Prandtlnummer
Prandtl number, often abbreviated as Pr, is a dimensionless quantity used in fluid dynamics and heat transfer. It is defined as the ratio of momentum diffusivity to thermal diffusivity. Mathematically, it is expressed as Pr = ν/α, where ν is the kinematic viscosity and α is the thermal diffusivity.
The kinematic viscosity (ν) represents how easily momentum diffuses through a fluid, indicating its resistance to shear
The value of the Prandtl number provides insight into the relative thickness of the hydrodynamic boundary
Typical Prandtl numbers vary significantly across different substances. For gases like air, Pr is typically around