CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Wiki > Karlovitz number

Karlovitz number

From CFD-Wiki

(Difference between revisions)
Jump to: navigation, search
m
m (corrected spelling)
 
Line 11: Line 11:
and the chemical region is in laminar conditions.
and the chemical region is in laminar conditions.
-
The Karlovitz number is linked to the [[Damkholer number]] (<math> Da </math>).
+
The Karlovitz number is linked to the [[Damkohler number]] (<math> Da </math>).
:<math>
:<math>

Latest revision as of 11:13, 22 May 2010

The Karlovitz number is used in turbulent combustion and corresponds to the ratio of chemical time scale  \tau_c and smallest turbulent time scale  \tau_k (Kolmogorov)


Ka \equiv \frac{\tau_c}{\tau_k}

If  Ka << 1 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 ( Da ).


Ka = \frac{1}{Da (\eta)}
My wiki