Model-Invariant Hybrid LES-RANS Computation of Separated Flow Past Periodic Hills

  • Stephen WoodruffEmail author
Conference paper
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 130)


The requirement that physical quantities not vary with a hybrid LES-RANS model’s blending parameter imposes conditions on the computation that lead to better results across LES-RANS transitions. This promises to allow placement of those transitions so that LES is performed only where required by the physics, improving computational efficiency. The approach is applied to separated flow past periodic hills, where good predictions of separation-bubble size are seen due to the gradual, controlled, LES-RANS transition and the resulting enhanced near-wall eddy viscosity.


Eddy Viscosity Separation Bubble Reattachment Point RANS Model Free Shear Layer 
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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.NASA Langley Research CenterHamptonUSA

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