Rayleigh Number

Last modified by

MichaelBartmess

on

Jul 24, 2020, 6:28:07 PM

Created by

MichaelBartmess

on

Aug 20, 2014, 7:17:23 PM

$Ra = (g * Delta rho * "L" ^3) / ( mu * alpha )$

$"Density Difference"$

$"Characteristic Length"$

$"Dynamic Viscosity"$

$"Thermal Diffusivity"$

Tags

UUID

56c84284-151c-11e3-8615-bc764e049c3d

The Rayleigh Number (Ra) is a measure of the strength of the conduction or convection as a mechanism for the transfer of energy. This equation is the same as the equation in Physics / Thermodynamics.

Conduction is the transfer of energy between objects that are in physical contact and convection is the transfer of energy between an object and its environment due to motion of fluids or gases.

The inputs to this equation are:

g = gravitational acceleration
rho = the density difference
mu = dynamic viscosity
L = length
alpha = thermal diffusivity

The output Rayleigh number is a dimensionless number

This equation, Rayleigh Number, references 1 page

Equations and Data Items

• Rayleigh Number (Thermodynamics) by MichaelBartmess

Comments
Attachments
Stats

No comments

No attachments

Last 12 Months

This site uses cookies to give you the best, most relevant experience. By continuing to browse the site you are agreeing to our use of cookies.

Rayleigh Number

Datasets

Equations and Data Items

Calculators

Equations and Data Items

Collections