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Heat and Mass Transfer
Prandtl Number in Free convection 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.
Free convection formulas that make use of Prandtl Number
f
x
Nusselt number for higher value of GrPr
Go
f
x
Nusselt number for all value of GrPr and constant heat flux
Go
f
x
Nusselt number for all value of GrPr and constant wall temperature
Go
f
x
Nusselt number for turbulent flow
Go
f
x
Nusselt number for both constant wall temperature and heat flux
Go
f
x
Nusselt number for horizontal plate with upper surface heated or lower surface cooled
Go
f
x
Nusselt number for horizontal plate with constant wall temperature
Go
f
x
Nusselt number for horizontal plate with upper surface cooled or lower surface heated
Go
f
x
Nusselt number for horizontal cylinders
Go
f
x
Nusselt Number based on Diameter for Horizontal Cylinders
Go
f
x
Nusselt Number based on Diameter for Liquid Metals
Go
f
x
Nusselt number for sphere with Pr equal to 1
Go
f
x
Nusselt number for sphere
Go
f
x
Nusselt Number based on Length for Rectangular Cavities
Go
f
x
Nusselt number for medium aspect ratio
Go
f
x
Nusselt number for small aspect ratio
Go
f
x
Nusselt number with large aspect ratio and lower RL
Go
f
x
Nusselt Number based on Diameter for Horizontal Cylinders for Higher Ranges of GrPr
Go
f
x
Stanton number given Nusselt number and other dimensionless groups
Go
f
x
Nusselt number given Stanton number and other dimensionless groups
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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