Effect of local grid refinement on performance of scale-resolving models for simulation of complex external flows
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,...
محفوظ في:
| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | |
| التنسيق: | article |
| منشور في: |
2019
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| الوصول للمادة أونلاين: | http://hdl.handle.net/10725/12939 https://doi.org/10.3390/aerospace6080086 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://www.mdpi.com/2226-4310/6/8/86 |
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| _version_ | 1864513490416304128 |
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| author | ElCheikh, Amne |
| author2 | ElKhoury, Michel |
| author2_role | author |
| author_facet | ElCheikh, Amne ElKhoury, Michel |
| author_role | author |
| dc.creator.none.fl_str_mv | ElCheikh, Amne ElKhoury, Michel |
| dc.date.none.fl_str_mv | 2019 2021-07-13T10:24:10Z 2021-07-13T10:24:10Z 2021-07-13 |
| dc.identifier.none.fl_str_mv | 2226-4310 http://hdl.handle.net/10725/12939 https://doi.org/10.3390/aerospace6080086 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. http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://www.mdpi.com/2226-4310/6/8/86 |
| dc.language.none.fl_str_mv | en |
| dc.relation.none.fl_str_mv | Aerospace |
| dc.rights.*.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.title.none.fl_str_mv | Effect of local grid refinement on performance of scale-resolving models for simulation of complex external flows |
| dc.type.none.fl_str_mv | Article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | 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). |
| eu_rights_str_mv | openAccess |
| format | article |
| id | LAURepo_907e0c3345e141a35e2fd937c58d4c4a |
| identifier_str_mv | 2226-4310 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. |
| language_invalid_str_mv | en |
| network_acronym_str | LAURepo |
| network_name_str | Lebanese American University repository |
| oai_identifier_str | oai:laur.lau.edu.lb:10725/12939 |
| publishDate | 2019 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Effect of local grid refinement on performance of scale-resolving models for simulation of complex external flowsElCheikh, AmneElKhoury, MichelNumerical 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).Published2021-07-13T10:24:10Z2021-07-13T10:24:10Z20192021-07-13Articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article2226-4310http://hdl.handle.net/10725/12939https://doi.org/10.3390/aerospace6080086ElCheikh, 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.http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.phphttps://www.mdpi.com/2226-4310/6/8/86enAerospaceinfo:eu-repo/semantics/openAccessoai:laur.lau.edu.lb:10725/129392021-11-01T13:44:33Z |
| spellingShingle | Effect of local grid refinement on performance of scale-resolving models for simulation of complex external flows ElCheikh, Amne |
| status_str | publishedVersion |
| title | Effect of local grid refinement on performance of scale-resolving models for simulation of complex external flows |
| title_full | Effect of local grid refinement on performance of scale-resolving models for simulation of complex external flows |
| title_fullStr | Effect of local grid refinement on performance of scale-resolving models for simulation of complex external flows |
| title_full_unstemmed | Effect of local grid refinement on performance of scale-resolving models for simulation of complex external flows |
| title_short | Effect of local grid refinement on performance of scale-resolving models for simulation of complex external flows |
| title_sort | Effect of local grid refinement on performance of scale-resolving models for simulation of complex external flows |
| url | http://hdl.handle.net/10725/12939 https://doi.org/10.3390/aerospace6080086 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://www.mdpi.com/2226-4310/6/8/86 |