Effect of local grid refinement on performance of scale-resolving models for simulation of complex external flows

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dc.contributor.author ElCheikh, Amne
dc.contributor.author ElKhoury, Michel
dc.date.accessioned 2021-07-13T10:24:10Z
dc.date.available 2021-07-13T10:24:10Z
dc.date.copyright 2019 en_US
dc.date.issued 2021-07-13
dc.identifier.issn 2226-4310 en_US
dc.identifier.uri http://hdl.handle.net/10725/12939
dc.description.abstract Numerical simulations are crucial for fast and accurate estimations of the flow characteristics in many engineering applications such as atmospheric boundary layers around buildings, external aerodynamics around vehicles, and pollutant dispersion. In the simulation of flow over urban-like obstacles, it is crucial to accurately resolve the flow characteristics with reasonable computational cost. Therefore, Large Eddy Simulations on non-uniform grids are usually employed. However, an undesirable accumulation of energy at grid-refinement interfaces was observed in previous studies using non-uniform grids. This phenomenon induced oscillations in the spanwise velocity component, mainly on fine-to-coarse grid interfaces. In this study, the two challenging test cases of flow over urban-like cubes and flow over a 3-D circular cylinder were simulated using three different scale-resolving turbulence models. Simulations were performed on uniform coarse and fine grids on one hand, and a non-uniform grid on the other, to assess the effect of mesh density and mesh interfaces on the models’ performance. Overall, the proposed One-Equation Scale-Adaptive Simulation (One-Equation SAS) showed the least deviation from the experimental results in both tested cases and on all grid sizes and types when compared to the Shear Stress Transport-Improved Delayed Detached Eddy Simulation (IDDES) and the Algebraic Wall-Modeled Large Eddy Simulation (WMLES). en_US
dc.language.iso en en_US
dc.title Effect of local grid refinement on performance of scale-resolving models for simulation of complex external flows en_US
dc.type Article en_US
dc.description.version Published en_US
dc.author.school SOE en_US
dc.author.idnumber 201705688 en_US
dc.author.idnumber 200403272 en_US
dc.author.department Industrial And Mechanical Engineering en_US
dc.relation.journal Aerospace en_US
dc.journal.volume 6 en_US
dc.journal.issue 8 en_US
dc.article.pages 86 en_US
dc.keywords Turbulence modeling en_US
dc.keywords RANS en_US
dc.keywords LES en_US
dc.keywords Urban environment en_US
dc.keywords CFD simulation scale resolving models en_US
dc.keywords External flows en_US
dc.keywords Grid refinement en_US
dc.identifier.doi https://doi.org/10.3390/aerospace6080086 en_US
dc.identifier.ctation ElCheikh, A., & ElKhoury, M. (2019). Effect of local grid refinement on performance of scale-resolving models for simulation of complex external flows. Aerospace, 6(8), 86. en_US
dc.author.email amne.elcheikh@lau.edu.lb en_US
dc.author.email mkhoury@lau.edu.lb en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url https://www.mdpi.com/2226-4310/6/8/86 en_US
dc.orcid.id https://orcid.org/0000-0003-0459-8145 en_US
dc.orcid.id https://orcid.org/0000-0002-2732-4190 en_US
dc.author.affiliation Lebanese American University en_US

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