Prandtlgetal
The Prandtl number, often abbreviated as Pr, is a dimensionless number 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 (nu) is the kinematic viscosity (momentum diffusivity) and α (alpha) is the thermal diffusivity. Kinematic viscosity
The Prandtl number helps to characterize the relative thickness of the hydrodynamic boundary layer and the
For liquids, the Prandtl number is typically much greater than 1, indicating that momentum diffuses much faster
The Prandtl number is a crucial parameter in heat transfer calculations, particularly in convection. It influences