DNS of three-dimensional separation in turbulent diffuser flows
Ohlsson J, Schlatter P, Fischer PF, Henningson DS (2009)
Publication Type: Conference contribution
Publication year: 2009
Publisher: Springer Science and Business Media Deutschland GmbH
Book Volume: 132
Pages Range: 641-644
Conference Proceedings Title: Springer Proceedings in Physics
Event location: Marburg, DEU
ISBN: 9783642030840
DOI: 10.1007/978-3-642-03085-7_154
Abstract
The spectral-element method (SEM), is a high-order numerical method with the ability to accurately simulate fluid flows in complex geometries. SEM has opened the possibility to study – in great detail – fluid phenomena known to be very sensitive to discretization errors, e.g. flows undergoing pressureinduced separation [4]. Recently, Cherry et al. [1] performed experiments using Magnetic Resonance Velocimetry (MRV) of turbulent diffuser flow exhibiting unsteady three-dimensional separation at Re = 10 000 based on bulk velocity and height of the inflow duct. Two geometries with different opening angles were investigated and it was found that the flow was extremely sensitive to slight changes in the geometrical setup. To understand this sensitivity and to analyze its causes, we present a direct numerical simulation (DNS) of one of these cases (denoted by “Diffuser 1“ in [1]) by means of the SEM. Here, we focus on careful analysis of mean flow results in order to assess the quality of the simulation data.
Authors with CRIS profile
Involved external institutions
Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH)
Sweden (SE)
Argonne National Laboratory
United States (USA) (US)
Sweden (SE)
Argonne National Laboratory
United States (USA) (US)
How to cite
APA:
Ohlsson, J., Schlatter, P., Fischer, P.F., & Henningson, D.S. (2009). DNS of three-dimensional separation in turbulent diffuser flows. In Bruno Eckhardt (Eds.), Springer Proceedings in Physics (pp. 641-644). Marburg, DEU: Springer Science and Business Media Deutschland GmbH.
MLA:
Ohlsson, Johan, et al. "DNS of three-dimensional separation in turbulent diffuser flows." Proceedings of the 12th EUROMECH European Turbulence Conference, ETC12 2009, Marburg, DEU Ed. Bruno Eckhardt, Springer Science and Business Media Deutschland GmbH, 2009. 641-644.
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