Simulated flow around a rectangular 5:1 cylinder: Spanwise discretisation effects and emerging flow features

Bruno, Luca; Coste, Nicolas; Fransos, Davide

doi:10.1016/j.jweia.2012.03.018

Cited by 73 publications

(45 citation statements)

References 29 publications

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“…They also investigated the relationships between vortex shedding and the instantaneous pressure fields and aerodynamic forces, identifying the dominant contribution to the lift force to be related to the mean pressure recovery region. As a continuation of the mentioned study, Bruno et al (2012) presented a systematic study on the spanwise length and spanwise grid density. The application of URANS simulations was shown to be sensitive enough to correctly model the effects of different Reynolds numbers over a fixed rectangular cross section (Mannini et al, 2010a).…”

Section: Introductionmentioning

confidence: 96%

Numerical simulations and experimental validations of force coefficients and flutter derivatives of a bridge deck

Šarkić

Höffer

Brčić

2015

Journal of Wind Engineering and Industrial Aerodynamics

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Section: Introductionmentioning

confidence: 96%

Numerical simulations and experimental validations of force coefficients and flutter derivatives of a bridge deck

Šarkić

Höffer

Brčić

2015

Journal of Wind Engineering and Industrial Aerodynamics

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“…The important effects of the spanwise extension of the computational domain were also discussed in [45] and [53]. Figures 15 and 16 show that, by increasing the spanwise period L, the correlation coefficient of pressures ρ p tends to decrease, as the influence of periodic boundary conditions is reduced and three-dimensional vortical structures are more free to develop.…”

Section: Three-dimensional Des Simulationsmentioning

confidence: 94%

Applicability of URANS and DES Simulations of Flow Past Rectangular Cylinders and Bridge Sections

Mannini

2015

Computation

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This paper discusses the results of computational fluid dynamics simulations carried out for rectangular cylinders with various side ratios of interest for many civil engineering structures. A bridge deck of common cross-section geometry was also considered. Unsteady Reynolds-averaged Navier-Stokes (URANS) equations were solved in conjunction with either an eddy viscosity or a linearized explicit algebraic Reynolds stress model. The analysis showed that for the case studies considered, the 2D URANS approach was able to give reasonable results if coupled with an advanced turbulence model and a suitable computational mesh. The simulations even reproduced, at least qualitatively, complex phenomena observed in the wind tunnel, such as Reynolds number effects for a sharp-edged geometry. The study focused both on stationary and harmonically oscillating bodies. For the latter, self-excited forces and flutter derivatives were calculated and compared to experimental data. In the particular case of a benchmark rectangular 5:1 cylinder, 3D detached eddy simulations were also carried out, highlighting the improvement in the accuracy of the results with respect to both 2D and 3D URANS calculations. All of the computations were performed with the Tau code, a non-commercial unstructured solver developed by the German Aerospace Center.

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“…General references describing this model are, for instance, Blazek (2005) or Sagaut (2001) who focuses on incompressible flows. Concerning the high computer cost associated with the method, some computer times are provided in Bruno et al (2012) for a static 5:1 rectangular cylinder when different space discretization is considered in the span-wise direction.…”

Section: The Choice Of Turbulence Modelmentioning

confidence: 99%

“…A detailed summary of the main contributions in the 1990s can be found in Shimada and Ishihara (2002). Some more recent references on static rectangular cylinders are Sohankar (2006), Kuroda, Tamura, and Suzuki (2007) and Sohankar (2012), along with the research carried out in the frame of the BARC (Benchmark on the Aerodynamics of a Rectangular 5:1 Cylinder) initiative such as Mannini, Soda, and Schewe (2011) and Bruno, Coste, and Fransos (2012). The current state of the art, shows that 3D LES (Large Eddy Simulation) or DES (Detached Eddy Simulation) are generally used in order to study the complex three-dimensional flow around static rectangular cross-sections both in isolation and in combination with other bluff bodies.…”

Section: Introductionmentioning

confidence: 99%

On the applicability of 2D URANS and SSTk-ωturbulence model to the fluid-structure interaction of rectangular cylinders

Nieto

Hargreaves

Owen

et al. 2015

Engineering Applications of Computational Fluid Mechanics

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In this work the practical applicability of a 2D URANS approach adopting a block structured mesh and Menter's SST k-ω turbulence model in fluid-structure interaction (FSI) problems is studied using as a test case a ratio B/H = 4 rectangular cylinder. The vortex-induced vibration (VIV) and torsional flutter phenomena are analyzed based on the computation of the out-of-phase and in-phase components of the forced frequency component of lift and moment coefficients when the section is forced to periodically oscillate both in heave and pitch degrees of freedom. Also the flutter derivatives are evaluated numerically from the same forced oscillation simulations. A good general agreement has been found with both experimental and numerical data reported in the literature. This highlights the benefits of this relatively simple and straightforward approach. These methods, once their feasibility has been checked, are ready to use in parametric design of bridge deck sections and, at a later stage, in the shape optimization of deck girders considering aeroelastic constraints.

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Simulated flow around a rectangular 5:1 cylinder: Spanwise discretisation effects and emerging flow features

Cited by 73 publications

References 29 publications

Numerical simulations and experimental validations of force coefficients and flutter derivatives of a bridge deck

Numerical simulations and experimental validations of force coefficients and flutter derivatives of a bridge deck

Applicability of URANS and DES Simulations of Flow Past Rectangular Cylinders and Bridge Sections

On the applicability of 2D URANS and SSTk-ωturbulence model to the fluid-structure interaction of rectangular cylinders

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