# Karlovitz number

(Difference between revisions)
 Revision as of 17:02, 17 November 2005 (view source)Salva (Talk | contribs)← Older edit Revision as of 17:36, 17 November 2005 (view source)Salva (Talk | contribs) mNewer edit → Line 12: Line 12: The Karlovitz number is linked to the [[Damkholer number]] ($Da$). The Karlovitz number is linked to the [[Damkholer number]] ($Da$). - The product of both numbers is always greater than 1. + :$:[itex] - Da Ka > 1 + Ka = \frac{1}{Da (\eta)}$ [/itex] [[Category:Dimensionless parameters]] [[Category:Dimensionless parameters]]

## Revision as of 17:36, 17 November 2005

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 Damkholer number ($Da$).

$Ka = \frac{1}{Da (\eta)}$