Efficient acceleration techniques typical of explicit steady-state solvers are extended to time-accurate calculations. Stability restrictions are greatly reduced by means of a fully implicit time discretization. A four-stage Runge-Kutta scheme with local time stepping, residual smoothing, and multigridding is used instead of traditional time-expensive factorizations. Some applications to natural and forced unsteady viscous flows show the capability of the procedure.
Multigrid Time-Accurate Integration of Navier–Stokes Equations / Arnone A.; Liou M. S.; Povinelli L. A.. - STAMPA. - (1993), pp. 1-8. (Intervento presentato al convegno 11th AIAA CFD Conference tenutosi a Orlando, FL, USA nel July).
Multigrid Time-Accurate Integration of Navier–Stokes Equations
ARNONE, ANDREA;
1993
Abstract
Efficient acceleration techniques typical of explicit steady-state solvers are extended to time-accurate calculations. Stability restrictions are greatly reduced by means of a fully implicit time discretization. A four-stage Runge-Kutta scheme with local time stepping, residual smoothing, and multigridding is used instead of traditional time-expensive factorizations. Some applications to natural and forced unsteady viscous flows show the capability of the procedure.
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