Rayleigh Number in Free convection Formulas

Rayleigh Number 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. And is denoted by Ra_l.

Formulas to find Rayleigh Number in Free convection

fxRayleigh number based on length for annular space between concentric cylindersGo

Free convection formulas that make use of Rayleigh Number

fxRayleigh number based on turbulence for annular space between concentric cylindersGo

fxRayleigh number based on turbulence for concentric spheresGo

List of variables in Free convection formulas

fx Rayleigh Number(t) Go

fx Outer Diameter Go

fx Inner Diameter Go

fx Length Go

FAQ

What is the Rayleigh Number?

Rayleigh Number 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.

Can the Rayleigh Number be negative?

{YesorNo}, the Rayleigh Number, measured in {OutputVariableMeasurementName} {CanorCannot} be negative.

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