{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Turbulence lecture 2 - Turbulence Lecture 2 Historical...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
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
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
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 - Batchelor, Taylor Townsend at Cambridge Caltech Johns-Hopkins – Corrsin 1958 Kraichnan (student of Einstein) Introduced a sophisticated ad-hoc theory on two-point correlation methods.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}