INVESTIGADORES
ELASKAR sergio Amado
artículos
Título:
Further Applications of Scheme for Reducing Numerical viscosity: 3D Hypersonic Flow
Autor/es:
ELASKAR, SERGIO; FALCINELLI, OSCAR; TAMAGNO, JOSÉ; SALDÍA, JUAN
Revista:
Journal of Physics: Conference Series
Editorial:
IOP, Institute of Physics
Referencias:
Año: 2009
ISSN:
1742-6596
Resumen:
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A Total Variation Diminishing (TVD) scheme
implemented in a non structured finite volume formulation for solving the 3D
Euler equations is presented. To simultaneously, achieve adequate accuracy in
smooth flows, high resolution at flow discontinuities and to avoid spurious
oscillations, different flux limiter functions are applied in a wave-to-wave
basis. By appropriately using compressive limiter functions with waves of the
family two to four (linear waves), and diffusive limiter functions with waves of the
family one and five (non linear waves), important reductions of the numerical
viscosity can be achieved. This sort of adaptive scheme has satisfactorily been
applied to the shock tube problem and to the slip interface between two
parallel flows. It has also been used when computing the flow over a spherically
blunted bi-conic body at free stream Mach numbers varying from five to fifteen.
The results obtained with the blunted body are presented here, and they show
that the new adaptive scheme besides being less diffusive, it does not lose
robustness regarding other TVD methods.