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A new energy transfer model for turbulent free shear flow
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Liou, William W.-W. |
| Copyright Year | 1992 |
| Description | A new model for the energy transfer mechanism in the large-scale turbulent kinetic energy equation is proposed. An estimate of the characteristic length scale of the energy containing large structures is obtained from the wavelength associated with the structures predicted by a weakly nonlinear analysis for turbulent free shear flows. With the inclusion of the proposed energy transfer model, the weakly nonlinear wave models for the turbulent large-scale structures are self-contained and are likely to be independent flow geometries. The model is tested against a plane mixing layer. Reasonably good agreement is achieved. Finally, it is shown by using the Liapunov function method, the balance between the production and the drainage of the kinetic energy of the turbulent large-scale structures is asymptotically stable as their amplitude saturates. The saturation of the wave amplitude provides an alternative indicator for flow self-similarity. |
| File Size | 1525955 |
| Page Count | 13 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19930001266 |
| Archival Resource Key | ark:/13960/t9w140697 |
| Language | English |
| Publisher Date | 1992-09-01 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Heat Transfer Flow Stability Liapunov Functions Turbulence Turbulent Flow Shear Flow Nonlinearity Mathematical Models Flow Geometry Kinetic Energy Energy Transfer Mixing Layers Fluids Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
