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Performance analysis of partially-averaged navier-stokes method for complex turbulent flows

B. Basara ; Sinisa Krajnovic (Institutionen för tillämpad mekanik, Strömningslära) ; Z. Pavlovic ; Per Ringqvist (Institutionen för tillämpad mekanik, Strömningslära)
6th AIAA Theoretical Fluid Mechanics Conference, Honolulu, 27 - 30 June 2011 (2011)
[Konferensbidrag, refereegranskat]

The paper evaluates the performance of the Partially-Averaged Navier-Stokes (PANS) method on complex industrial Computational Fluid Dynamics (CFD) applications. The PANS method changes seamlessly from Reynolds-Averaged Navier-Stokes (RANS) to the Direct Numerical Solution (DNS) of the Navier-Stokes equations and supports any filter width or scale resolution and therefore, it has potential to be efficient tool to solve large and complex applications on available computational resources. The PANS variant, which is used in the present study, is based on the RANS k-ε-ζ-f model (v2/k-f model). In the work presented here, the filter width is controlled by specifying one control parameter: unresolved-to-total ratios of kinetic energy fk. Furthermore, this parameter is defined based on the grid spacing. A dynamic update of fk at each computational point and at the end of every time step makes the computational procedure very simple and attractive for industrial CFD. The model's performance is shown for complex CFD cases: an external car aerodynamics, a train aerodynamics and engine intake ports.



Denna post skapades 2013-01-15. Senast ändrad 2014-09-29.
CPL Pubid: 170638

 

Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära (2005-2017)

Ämnesområden

Strömningsmekanik

Chalmers infrastruktur