Accession Number:

ADA175195

Title:

Coherent Structure-Reflective Turbulent Viscous Flow Modeling.

Descriptive Note:

Annual rept. Mar 85-Mar 86,

Corporate Author:

HOKENSON (GUSTAVE J) LOS ANGELES CA

Personal Author(s):

Report Date:

1986-05-01

Pagination or Media Count:

38.0

Abstract:

By using a mulitple-element scalecoherence decomposition of the Navier-Stoke equations, the essential characteristics of the large scale turbulent structure are computed in wall-bounded shear flows. The effect of small-scale turbulence structure is modeled and the large-scale turbulence structure is computed assuming weakly non-linear large-scale dynamics. The effects of large-scale non-linearity and the presence of wave-like elements in the flow are accounted for using perturbation theory. The resultant propagation, evolution in the convected reference frame and statistical occurrence of three-dimensional vortical instabilities are computed and compared to experimental data. Coherent structure reflective turbulence models will be constructed from this analysis.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE