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Mixing length equation for high schmidt number mass transfer at solid boundaries
Author(s) -
Grifoll J.,
Giralt Francesc
Publication year - 1987
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450650104
Subject(s) - schmidt number , mass transfer , mixing (physics) , mechanics , thermodynamics , constant (computer programming) , chemistry , materials science , physics , turbulence , reynolds number , quantum mechanics , computer science , programming language
A simple modification of the Van Driest damping factor for mixing length calculations of mass and/or heat transfer coefficients at solid boundaries is proposed to increase mass eddy diffusivities in the near‐wall region, without affecting velocity predictions. Calculated mass transfer rates with a constant Sc t = 0.85 are in good agreement with present and previous experimental results obtained in pipe and duct flows at high Schmidt numbers.