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Calculate Sherwood Number And Its Limiting Behavior

Question

Consider a liquid film of thickness L flowing down a vertical surface as shown in the figure below. The flow is laminar and fully developed. Beginning at x = 0, the liquid contacts a gas containing species A, which dissolves in the liquid and undergoes an irreversible reaction. The liquid-phase concentration of species A at the gas-liquid interface (y = 0) is a constant CA0. The solid wall is impermeable and unreactive.

  1. Assuming that the reaction is first order with rate constant k1, derive an expression for the liquid-phase. Sherwood number for species A, valid for large x. Examine the limiting behavior of ShA for slow and fast reactions.
  2. Repeat part (a) for a zeroth order reaction with rate k0 Falling liquid film, with absorption of species A from the gas.

 

Summary

The question belongs to Chemical Engineering and it discusses about calculating the Sherwood number and its limiting behaviour for slow and fast reactions.

Total Word Count 280

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