Strouhal number
From Encyclopedia of Mathematics
A criterion for the similarity of non-stationary motions of liquids or gases. The Strouhal number characterizes the identity of the flow of the processes in the course of time:
![]() |
where is the typical velocity of the flow,
is the typical linear dimension,
is the typical period of time for non-stationary motion, and
is the typical frequency (the inverse quantity
is sometimes also denoted by Sh).
The same criterion in mechanical, thermal and electromagnetic processes is called the homochromity test.
The Strouhal number is named after V. Strouhal.
Comments
References
[a1] | L.I. Sedov, "Similarity and dimensional methods in mechanics" , Acad. Press (1959) (Translated from Russian) |
How to Cite This Entry:
Strouhal number. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Strouhal_number&oldid=33468
Strouhal number. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Strouhal_number&oldid=33468
This article was adapted from an original article by Material from the article "Strouhal number" in BSE-3 (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article