What is prandtl number - Definition and Meaning
Prandtl Number :
Prandtl number Pr, is the ratio of momentum diffusivity ( kinematic viscosity ) to thermal diffusivity. It is a dimensionless number (i.e) a quantity without any dimension. The unit of kinematic viscosity is m2 / s.
Pr = v / α
Pr = Prandtl Number
v = Kinematic Viscosity
α = Thermal Diffusivity
Calculate Prandtl number of Mercury at 0oC which has kinematic viscosity (v) 1.526 m2/s and thermal diffusivity (α) 13.534 m2/s.
Pr = 1.526 / 13.534
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