Karlovitz number
From CFD-Wiki
The Karlovitz number is used in turbulent combustion
and corresponds to the ratio of chemical time scale 
and smallest turbulent time scale 
(Kolmogorov)
If 
the chemical reactions occur
much faster than all turbulent scales. Turbulence do not alter the flame structure
and the chemical region is in laminar conditions.
The Karlovitz number is linked to the Damkohler number (
).
