JD factor for mass transfer is a function of Reynolds number. Mass transfer by molecular diffusion from a single drop to surrounding still air is given by___________________?
Correct answer: A. Nsh = 2
- A. Nsh = 2
- B. Nst = 2
- C. Nsc = 2
- D. None of these
Explanation
For a spherical drop transferring mass by molecular diffusion into stagnant surroundings, the limiting Sherwood number is 2. This is the mass-transfer analogue of the purely diffusive transport around a sphere.
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