Semi-implicit Preconditioning for Wall-bounded Flow
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2004

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.

wall bounded flow

numerical method

compressible flow

LES

Författare

Christian Wollblad

Chalmers, Institutionen för termo- och fluiddynamik

Lars-Erik Eriksson

Chalmers, Institutionen för termo- och fluiddynamik

Lars Davidson

Chalmers, Institutionen för termo- och fluiddynamik

34th AIAA Fluid Dynamic Conference and Exhibit

Ämneskategorier

Strömningsmekanik och akustik