Prandtl number is given by

ANS:C -

The Prandtl number (𝑃𝑟Pr) is a dimensionless number used in heat transfer and fluid dynamics. It represents the ratio of momentum diffusivity to thermal diffusivity. The Prandtl number is given by: 𝑃𝑟=Momentum diffusivityThermal diffusivity=𝜇⋅𝑐𝑝𝑘Pr=Thermal diffusivityMomentum diffusivity​=kμ⋅cp​​ Where:

• 𝜇μ is the dynamic viscosity of the fluid,
• 𝑐𝑝cp​ is the specific heat at constant pressure of the fluid, and
• 𝑘k is the thermal conductivity of the fluid.