Coherent structure reflective turbulent viscous flow modeling
Abstract
Utilizing a multiple-element scale/coherence decomposition of the Navier-Stokes 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-scaled 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 utilizing perturbation theory. The resultant propagation, evolution (in the convected reference frame) and (statistical) occurrence of three-dimensional vertical instabilities are computed and compared to experimental data. Subsequently, coherent reflective turbulence models shall be constructed from this analysis.
- Publication:
-
Final Report
- Pub Date:
- December 1984
- Bibcode:
- 1984hgj..rept.....H
- Keywords:
-
- Mathematical Models;
- Shear Properties;
- Structural Analysis;
- Turbulent Flow;
- Wall Flow;
- Decomposition;
- Navier-Stokes Equation;
- Nonlinear Systems;
- Perturbation Theory;
- Turbulence;
- Turbulence Models;
- Viscous Flow;
- Walls;
- Fluid Mechanics and Heat Transfer