Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
On use of Large-Eddy Simulation and OpenFOAM for wind flow around bridge deck problems
Submission Author:
José Emanuel da Silva Montiel , SP
Co-Authors:
José Emanuel da Silva Montiel, Breno Tavares de Godoy, Amanda Sayuri Oizuni, Valentina Ferro Antunes de Oliveira, Cleberson Matos, Laís Corrêa, Fernando Kurokawa
Presenter: Cleberson Matos
doi://10.26678/ABCM.COBEM2023.COB2023-1420
Abstract
The computational techniques for fluid dynamics for the quantitative prediction of flow characteristics has become an important topic of research, given their practical interest in engineering applications. With the advance of computational technology, CFD (Computational Fluid Dynamics) simulation of numerous complex problems in various engineering areas, such as fluid-structure interaction, became possible. In this sense, this paper aims to study the using of the open source software OpenFOAM for simulations of wind flow around bridge decks through validation of the results provided by it. In this work, simulations of external flow around a bridge deck section were carried out using the software OpenFOAM and Large Eddy Simulation (LES) for turbulence modeling. As a result of the simulation, the aerodynamic coefficients, such as drag and lift, and Strouhal number, were obtained and their values were compared to reference values. Before study the flow around the bridge deck section and in order to validate the results provided by the code for a simpler case, the simulation of flow around a circular cylinder for Reynolds number Re = 1000 was also performed in OpenFOAM using LES turbulence model. The results obtained were compared to those found in the literature. For the simulation of the flow around a circular cylinder, a mesh convergence study was done seeking to find an appropriate mesh for this case. Both the results of the simulations, the external flow around a bridge deck section and the flow around a circular cylinder, have shown agreement with the benchmark results present in the literature. It was also possible to notice the importance of the mesh convergence study, as having an inadequate mesh leads to misleading results. Therefore, the software OpenFOAM combined with Large Eddy Simulation for turbulence modeling showed to be an effective tool for dealing with this kind of problem.
Keywords
Large Eddy Simulation, Computational fluid dynamics (CFD), Turbulence, Aerodynamics, Suspension Bridge
