If the Prandtl number is greater than 1, the thermal boundary layer is thinner than the velocity boundary layer.
12.
It is related to the turbulent Prandtl number which is concerned with turbulent heat transfer rather than turbulent mass transfer.
13.
As such, the Prandtl number is often found in property tables alongside other properties such as viscosity and thermal conductivity.
14.
He found that for Prandtl number greater than 0.6, the thermal boundary layer thickness was approximately given by:
15.
As another example, a magnetic Prandtl number of order unity is a widely accepted value for the thin accretion discs.
16.
However, most flows in nature are turbulent rather than laminar and therefore incorporating the use of turbulent Prandtl Number becomes necessary.
17.
Plot showing the relative thickness in the Thermal boundary layer versus the Velocity boundary layer ( in red ) for various Prandtl Numbers.
18.
The simplest model for turbulent Prandtl Number is the Reynolds analogy, which yields a turbulent Prandtl number of unity however based on.
19.
The simplest model for turbulent Prandtl Number is the Reynolds analogy, which yields a turbulent Prandtl number of unity however based on.
20.
These correlations are the mass transfer analogies to heat transfer correlations of the Nusselt number in terms of the Reynolds number and Prandtl number.
