the others numbers being defined
as in [7]. Judat[8] has then shown that a monoparametric representation
of (kla)* versus (P/Vl)* is inadequate, and that only a -space
representation containing both dimensionless power per unit volume
and superficial gas velocity can satisfactorily correlate (kla)*.
This author has also put forward that another -space, containing
non intensive parameters (rotational impeller speed instead
of power per unit liquid volume) could be used to describe the
measures of (kla)*, but this i-space is larger than the previous one.
F