Damköhler number I

Damköhler number I

[′däm‚kər·lər ¦nəm·bər ¦wən]
(physics)
A dimensionless number, equal to the ratio of the time it takes a fluid to flow some characteristic distance, to the time it takes some chemical reaction or other physical process to be completed. Symbolized Da I. Also known as Damköhler's ratio.