Reliable and accurate prediction of three-dimensional separation in asymmetric diffusers using large-eddy simulation

Hayder Schneider*, Dominic Von Terzi, Hans Jörg Bauer, Wolfgang Rodi

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)


Large-eddy simulations (LES) and Reynolds-averaged Navier-Stokes (RANS) calculations of the flow in two asymmetric three-dimensional diffusers were performed. The setup was chosen to match an existing experiment with separation. Both diffusers possess the same expansion ratio but differ in performance. The aim of the present study is to find the least expensive method to reliably and with reasonable accuracy account for the impact of the change in geometry. RANS calculations failed to predict both the extent and location of the separation. In contrast, LES with wall-functions delivered results within the accuracy of the experimental data.

Original languageEnglish
Pages (from-to)311011-311017
Number of pages7
JournalJournal of Fluids Engineering, Transactions of the ASME
Issue number3
Publication statusPublished - 2010
Externally publishedYes

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