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Unsteady RANS simulations of flow around a bridge section

Mannini, Claudio and Soda, Ante and Voß, Ralph and Schewe, Günter (2010) Unsteady RANS simulations of flow around a bridge section. Journal of Wind Engineering and Industrial Aerodynamics, Volume 98 (Issue 12). Elsevier.

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Official URL: http://www.sciencedirect.com/science/journal/01676105/98/12


This paper presents the results of unsteady Reynolds-averaged Navier–Stokes (URANS) simulations of flow around a common bridge deck geometry. Computations are performed with a noncommercial unstructured flow solver using two-dimensional hybrid meshes with fine near-wall resolution. The influence of different simulation parameters (grid refinement, time-step size, turbulence modelling) is analyzed, in particular in order to obtain flow solutions independent of spatial and temporal discretization. Results given by a one-equation eddy-viscosity turbulence model and a two-equation explicit algebraic Reynolds stress model are compared. Despite the limits imposed by the URANS approach and the relatively inexpensive two-dimensional computations, satisfactory agreement is found with the experimentally measured forces and pressures. These simulations help to explain the discrepancy between the results of two wind-tunnel test campaigns and show the dramatic influence of non-perfectly sharp edges on the global flow field development. The capability of the numerical approach to capture complex Reynolds number effects is also discussed.

Item URL in elib:https://elib.dlr.de/73396/
Document Type:Article
Title:Unsteady RANS simulations of flow around a bridge section
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mannini, ClaudioCRIACIV / Department of Civil and Environmental Engineering, University of FlorenceUNSPECIFIED
Soda, AnteFaculty of Mechanical and Naval Engineering, University of ZagrebUNSPECIFIED
Voß, Ralphralph.voss (at) dlr.deUNSPECIFIED
Schewe, Günterguenter.schewe (at) dlr.deUNSPECIFIED
Date:December 2010
Journal or Publication Title:Journal of Wind Engineering and Industrial Aerodynamics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Volume:Volume 98
Stathopoulos, T.Dept. of Building, Civil and Environmental Engineering, Concordia University, 1455 boul de Maisonneuve O, Montréal, H3G 1M8, Canada
Keywords: bridges, bluff bodies, unsteady aerodynamics, computational fluid dynamics, turbulence modelling, URANS, Reynolds number effects
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: Erdmann, Daniela
Deposited On:13 Feb 2012 15:47
Last Modified:06 Sep 2019 15:28

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