- Mass Transfer - Section 1
- Mass Transfer - Section 2
- Mass Transfer - Section 3
- Mass Transfer - Section 4
- Mass Transfer - Section 5
- Mass Transfer - Section 6
- Mass Transfer - Section 7
- Mass Transfer - Section 8
- Mass Transfer - Section 9
- Mass Transfer - Section 10
- Mass Transfer - Section 11
- Mass Transfer - Section 12
- Mass Transfer - Section 13
- Mass Transfer - Section 14


Mass Transfer - Engineering
Q1: In case of cooling towers, the ratio of the rates of heat and mass transfer is indicated by the __________ number.A Lewis
B Grashoff
C Sherwood
D none of these
ANS:A - Lewis The Lewis number (𝐿𝑒Le) is a dimensionless parameter used in the analysis of heat and mass transfer processes, particularly in situations where both heat and mass transfer occur simultaneously. It is defined as the ratio of thermal diffusivity (𝐷𝑇DT) to mass diffusivity (𝐷𝑀DM) of a fluid: 𝐿𝑒=𝐷𝑇𝐷𝑀Le=DMDT Here's a breakdown of its significance and application:
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