Turbulence lecture 2

Turbulence lecture 2 - Turbulence Lecture 2 Historical...

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Turbulence Lecture 2 Historical Progress Osborne Reynolds 1883 Observation of pipe flow “small” uD v laminar flow “large” uD v turbulent flow Reynolds introduced time averages u = U + u ' Velocity is mean plus turbulent fluctuation 1910-1925 Mixing Length Theories Prandtl and his student Von Karman (Germany) Karman came to Cal-Tech (Karman – Corrsin – Riley - Slinn) - Analogy of turbulent diffusion with molecular diffusion and the “eddy” viscosity. G.I. Taylor ~1935 Extended the statistical specification to correlations, spectra, etc. 1
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Considered an idealized flow, homogeneous, isotropic turbulence. Introduced Lab experiments as well 1938 Von Karman - Introduced Tensor notation. - Ideas of self-preservation – scale similarity. 1941 Kolmogorov – Russian - Greatest success in understanding turbulence. Theories of small scale structures: said that small scales don’t depend much on large scales. Mid 1940’s & 1950’s
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This note was uploaded on 06/07/2011 for the course EGM 6341 taught by Professor Mei during the Spring '09 term at University of Florida.

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Turbulence lecture 2 - Turbulence Lecture 2 Historical...

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