Deryagin number

Deryagin number

[‚der·ē′ag·ən ‚nəm·bər]
(physics)
A dimensionless group equal to the ratio of the thickness of a film coating a liquid to the capillary length of the liquid. Symbolized De.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.