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Nusselt Number(L) Based on Length is the ratio of convective to conductive heat transfer across a boundary. Check FAQs
NuL=(0.18(PrRaL0.2+Pr)0.29)
NuL - Nusselt Number(L) Based on Length?Pr - Prandtl Number?RaL - Rayleigh Number Based on Length?

Nusselt number for small aspect ratio Example

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Here is how the Nusselt number for small aspect ratio equation looks like with Values.

Here is how the Nusselt number for small aspect ratio equation looks like with Units.

Here is how the Nusselt number for small aspect ratio equation looks like.

0.1234Edit=(0.18(0.7Edit0.35Edit0.2+0.7Edit)0.29)
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Nusselt number for small aspect ratio Solution

Follow our step by step solution on how to calculate Nusselt number for small aspect ratio?

FIRST Step Consider the formula
NuL=(0.18(PrRaL0.2+Pr)0.29)
Next Step Substitute values of Variables
NuL=(0.18(0.70.350.2+0.7)0.29)
Next Step Prepare to Evaluate
NuL=(0.18(0.70.350.2+0.7)0.29)
Next Step Evaluate
NuL=0.123424205940313
LAST Step Rounding Answer
NuL=0.1234

Nusselt number for small aspect ratio Formula Elements

Variables
Nusselt Number(L) Based on Length
Nusselt Number(L) Based on Length is the ratio of convective to conductive heat transfer across a boundary.
Symbol: NuL
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
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.
Rayleigh Number Based on Length
Rayleigh Number Based on Length is a dimensionless parameter that is a measure of the instability of a layer of fluid due to differences of temperature and density at the top and bottom.
Symbol: RaL
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.

Other Formulas to find Nusselt Number(L) Based on Length

​Go Nusselt Number based on Length for Rectangular Cavities
NuL=0.069(RaL0.333)(Pr0.074)
​Go Nusselt number for medium aspect ratio
NuL=(0.22(PrRaL0.2+Pr)0.28)(hL)-0.25
​Go Nusselt number with large aspect ratio and lower RL
NuL=0.42(RaL0.25)(Pr0.012)(hL)-0.3
​Go Nusselt number with large aspect ratio and higher RL
NuL=0.046RaL0.333

Other formulas in Nusselt Number category

​Go Nusselt number for higher value of GrPr
NuavgL=0.59(GPr)0.25
​Go Nusselt number for all value of GrPr and constant heat flux
Nu=(0.825+(0.387((GPr)0.167)(1+(0.437Pr)0.5625)0.296))2
​Go Nusselt number for all value of GrPr and constant wall temperature
Nu=(0.825+(0.387((GPr)0.167)(1+(0.492Pr)0.5625)0.296))2
​Go Nusselt number for turbulent flow
Nu=0.10((GPr)0.333)

How to Evaluate Nusselt number for small aspect ratio?

Nusselt number for small aspect ratio evaluator uses Nusselt Number(L) Based on Length = (0.18*((Prandtl Number*Rayleigh Number Based on Length)/(0.2+Prandtl Number))^0.29) to evaluate the Nusselt Number(L) Based on Length, The Nusselt number for small aspect ratio formula is defined as the ratio of convective to conductive heat transfer across a boundary. Nusselt Number(L) Based on Length is denoted by NuL symbol.

How to evaluate Nusselt number for small aspect ratio using this online evaluator? To use this online evaluator for Nusselt number for small aspect ratio, enter Prandtl Number (Pr) & Rayleigh Number Based on Length (RaL) and hit the calculate button.

FAQs on Nusselt number for small aspect ratio

What is the formula to find Nusselt number for small aspect ratio?
The formula of Nusselt number for small aspect ratio is expressed as Nusselt Number(L) Based on Length = (0.18*((Prandtl Number*Rayleigh Number Based on Length)/(0.2+Prandtl Number))^0.29). Here is an example- 0.123424 = (0.18*((0.7*0.35)/(0.2+0.7))^0.29).
How to calculate Nusselt number for small aspect ratio?
With Prandtl Number (Pr) & Rayleigh Number Based on Length (RaL) we can find Nusselt number for small aspect ratio using the formula - Nusselt Number(L) Based on Length = (0.18*((Prandtl Number*Rayleigh Number Based on Length)/(0.2+Prandtl Number))^0.29).
What are the other ways to Calculate Nusselt Number(L) Based on Length?
Here are the different ways to Calculate Nusselt Number(L) Based on Length-
  • Nusselt Number(L) Based on Length=0.069*(Rayleigh Number Based on Length^0.333)*(Prandtl Number^0.074)OpenImg
  • Nusselt Number(L) Based on Length=(0.22*((Prandtl Number*Rayleigh Number Based on Length)/(0.2+Prandtl Number))^0.28)*(Height of Crack/Length)^-0.25OpenImg
  • Nusselt Number(L) Based on Length=0.42*(Rayleigh Number Based on Length^0.25)*(Prandtl Number^0.012)*(Height of Crack/Length)^-0.3OpenImg
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