Reliable and accurate prediction of three-dimensional separation in asymmetric diffusers using large-Eddy simulation / Hayder Schneider in Transactions of the ASME . Journal of fluids engineering, Vol. 132 N° 3 (Mars 2010)  

Public ISBD [article]  inTransactions of the ASME . Journal of fluids engineering > Vol. 132 N° 3 (Mars 2010) . - 07 p. Titre : Reliable and accurate prediction of three-dimensional separation in asymmetric diffusers using large-Eddy simulation Type de document : texte imprimé Auteurs : Hayder Schneider, Auteur ; Dominic von Terzi, Auteur ; Hans-Jörg Bauer, Auteur Année de publication : 2010 Article en page(s) : 07 p. Note générale : fluids engineering Langues : Anglais (eng) Mots-clés : asymmetric three-dimensional diffusers  large-eddy simulations Résumé : 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. DEWEY : 620.1 ISSN : 0098-2202 En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...] [article] Reliable and accurate prediction of three-dimensional separation in asymmetric diffusers using large-Eddy simulation [texte imprimé] / Hayder Schneider, Auteur ; Dominic von Terzi, Auteur ; Hans-Jörg Bauer, Auteur . - 2010 . - 07 p. fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 132 N° 3 (Mars 2010) . - 07 p. Mots-clés : asymmetric three-dimensional diffusers  large-eddy simulations Résumé : 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. DEWEY : 620.1 ISSN : 0098-2202 En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...]

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