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Advanced k-epsilon modeling of heat transfer
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Ames, Forrest E. Kwon, Okey |
| Copyright Year | 1995 |
| Description | This report describes two approaches to low Reynolds-number k-epsilon turbulence modeling which formulate the eddy viscosity on the wall-normal component of turbulence and a length scale. The wall-normal component of turbulence is computed via integration of the energy spectrum based on the local dissipation rate and is bounded by the isotropic condition. The models account for the anisotropy of the dissipation and the reduced mixing length due to the high strain rates present in the near-wall region. The turbulent kinetic energy and its dissipation rate were computed from the k and epsilon transport equations of Durbin. The models were tested for a wide range of turbulent flows and proved to be superior to other k-epsilon models, especially for nonequilibrium anisotropic flows. For the prediction of airfoil heat transfer, the models included a set of empirical correlations for predicting laminar-turbulent transition and laminar heat transfer augmentation due to the presence of freestream turbulence. The predictions of surface heat transfer were generally satisfactory. |
| File Size | 5004499 |
| Page Count | 156 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19950025002 |
| Archival Resource Key | ark:/13960/t55f3rd2s |
| Language | English |
| Publisher Date | 1995-07-01 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Heat Transfer Low Reynolds Number Nonequilibrium Flow Turbulence Turbulent Flow Turbine Blades Computational Fluid Dynamics Mixing Length Flow Theory Eddy Viscosity Anisotropy Aerodynamic Heat Transfer Wall Flow K-epsilon Turbulence Model Kinetic Energy Boundary Layer Flow 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 |
