dynamical similarity

dynamical similarity

[dī¦nam·ə·kəl sim·ə′lar·əd·ē]
(mechanics)
Two flow fields are dynamically similar if one can be transformed into the other by a change of length and velocity scales. All dimensionless numbers of the flows must be the same.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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