Chi-Su Song* and Seung-O Park*
International Journal of Aeronautical and Space Sicences, vol. 8, no. 2, pp.1-10, 2007

Abstract : A two-dimensional backward facing step flow was computed using a Detached Eddy simulation (DES) based on the SST turbulence model. The expansion ratio (ER) was 1.125 and the Reynolds number based on the step height and the mean velocity in the upstream channel was 37,500. The flow condition was the same as with the experimental research [1]. The reattachment length, oscillatory characteristics of the flow and the coherent structures of the present simulation were compared to demonstrate the importance of spanwise grid spacing.

Keyword : Two-dimensional backward facing step flow, Hybrid RANS/LES, Detached Eddy Simulation, Spanwise grid spacing