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Multigrid acceleration and turbulence models for computations of 3d turbulent jets in crossflow
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Demuren, A. O. |
| Copyright Year | 1991 |
| Description | A multigrid method is presented for the calculation of three-dimensional turbulent jets in crossflow. Turbulence closure is achieved with either the standard k-epsilon model or a Reynolds Stress Model (RSM). Multigrid acceleration enables convergence rates which are far superior to that for a single grid method. With the k-epsilon model the rate approaches that for laminar flow, but with RSM it is somewhat slower. The increased stiffness of the system of equations in the latter may be responsible. Computed results with both turbulence models are compared with experimental data for a pair of opposed jets in crossflow. Both models yield reasonable agreement with mean flow velocity but RSM yields better prediction of the Reynolds stresses. |
| File Size | 936496 |
| Page Count | 26 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920009533 |
| Archival Resource Key | ark:/13960/t2x39pt3n |
| Language | English |
| Publisher Date | 1991-11-01 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Heat Transfer Reynolds Stress Stress Analysis Multigrid Methods Computational Fluid Dynamics Laminar Flow K-epsilon Turbulence Model Flow Velocity Computational Grids Turbulent Jets Cross Flow Convergence 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 |
