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Heat and Mass Transfer
Prandtl Number in External flow Formulas
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. And is denoted by Pr.
External flow formulas that make use of Prandtl Number
f
x
Thermal boundary layer thickness at distance X from leading edge
Go
f
x
Average temperature difference between plate and fluid
Go
f
x
Coefficient of friction given Stanton number
Go
f
x
Nusselt number for constant wall temperature
Go
f
x
Nusselt number if heating starts from distance Xo from leading edge
Go
f
x
Nusselt number for liquid metals and for silicones
Go
f
x
Nusselt number for liquid metals only
Go
f
x
Nusselt number for constant heat flux for external flow
Go
f
x
Nusselt number for liquid metals or for silicones
Go
f
x
Nusselt Number for Frame Module
Go
f
x
Nusselt number at distance x from leading edge
Go
f
x
Average Nusselt number upto length L given Reynolds number
Go
f
x
Nusselt Number at Distance X from Leading Edge by Analogy
Go
f
x
Nusselt Number based on Diameter
Go
f
x
Nusselt number for liquids and gases
Go
f
x
Nusselt number when property variation is larger due to temperature variation
Go
f
x
Nusselt number given dynamic viscosity
Go
f
x
Nusselt number for liquid metals and silicones
Go
f
x
Nusselt number for liquid metals and silicones with higher Reynolds number value
Go
f
x
Nusselt Number in Forced Convection for Cross Flow
Go
f
x
Nusselt Number for Liquids
Go
f
x
Nusselt number for liquids for external flow
Go
f
x
Nusselt number for oils and water
Go
f
x
Nusselt number for gases and liquids
Go
f
x
Nusselt number for falling liquid drops
Go
f
x
Nusselt number for liquid metals
Go
FAQ
What is the 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.
Can the Prandtl Number be negative?
{YesorNo}, the Prandtl Number, measured in {OutputVariableMeasurementName} {CanorCannot} be negative.
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