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Semi-implicit Preconditioning for Wall-bounded Flow

Christian Wollblad (Institutionen för termo- och fluiddynamik) ; Lars-Erik Eriksson (Institutionen för termo- och fluiddynamik) ; Lars Davidson (Institutionen för termo- och fluiddynamik)
34th AIAA Fluid Dynamic Conference and Exhibit (2004)
[Konferensbidrag, övrigt]

Large eddy simulations (LES) of high speed compressible viscous flow require high space resolution as well as short time steps if explicit time stepping is used. A semi-implicit preconditioning scheme specially suitable for wall-bounded flow is developed which, when combined with an explicit time stepping algorithm, makes much larger time steps possible than with the explicit scheme alone. The method is validated for developing turbulent channel flow and applied to a transonic flow with shock wave turbulent boundary layer interaction. In both cases, the computational time saved is measured. Finally possible developments of the method are discussed.

Nyckelord: compressible flow, LES, numerical method, wall bounded flow

Denna post skapades 2006-08-25.
CPL Pubid: 10181


Institutioner (Chalmers)

Institutionen för termo- och fluiddynamik (1989-2004)



Chalmers infrastruktur

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Large eddy simulation of transonic flow with shock wave/turbulent boundary layer interaction