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in Mass Transfer by (37.1k points)
The solution for velocity, concentration and temperature boundary layers will be same if

(a) Prandtl number = Schmidt number= Lewis number

(b) Prandtl number = 2 Schmidt number= Lewis number

(c) Prandtl number = Schmidt number= 2 Lewis number

(d) 2 Prandtl number = Schmidt number= Lewis number

This question was addressed to me at a job interview.

The query is from Convective Mass Transfer in chapter Modes and Diffusion of Mass Transfer

1 Answer

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by (39.8k points)
The correct answer is (a) Prandtl number = Schmidt number= Lewis number

Explanation: All the three boundary layers must coincide.

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