28.44467 = 0.453*(5000^0.5)*(0.7^0.333).
How to calculate Nusselt number for constant heat flux for external flow?
With Reynolds Number (Re) & Prandtl Number (Pr) we can find Nusselt number for constant heat flux for external flow using the formula - Nusselt Number = 0.453*(Reynolds Number^0.5)*(Prandtl Number^0.333).
What are the other ways to Calculate Nusselt Number?
Here are the different ways to Calculate Nusselt Number-
  • Nusselt Number=0.332*(Reynolds Number^0.5)*(Prandtl Number^0.333)OpenImg
  • Nusselt Number=0.332*(Reynolds Number(x)^0.5)*(Prandtl Number^0.333)*(1-(Leading Edge Distance/Distance from Point to YY Axis)^0.75)^(-0.333)OpenImg
  • Nusselt Number=(0.3387*(Reynolds Number^0.5)*(Prandtl Number^0.333))/((1+(0.0468/Prandtl Number)^(0.67))^0.25)OpenImg
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