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Heat and Mass Transfer
Prandtl Number in Flow inside tubes 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.
Flow inside tubes formulas that make use of Prandtl Number
f
x
Thermal entry length
Go
f
x
Diameter of thermal entry tube
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f
x
Nusselt number for hydrodynamic length fully developed and thermal length still developing
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f
x
Nusselt number for short lengths
Go
f
x
Nusselt number for simultaneous development of hydrodynamic and thermal layers
Go
f
x
Nusselt number for simultaneous development of hydrodynamic and thermal layers for liquids
Go
f
x
Nusselt number for short tube thermal development
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f
x
Stanton number for Colburn analogy
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f
x
Darcy friction factor for Colburn analogy
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f
x
Colburn's j-factor
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f
x
Nusselt Number by Sieder-Tate for Shorter Tubes
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f
x
Nusselt number at entrance region
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f
x
Nusselt number for Smooth tubes
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f
x
Stanton number at bulk temperature
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f
x
Friction factor for rough tube Colburn analogy
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f
x
Nusselt number for liquid metals at constant wall temperature
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f
x
Nusselt number for constant heat flux
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f
x
Nusselt number for smooth tubes and fully developed flow
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f
x
Nusselt Number given viscosity of fluid
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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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