@inproceedings{81dfe5f140284e8a86e212647230110d,
title = "Performance comparisons of parallel implicit solvers for hypersonic flow computations on unstructured meshes",
abstract = "A comparative study of time integration methods for the Navier-Stokes equations with chemistry is presented. A hybrid line-relaxation and point-relaxation implicit method is compared with a fully-coupled time integration method. The fully-coupled method makes use of the PETSc library and uses a Krylov method with an additive Schwarz method for parallel solutions. Computations are presented for a blunt-body flow over a range of Reynolds numbers, and results show that the hybrid line/point-relaxation and the fullycoupled methods both converge to steady state independent of the free-stream Reynolds number and grid stretching. The approximate hybrid method converges in less CPU time in this case. Memory usage and elapsed CPU time results are shown for perfect-gas and 11 species air chemistry calculations. The memory requirements triple when the fully-coupled method is used for both equation sets. Results also show that the fully-coupled method is superior to the approximate method when the flow is strongly anisotropic or when the mesh topology is not designed to take advantage of the hybrid method.",
author = "Ioannis Nompelis and Tian Wan and Candler, {Graham V.}",
year = "2007",
doi = "10.2514/6.2007-4334",
language = "English (US)",
isbn = "1563478994",
series = "Collection of Technical Papers - 18th AIAA Computational Fluid Dynamics Conference",
publisher = "American Institute of Aeronautics and Astronautics Inc.",
pages = "1616--1631",
booktitle = "Collection of Technical Papers - 18th AIAA Computational Fluid Dynamics Conference",
note = "18th AIAA Computational Fluid Dynamics Conference ; Conference date: 25-06-2007 Through 28-06-2007",
}