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Momentum and mass transfer by eddy diffusioin in a wetted-wall channel

✍ Scribed by A. M. Dhanak

Publisher
American Institute of Chemical Engineers
Year
1958
Tongue
English
Weight
821 KB
Volume
4
Category
Article
ISSN
0001-1541

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✦ Synopsis

Abstract

The role of eddy diffusion of mass (water vapor) and momentum was investigated in a specially devised wetted‐wall channel in which the rippling of the liquid film was eliminated. The experimental measurements of the turbulent exchange coefficients for mass and momentum transport were carried out in a fully developed turbulent flow of air within the range of Reynolds numbers of 8,00 to 160,000. A correlation with Reynollds number revealed an approximately linear relationship of the eddy diffusivties to Reynolds number revealed an approximately linear relationship of the eddy diffusivities to Reynolds number [Equation (4)]. From the hot‐wire measurements it was found that within the main protion of the turbulent core eddy diffusivities remained fairly constant.

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