elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Detached-Eddy Simulation of flow around a 1:5 rectangular cylinder

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).

Full text not available from this repository.

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/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Detached-Eddy Simulation of flow around a 1:5 rectangular cylinder
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mannini, ClaudioUniversity of FlorenceUNSPECIFIED
Soda, AnteUniversity of ZagrebUNSPECIFIED
Schewe, GünterUNSPECIFIEDUNSPECIFIED
Weinman, KeithUNSPECIFIEDUNSPECIFIED
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

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.