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单词 strouhal
释义

Strouhaln.

/ˈstraʊəl//ˈstruːəl/
Etymology: < the name of Čeněk (or Vincent) Strouhal (1850–1922), Czech scientist.
Mechanics.
Strouhal number n. a dimensionless number used in the study of the vibrations produced in a body by a fluid flowing past it, defined as vd/u (or u/vd) where u is the fluid velocity, v the frequency of the vibration, and d the effective diameter of the body.
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the world > matter > physics > mechanics > types of motion > [noun] > vibration or oscillation > specific number used in specific analysis
Strouhal number1949
1949 Proc. Royal Soc. A. 198 175 The results are expressed in the form of Strouhal number: S(R) = fd/Uo, where R = Uod/v.
1975 Offshore Engineer Dec. 42/3 For an isolated stationary cylinder the Strouhal number is fairly constant for a wide range of Reynolds numbers.
This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018).
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n.1949
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