Q1: Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the __________ number.

ANS:A - Sherwood

Corresponding to the Nusselt number in heat transfer, the dimensionless group in mass transfer is the Sherwood number. The Sherwood number (Sh) is a dimensionless group used in mass transfer to characterize the ratio of convective mass transfer to molecular mass transfer. It is analogous to the Nusselt number (Nu) in heat transfer. The Sherwood number can be expressed as: Sh=ℎ𝐿𝐷Sh=DhL​ Where:

• ℎh is the convective mass transfer coefficient,
• 𝐿L is a characteristic length (such as the distance over which mass transfer occurs),
• 𝐷D is the mass diffusivity of the fluid.