Upwind Relaxation Algorithm for Re-entry Nonequilibrium Flows

H.-H. Frühauf, M. Fertig, F. Olawsky and T. Bönisch
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H.-H. Frühauf: Universität Stuttgart, Institut für Raumfahrtsysteme
M. Fertig: Universität Stuttgart, Institut für Raumfahrtsysteme
F. Olawsky: Universität Stuttgart, Institut für Raumfahrtsysteme
T. Bönisch: Rechenzentrum der Universität Stuttgart

A chapter in High Performance Computing in Science and Engineering ’99, 2000, pp 365-378 from Springer

Abstract: Abstract The development of the Navier-Stokes solver URANUS (Upwind Relaxation Algorithm for Nonequilibrium Flows of the University of Stuttgart) will be described. Advanced gas-phase and gas-surface interaction modelings allow an accurate prediction of thermochemical relaxations in high-temperature nonequilibrium flows around re-entry vehicles and the associated aerothermal surface loads. A fully coupled, fully implicit numerical algorithm, which solves the Newton-linearized equation system iteratively with arbitrary accuracy allows for large CFL numbers. Therefore, Newton-like convergence rates and a sufficient convergence grade are obtained for accurate computation of sensitive flow quantities like skin friction coefficient and Stanton number. The favorable performance of the algorithm will be demonstrated for solutions of the 2D and 3D sequential nonequilibrium codes on NEC SX-4. Due to the large memory requirement and the large computational work of the 3D algorithm, a 3D Parallel-Multiblock version is developed which allows to compute nonequilibrium flows around re-entry vehicles with about one million mesh points on CRAY T3E to be computed.

Keywords: Surface Heat Flux; Skin Friction Coefficient; Collision Integral; Stanton Number; Mach Number Contour (search for similar items in EconPapers)
Date: 2000
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DOI: 10.1007/978-3-642-59686-5_34

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