{"acknowledgement":"K.D.’s research was supported by an Australian Research Council Discovery Early Career\r\nResearcher Award (DE170100171). B.W., R.A., F.M. and A.M. research was supported by the Spanish Ministerio de Economía y Competitivdad (grant numbers FIS2016-77849-R and FIS2017-85794-P) and Ministerio de Ciencia e Innovación (grant number PID2020-114043GB-I00) and the Generalitat de Catalunya (grant 2017-SGR-785). B.W.’s research was also supported by the Chinese Scholarship Council (grant CSC no. 201806440152).","isi":1,"keyword":["Mechanical Engineering","Mechanics of Materials","Condensed Matter Physics","Applied Mathematics"],"volume":951,"intvolume":"       951","year":"2022","citation":{"ama":"Wang B, Ayats López R, Deguchi K, Mellibovsky F, Meseguer A. Self-sustainment of coherent structures in counter-rotating Taylor–Couette flow. <i>Journal of Fluid Mechanics</i>. 2022;951. doi:<a href=\"https://doi.org/10.1017/jfm.2022.828\">10.1017/jfm.2022.828</a>","chicago":"Wang, B., Roger Ayats López, K. Deguchi, F. Mellibovsky, and A. Meseguer. “Self-Sustainment of Coherent Structures in Counter-Rotating Taylor–Couette Flow.” <i>Journal of Fluid Mechanics</i>. Cambridge University Press, 2022. <a href=\"https://doi.org/10.1017/jfm.2022.828\">https://doi.org/10.1017/jfm.2022.828</a>.","apa":"Wang, B., Ayats López, R., Deguchi, K., Mellibovsky, F., &#38; Meseguer, A. (2022). Self-sustainment of coherent structures in counter-rotating Taylor–Couette flow. <i>Journal of Fluid Mechanics</i>. Cambridge University Press. <a href=\"https://doi.org/10.1017/jfm.2022.828\">https://doi.org/10.1017/jfm.2022.828</a>","ista":"Wang B, Ayats López R, Deguchi K, Mellibovsky F, Meseguer A. 2022. Self-sustainment of coherent structures in counter-rotating Taylor–Couette flow. Journal of Fluid Mechanics. 951, A21.","short":"B. Wang, R. Ayats López, K. Deguchi, F. Mellibovsky, A. Meseguer, Journal of Fluid Mechanics 951 (2022).","mla":"Wang, B., et al. “Self-Sustainment of Coherent Structures in Counter-Rotating Taylor–Couette Flow.” <i>Journal of Fluid Mechanics</i>, vol. 951, A21, Cambridge University Press, 2022, doi:<a href=\"https://doi.org/10.1017/jfm.2022.828\">10.1017/jfm.2022.828</a>.","ieee":"B. Wang, R. Ayats López, K. Deguchi, F. Mellibovsky, and A. Meseguer, “Self-sustainment of coherent structures in counter-rotating Taylor–Couette flow,” <i>Journal of Fluid Mechanics</i>, vol. 951. Cambridge University Press, 2022."},"article_type":"original","language":[{"iso":"eng"}],"article_number":"A21","_id":"12137","doi":"10.1017/jfm.2022.828","publication":"Journal of Fluid Mechanics","author":[{"full_name":"Wang, B.","first_name":"B.","last_name":"Wang"},{"last_name":"Ayats López","first_name":"Roger","full_name":"Ayats López, Roger","id":"ab77522d-073b-11ed-8aff-e71b39258362","orcid":"0000-0001-6572-0621"},{"last_name":"Deguchi","first_name":"K.","full_name":"Deguchi, K."},{"first_name":"F.","last_name":"Mellibovsky","full_name":"Mellibovsky, F."},{"first_name":"A.","last_name":"Meseguer","full_name":"Meseguer, A."}],"publication_identifier":{"eissn":["1469-7645"],"issn":["0022-1120"]},"external_id":{"arxiv":["2207.12990"],"isi":["000879446900001"]},"status":"public","title":"Self-sustainment of coherent structures in counter-rotating Taylor–Couette flow","quality_controlled":"1","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","date_created":"2023-01-12T12:04:17Z","oa":1,"oa_version":"Preprint","scopus_import":"1","publisher":"Cambridge University Press","date_published":"2022-11-07T00:00:00Z","publication_status":"published","abstract":[{"lang":"eng","text":"We investigate the local self-sustained process underlying spiral turbulence in counter-rotating Taylor–Couette flow using a periodic annular domain, shaped as a parallelogram, two of whose sides are aligned with the cylindrical helix described by the spiral pattern. The primary focus of the study is placed on the emergence of drifting–rotating waves (DRW) that capture, in a relatively small domain, the main features of coherent structures typically observed in developed turbulence. The transitional dynamics of the subcritical region, far below the first instability of the laminar circular Couette flow, is determined by the upper and lower branches of DRW solutions originated at saddle-node bifurcations. The mechanism whereby these solutions self-sustain, and the chaotic dynamics they induce, are conspicuously reminiscent of other subcritical shear flows. Remarkably, the flow properties of DRW persist even as the Reynolds number is increased beyond the linear stability threshold of the base flow. Simulations in a narrow parallelogram domain stretched in the azimuthal direction to revolve around the apparatus a full turn confirm that self-sustained vortices eventually concentrate into a localised pattern. The resulting statistical steady state satisfactorily reproduces qualitatively, and to a certain degree also quantitatively, the topology and properties of spiral turbulence as calculated in a large periodic domain of sufficient aspect ratio that is representative of the real system."}],"main_file_link":[{"url":" https://doi.org/10.48550/arXiv.2207.12990","open_access":"1"}],"department":[{"_id":"BjHo"}],"day":"07","type":"journal_article","date_updated":"2023-08-04T08:54:16Z","month":"11","article_processing_charge":"No"}