On the wake dynamics of an oscillating cylinder via proper orthogonal decomposition
The coherent structures and wake dynamics of a two-degree-of-freedom vibrating cylinder with a low mass ratio at Re=5300 are investigated by means of proper orthogonal decomposition (POD) of a numerical database generated using large-eddy simulations. Two different reduced velocities of U*=3.0 and U...
| Autores: | , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/372814 |
| Acceso en línea: | https://hdl.handle.net/2117/372814 https://dx.doi.org/10.3390/fluids7090292 |
| Access Level: | acceso abierto |
| Palabra clave: | Cylinders Wakes (Fluid dynamics) LES Two-degrees-of-freedom vibrating cylinder POD Coherent structures Cilindres Dinàmica de fluids Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids |
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| dc.title.none.fl_str_mv |
On the wake dynamics of an oscillating cylinder via proper orthogonal decomposition |
| title |
On the wake dynamics of an oscillating cylinder via proper orthogonal decomposition |
| spellingShingle |
On the wake dynamics of an oscillating cylinder via proper orthogonal decomposition Eiximeno Franch, Benet Cylinders Wakes (Fluid dynamics) LES Two-degrees-of-freedom vibrating cylinder POD Coherent structures Cilindres Dinàmica de fluids Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids |
| title_short |
On the wake dynamics of an oscillating cylinder via proper orthogonal decomposition |
| title_full |
On the wake dynamics of an oscillating cylinder via proper orthogonal decomposition |
| title_fullStr |
On the wake dynamics of an oscillating cylinder via proper orthogonal decomposition |
| title_full_unstemmed |
On the wake dynamics of an oscillating cylinder via proper orthogonal decomposition |
| title_sort |
On the wake dynamics of an oscillating cylinder via proper orthogonal decomposition |
| dc.creator.none.fl_str_mv |
Eiximeno Franch, Benet Miró Jané, Arnau|||0000-0002-2772-6050 Cajas García, Juan Carlos Lehmkuhl Barba, Oriol|||0000-0002-2670-1871 Rodríguez Pérez, Ivette María|||0000-0002-3749-277X |
| author |
Eiximeno Franch, Benet |
| author_facet |
Eiximeno Franch, Benet Miró Jané, Arnau|||0000-0002-2772-6050 Cajas García, Juan Carlos Lehmkuhl Barba, Oriol|||0000-0002-2670-1871 Rodríguez Pérez, Ivette María|||0000-0002-3749-277X |
| author_role |
author |
| author2 |
Miró Jané, Arnau|||0000-0002-2772-6050 Cajas García, Juan Carlos Lehmkuhl Barba, Oriol|||0000-0002-2670-1871 Rodríguez Pérez, Ivette María|||0000-0002-3749-277X |
| author2_role |
author author author author |
| dc.subject.none.fl_str_mv |
Cylinders Wakes (Fluid dynamics) LES Two-degrees-of-freedom vibrating cylinder POD Coherent structures Cilindres Dinàmica de fluids Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids |
| topic |
Cylinders Wakes (Fluid dynamics) LES Two-degrees-of-freedom vibrating cylinder POD Coherent structures Cilindres Dinàmica de fluids Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids |
| description |
The coherent structures and wake dynamics of a two-degree-of-freedom vibrating cylinder with a low mass ratio at Re=5300 are investigated by means of proper orthogonal decomposition (POD) of a numerical database generated using large-eddy simulations. Two different reduced velocities of U*=3.0 and U*=5.5, which correspond with the initial and super-upper branches, are considered. This is the first time that this kind of analysis is performed in this kind of system in order to understand the role of large coherent motions on the amplification of the forces. In both branches of response, almost 1000 non-correlated in-time velocity fields have been decomposed using the snapshot method. It is seen that a large number of modes is required to represent 95% of the turbulent kinetic energy of the flow, but the first two modes contain a large percentage of the energy as they represent the wake large-scale vortex tubes. The energy dispersion of the high-order modes is attributed to the cylinder movement in the inline and cross-stream directions. Substantially different POD modes have been found in the two branches. While the first six modes resemble those observed in the static cylinder or in the initial branch of a one-degree of freedom cylinder in the initial branch, the modes not only contain information about the wake vortexes in the super-upper branch but also about the formation of the 2T vortex pattern and the Taylor–Görtler structures. It is shown that the 2T vortex pattern is formed by the interplay between the Taylor–Görtler stream-wise vortical structures and the cylinder movement and is responsible for the increase in the lift force and larger elongation in the super-upper branch. |
| publishDate |
2022 |
| dc.date.none.fl_str_mv |
2022 2022-09-02 2022 2022-09-15 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 VoR http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2117/372814 https://dx.doi.org/10.3390/fluids7090292 |
| url |
https://hdl.handle.net/2117/372814 https://dx.doi.org/10.3390/fluids7090292 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.relation.none.fl_str_mv |
Agencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PID2020-116937RB-C21 ALGORITMOS DE INTELIGENCIA ARTIFICIAL Y COMPUTACION DE ALTAS PRESTACIONES PARA MODELADO DE TURBULENCIA, CONTROL DE FLUJO Y AEROACUSTICA. Agencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PID2020-116937RB-C22 TOWARDS REAL-TIME ACTUATION STRATEGIES FOR FLOW CONTROL AND NOISE REDUCTION IN AIRCRAFTS. European Commission http://doi.org/10.13039/100010661 Horizon 2020 Framework Programme 956104 CODA: Next generation of industrial aerodynamic simulation code |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
| dc.rights.openaire.fl_str_mv |
info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
open access http://purl.org/coar/access_right/c_abf2 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
application/pdf |
| dc.publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute (MDPI) |
| publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute (MDPI) |
| dc.source.none.fl_str_mv |
reponame:UPCommons. Portal del coneixement obert de la UPC instname:Universitat Politècnica de Catalunya (UPC) |
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Universitat Politècnica de Catalunya (UPC) |
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UPCommons. Portal del coneixement obert de la UPC |
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UPCommons. Portal del coneixement obert de la UPC |
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1869416607174885376 |
| spelling |
On the wake dynamics of an oscillating cylinder via proper orthogonal decompositionEiximeno Franch, BenetMiró Jané, Arnau|||0000-0002-2772-6050Cajas García, Juan CarlosLehmkuhl Barba, Oriol|||0000-0002-2670-1871Rodríguez Pérez, Ivette María|||0000-0002-3749-277XCylindersWakes (Fluid dynamics)LESTwo-degrees-of-freedom vibrating cylinderPODCoherent structuresCilindresDinàmica de fluidsÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluidsThe coherent structures and wake dynamics of a two-degree-of-freedom vibrating cylinder with a low mass ratio at Re=5300 are investigated by means of proper orthogonal decomposition (POD) of a numerical database generated using large-eddy simulations. Two different reduced velocities of U*=3.0 and U*=5.5, which correspond with the initial and super-upper branches, are considered. This is the first time that this kind of analysis is performed in this kind of system in order to understand the role of large coherent motions on the amplification of the forces. In both branches of response, almost 1000 non-correlated in-time velocity fields have been decomposed using the snapshot method. It is seen that a large number of modes is required to represent 95% of the turbulent kinetic energy of the flow, but the first two modes contain a large percentage of the energy as they represent the wake large-scale vortex tubes. The energy dispersion of the high-order modes is attributed to the cylinder movement in the inline and cross-stream directions. Substantially different POD modes have been found in the two branches. While the first six modes resemble those observed in the static cylinder or in the initial branch of a one-degree of freedom cylinder in the initial branch, the modes not only contain information about the wake vortexes in the super-upper branch but also about the formation of the 2T vortex pattern and the Taylor–Görtler structures. It is shown that the 2T vortex pattern is formed by the interplay between the Taylor–Görtler stream-wise vortical structures and the cylinder movement and is responsible for the increase in the lift force and larger elongation in the super-upper branch.This work has been partially financially supported by the Ministerio de Economía, Industria y Competitividad, Secretaría de Estado de Investigación, Desarrollo e Innovación, Spain (Ref. PID2020-116937RB-C21, PID2020-116937RB-C22), and by the European High-Performance Computing Joint Undertaking (JU) under grant agreement No 956104. The JU receives support from the European Union’s Horizon 2020 research and innovation programme and Spain, France, Germany. O. Lehmkuhl work is financed by a Ramón y Cajal postdoctoral contract by the Ministerio de Economía y Competitividad, Secretaría de Estado de Investigación, Desarrollo e Innovación, Spain (RYC2018-025949-I).Peer ReviewedMultidisciplinary Digital Publishing Institute (MDPI)20222022-09-0220222022-09-15journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/372814https://dx.doi.org/10.3390/fluids7090292reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengAgencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PID2020-116937RB-C21 ALGORITMOS DE INTELIGENCIA ARTIFICIAL Y COMPUTACION DE ALTAS PRESTACIONES PARA MODELADO DE TURBULENCIA, CONTROL DE FLUJO Y AEROACUSTICA.Agencia Estatal de Investigación http://doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020 PID2020-116937RB-C22 TOWARDS REAL-TIME ACTUATION STRATEGIES FOR FLOW CONTROL AND NOISE REDUCTION IN AIRCRAFTS.European Commission http://doi.org/10.13039/100010661 Horizon 2020 Framework Programme 956104 CODA: Next generation of industrial aerodynamic simulation codeopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3728142026-05-27T15:37:01Z |
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15,300719 |