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A multigrid method for steady euler equations on unstructured adaptive grids
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Dick, Erik Riemslagh Sr., Kris |
| Copyright Year | 1993 |
| Description | A flux-difference splitting type algorithm is formulated for the steady Euler equations on unstructured grids. The polynomial flux-difference splitting technique is used. A vertex-centered finite volume method is employed on a triangular mesh. The multigrid method is in defect-correction form. A relaxation procedure with a first order accurate inner iteration and a second-order correction performed only on the finest grid, is used. A multi-stage Jacobi relaxation method is employed as a smoother. Since the grid is unstructured a Jacobi type is chosen. The multi-staging is necessary to provide sufficient smoothing properties. The domain is discretized using a Delaunay triangular mesh generator. Three grids with more or less uniform distribution of nodes but with different resolution are generated by successive refinement of the coarsest grid. Nodes of coarser grids appear in the finer grids. The multigrid method is started on these grids. As soon as the residual drops below a threshold value, an adaptive refinement is started. The solution on the adaptively refined grid is accelerated by a multigrid procedure. The coarser multigrid grids are generated by successive coarsening through point removement. The adaption cycle is repeated a few times. Results are given for the transonic flow over a NACA-0012 airfoil. |
| File Size | 1051011 |
| Page Count | 16 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19940017003 |
| Archival Resource Key | ark:/13960/t4pk59k7k |
| Language | English |
| Publisher Date | 1993-11-01 |
| Access Restriction | Open |
| Subject Keyword | Numerical Analysis Relaxation Method Mathematics Transonic Flow Multigrid Methods Euler Equations of Motion Finite Volume Method Boundary Conditions Iteration Computational Grids Grid Generation Mathematics Flux Difference Splitting Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
