Most of them deal with the cases when the liquid phase is a
Newtonian fluid with low viscosities. From various sets of experiments
carried out at lab-scale and/or at larger scale, some empirical
correlations for kla are proposed, involving either dimensional or
dimensionless parameters. At present, the most frequently used
dimensional correlation remains the one of Van’t Riet [6] or some
variants in which the constant and exponents have been modified.
They are expressed such as:
kla
=
C
·
(Ug )C1 ·
P
Vl
C2
·
()C3 (1)
where the constant C is strongly affected by the geometrical parameters
of the agitation system, and is the Newtonian viscosity.
Garcia-Ochoa and Gomez [3] recently summarized the different
exponents associated with Eq. (1) that are available in the literature.