Schmidt number is given by

ANS:A -

The Schmidt number (Sc) is defined as the ratio of momentum diffusivity (kinematic viscosity) to mass diffusivity. It is commonly used in fluid mechanics and heat transfer to characterize the relative importance of momentum and mass transfer in a fluid flow. Mathematically, the Schmidt number (Sc) is given by: 𝑆𝑐=kinematic viscositymass diffusivitySc=mass diffusivitykinematic viscosity​ Or alternatively: 𝑆𝑐=𝜇𝜌𝐷Sc=ρDμ​ Where:

• 𝜇μ is the dynamic viscosity of the fluid,
• 𝜌ρ is the density of the fluid,
• 𝐷D is the mass diffusivity of the species being transported in the fluid.