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Mass transfer to particles: Part I. Suspended in agitated tanks
Author(s) -
Harriott Peter
Publication year - 1962
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690080122
Subject(s) - mechanics , reynolds number , mass transfer , thermal diffusivity , thermodynamics , particle size , viscosity , particle density , mass transfer coefficient , chemistry , physics , volume (thermodynamics) , turbulence
Mass transfer coefficients were measured for particles suspended in agitated, baffled tanks. The coefficients for a given particle size and a given fluid vary with the 0.10 to 0.15 power of the power dissipated per unit volume. The coefficients, which cover a one hundred fold range, are about 1.5 to 8 times those predicted from the correlations for fixed particles if the terminal vilocity is used to calculate the particle Reynolds number. The measured effects of particle diameter, diffusivity, viscosity, and density difference cannot be described by a simple expenential equation or by previous empirical correlations. The effects of these variables can be explained by using a slip‐velocity theory combined with a modified penetration theory.