Unsteady RANS simulations of flow around a bridge section

Mannini, Claudio and Šoda, Ante and Voß, Ralph and Schewe, Guenter (2010) Unsteady RANS simulations of flow around a bridge section. = Unsteady RANS simulations of flow around a bridge section. Journal of Wind Engineering and Industrial Aerodynamics, 98 (12). pp. 742-753. ISSN 0167-6105. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q1 (2010). Točan broj autora: 4.

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Abstract

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. © 2010 Elsevier Ltd.

Item Type: Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian): Bluff body; Computational fluid; Reynolds number effects; Turbulence modelling; Unsteady aerodynamics; URANS; Aerodynamics; Computational fluid dynamics; Fluid dynamics; Navier Stokes equations; Reynolds number; Turbulence models; Two dimensional; Flow simulation
Subjects: TECHNICAL SCIENCE > Computing
TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 400 Department of IC Engines and Mechanical Handling Equipment
Indexed in Web of Science: Yes
Indexed in Current Contents: Yes
Citations JCR: 14 (29.6.2015.)
Quartiles: Q1 (2010)
Citations SCOPUS: 14 (29.6.2015.)
Date Deposited: 15 Apr 2015 12:53
Last Modified: 29 Jun 2015 07:44
URI: http://repozitorij.fsb.hr/id/eprint/3622

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