FormulaDen logo
FormulaDen.com
Search
Physics Chemistry Math Chemical Engineering Civil Electrical Electronics Electronics and Instrumentation Materials Science Mechanical Production Engineering Financial Health
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=0.58⋅((Gre⋅Pre)0.2)
Nu - Nusselt Number?Gre - Grashof Number Property Elavated at Temperature?Pre - Prandtl Number(e) with Property Elevated at Te?

Nusselt number for heated surface down Example

With values
With units
Only example

Here is how the Nusselt number for heated surface down equation looks like with Values.

Here is how the Nusselt number for heated surface down equation looks like with Units.

Here is how the Nusselt number for heated surface down equation looks like.

0.3795Edit=0.58⋅((0.6Edit⋅0.2Edit)0.2)
Solution
Copy
Reset
Share
You are here -
HomeIcon Home » Category Physics » Category Mechanical » Category Heat and Mass Transfer » fx Nusselt number for heated surface down

Nusselt number for heated surface down Solution

Follow our step by step solution on how to calculate Nusselt number for heated surface down?

FIRST Step Consider the formula
Nu=0.58⋅((Gre⋅Pre)0.2)
Next Step Substitute values of Variables
∴ Nu=0.58⋅((0.6⋅0.2)0.2)
Next Step Prepare to Evaluate
∴ Nu=0.58⋅((0.6⋅0.2)0.2)
Next Step Evaluate
∴Nu=0.379545846165918
LAST Step Rounding Answer
∴Nu=0.3795

Nusselt number for heated surface down 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 NumberOpen Variable
Grashof Number Property Elavated at Temperature
Grashof Number Property Elavated at Temperature is a dimensionless number in fluid dynamics and heat transfer which approximates the ratio of the buoyancy to viscous force acting on a fluid.
Symbol: Gre
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Formulas to find Grashof Number Property Elavated at TemperatureOpen Variable
Prandtl Number(e) with Property Elevated at Te
Prandtl Number(e) with Property Elevated at Te is defined as the ratio of momentum diffusivity to thermal diffusivity.
Symbol: Pre
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Formulas to find Prandtl Number(e) with Property Elevated at TeOpen Variable

Other Formulas to find Nusselt Number

​Go Nusselt number for all value of GrPr and constant heat flux
Nu=(0.825+(0.387⋅((G⋅Pr)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⋅((G⋅Pr)0.167)(1+(0.492Pr)0.5625)0.296))2
​Go Nusselt number for turbulent flow
Nu=0.10⋅((G⋅Pr)0.333)
​Go Nusselt number for horizontal plate with upper surface heated or lower surface cooled
Nu=0.54⋅((G⋅Pr)0.25)

Other formulas in Nusselt Number category

​Go Nusselt number for higher value of GrPr
NuavgL=0.59⋅(G⋅Pr)0.25
​Go Nusselt number for both constant wall temperature and heat flux
Nux=0.17⋅((Grx⋅Nu⋅Pr)0.25)
​Go Nusselt number for horizontal cylinders
NuD=(0.60+(0.387⋅(GrD⋅Pr(1+(0.559Pr)0.5625)0.296)0.167))2
​Go Nusselt Number based on Diameter for Horizontal Cylinders
NuD=0.36+(0.518⋅((GrD⋅Pr)0.25)(1+(0.559Pr)0.5625)0.444)

How to Evaluate Nusselt number for heated surface down?

Nusselt number for heated surface down evaluator uses Nusselt Number = 0.58*((Grashof Number Property Elavated at Temperature*Prandtl Number(e) with Property Elevated at Te)^0.2) to evaluate the Nusselt Number, The Nusselt number for heated surface down formula is defined as the ratio of convective to conductive heat transfer across a boundary. Nusselt Number is denoted by Nu symbol.

How to evaluate Nusselt number for heated surface down using this online evaluator? To use this online evaluator for Nusselt number for heated surface down, enter Grashof Number Property Elavated at Temperature (Gre) & Prandtl Number(e) with Property Elevated at Te (Pre) and hit the calculate button.

FAQs on Nusselt number for heated surface down

What is the formula to find Nusselt number for heated surface down?
The formula of Nusselt number for heated surface down is expressed as Nusselt Number = 0.58*((Grashof Number Property Elavated at Temperature*Prandtl Number(e) with Property Elevated at Te)^0.2). Here is an example- 0.379546 = 0.58*((0.6*0.2)^0.2).
How to calculate Nusselt number for heated surface down?
With Grashof Number Property Elavated at Temperature (Gre) & Prandtl Number(e) with Property Elevated at Te (Pre) we can find Nusselt number for heated surface down using the formula - Nusselt Number = 0.58*((Grashof Number Property Elavated at Temperature*Prandtl Number(e) with Property Elevated at Te)^0.2).
What are the other ways to Calculate Nusselt Number?
Here are the different ways to Calculate Nusselt Number-
  • Nusselt Number=(0.825+((0.387*((Grashof Number*Prandtl Number)^0.167))/((1+(0.437/Prandtl Number)^0.5625)^0.296)))^2OpenImg
  • Nusselt Number=(0.825+((0.387*((Grashof Number*Prandtl Number)^0.167))/((1+(0.492/Prandtl Number)^0.5625)^0.296)))^2OpenImg
  • Nusselt Number=0.10*((Grashof Number*Prandtl Number)^0.333)OpenImg
About | Contact | Disclaimer | Terms | Privacy Policy
© 2024. Developed & Maintained by softUsvista Inc.
Copied!