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Record Details

Record 77 of 977
Theoretical study of turbulent channel flow - Bulk properties, pressure fluctuations, and propagation of electromagnetic waves
Author and Affiliation:
Canuto, V. M.(NASA Goddard Inst. for Space Studies, New York, NY, United States)
Hartke, G. J.(NASA Goddard Inst. for Space Studies, New York, NY, United States)
Battaglia, A.(NASA Goddard Inst. for Space Studies, New York, NY, United States)
Chasnov, J.(NASA Goddard Institute for Space Studies, New York, United States)
Albrecht, G. F.(Lawrence Livermore National Laboratory, Livermore, CA, United States)
Abstract: In this paper, we apply two theoretical turbulence models, DIA and the recent GISS model, to study properties of a turbulent channel flow. Both models provide a turbulent kinetic energy spectral function E(k) as the solution of a non-linear equation; the two models employ the same source function but different closures. The source function is characterized by a rate n sub s (k) which is derived from the complex eigenvalues of the Orr-Sommerfeld (OS) equation in which the basic flow is taken to be of a Poiseuille type. The O-S equation is solved for a variety of Reynolds numbers corresponding to available experimental data. A physical argument is presented whereby the central line velocity characterizing the basic flow, U0 sup L, is not to be identified with the U0 appearing in the experimental Reynolds number. The theoretical results are compared with two types of experimental data: (1) turbulence bulk properties, and (2) properties that depend strongly on the structure of the turbulence spectrum at low wave numbers. The only existing analytical expression for Pi (k) cannot be used in the present case because it applies to the case of a flat plate, not a finite channel.
Publication Date: Feb 01, 1990
Document ID:
19900038532
(Acquired Nov 28, 1995)
Accession Number: 90A25587
Subject Category: FLUID MECHANICS AND HEAT TRANSFER
Document Type: Journal Article
Publication Information: Journal of Fluid Mechanics (ISSN 0022-1120); 211; 1-35
Publisher Information: United Kingdom
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Inst. for Space Studies; New York, NY, United States
Lawrence Livermore National Lab.; Livermore, CA, United States
Description: 35p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CHANNEL FLOW; FLOW VELOCITY; PRESSURE; SCATTERING; TURBULENT FLOW; WAVE PROPAGATION; KINETIC ENERGY; MATHEMATICAL MODELS; TURBULENCE MODELS; VARIATIONS
Imprint And Other Notes: Journal of Fluid Mechanics (ISSN 0022-1120), vol. 211, Feb. 1990, p. 1-35. Previously announced in STAR as N89-12830.
Miscellaneous Notes: Previously announced in STAR as N89-12830
Availability Source: Other Sources
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