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Efficient fluid dynamic design optimization using cartesian grids
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Dadone, A. Sellers, Bill Technical Monitor Grossman, B. |
| Copyright Year | 2004 |
| Description | This report is subdivided in three parts. The first one reviews a new approach to the computation of inviscid flows using Cartesian grid methods. The crux of the method is the curvature-corrected symmetry technique (CCST) developed by the present authors for body-fitted grids. The method introduces ghost cells near the boundaries whose values are developed from an assumed flow-field model in vicinity of the wall consisting of a vortex flow, which satisfies the normal momentum equation and the non-penetration condition. The CCST boundary condition was shown to be substantially more accurate than traditional boundary condition approaches. This improved boundary condition is adapted to a Cartesian mesh formulation, which we call the Ghost Body-Cell Method (GBCM). In this approach, all cell centers exterior to the body are computed with fluxes at the four surrounding cell edges. There is no need for special treatment corresponding to cut cells which complicate other Cartesian mesh methods. |
| File Size | 942826 |
| Page Count | 49 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20050080747 |
| Archival Resource Key | ark:/13960/t02z66502 |
| Language | English |
| Publisher Date | 2004-12-01 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Thermodynamics Inviscid Flow Boundary Conditions Grid Refinement Mathematics Computational Fluid Dynamics Design Optimization Cartesian Coordinates 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 |
