Mannini, Claudio and Soda, Ante and Schewe, Günter and Weinman, Keith (2008) Detached-Eddy Simulation of flow around a 1:5 rectangular cylinder. In: Proceedings - BBAA VI. BBAA VI- 6th International Colloquium on Bluff Bodies Aerodynamics and Applications, 2008-07-20 - 2008 07-24, Milano, Italy (Europe).
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Abstract
This paper deals with the numerical simulation of the unsteady flow field around a 1:5 rectangular cylinder at zero flow incidence, low Mach number and high Reynolds number. The three-dimensional Detached-Eddy Simulation technique associated with the one-equation turbulence model of Spalart and Allmaras (SA-DES) is employed. This is a hybrid method which combines the RANS approach near the walls and the LES approach away from the walls. It is particularly useful in case high-Reynolds-number turbulent boundary layers have to be computed. 2-D and 3-D unsteady RANS simulations using the Spalart-Allmaras (SAE) and an Explicit Algebraic Reynolds Stress Model (LEA k-ω) are also proposed. Comparison with experiments shows that, while the URANS-SAE equations are not able to capture the unsteadiness of the flow, the 2-D URANS-LEA computation gives reasonable results, although the frequency of vortex shedding is slightly underestimated and the lift mean fluctuation is overestimated. No improvement is obtained by applying the URANS-LEA approach on the much more expensive 3-D mesh, since a nearly two-dimensional flow field is obtained. In contrast, the accuracy of the result can be enhanced by performing a 3-D SA-DES simulation, which allows to resolve much finer and three-dimensional vortical structures. The conclusions of this work confirm the interest for this hybrid non-zonal technique and encourage to apply it for even more challenging test case.
Item URL in elib: | https://elib.dlr.de/54902/ | |||||||||||||||
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Document Type: | Conference or Workshop Item (Speech, Paper) | |||||||||||||||
Title: | Detached-Eddy Simulation of flow around a 1:5 rectangular cylinder | |||||||||||||||
Authors: |
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Date: | 2008 | |||||||||||||||
Journal or Publication Title: | Proceedings - BBAA VI | |||||||||||||||
Open Access: | No | |||||||||||||||
Gold Open Access: | No | |||||||||||||||
In SCOPUS: | No | |||||||||||||||
In ISI Web of Science: | No | |||||||||||||||
Status: | Published | |||||||||||||||
Keywords: | rectangular cylinder, unsteady aerodynamics, computational fluid dynamics, turbulence modelling, DES | |||||||||||||||
Event Title: | BBAA VI- 6th International Colloquium on Bluff Bodies Aerodynamics and Applications | |||||||||||||||
Event Location: | Milano, Italy (Europe) | |||||||||||||||
Event Type: | international Conference | |||||||||||||||
Event Dates: | 2008-07-20 - 2008 07-24 | |||||||||||||||
Organizer: | Politecnico di Milano | |||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport (old) | |||||||||||||||
HGF - Program: | Aeronautics | |||||||||||||||
HGF - Program Themes: | Aircraft Research (old) | |||||||||||||||
DLR - Research area: | Aeronautics | |||||||||||||||
DLR - Program: | L AR - Aircraft Research | |||||||||||||||
DLR - Research theme (Project): | L - Flexible Aircraft (old) | |||||||||||||||
Location: | Göttingen | |||||||||||||||
Institutes and Institutions: | Institute of Aeroelasticity | |||||||||||||||
Deposited By: | Erdmann, Daniela | |||||||||||||||
Deposited On: | 19 Aug 2008 | |||||||||||||||
Last Modified: | 27 Apr 2009 15:08 |
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