[{"external_id":{"isi":["001406914100001"],"pmid":["39868426"]},"citation":{"ieee":"F. Parrella, S. Brizzolara, M. Holzner, and D. M. Mitrano, “Microplastics settling in turbid water: Impacts of sediments-induced flow patterns on particle deposition rates,” <i>Environmental Science and Technology</i>, vol. 59, no. 4. American Chemical Society, pp. 2257–2265, 2025.","chicago":"Parrella, Francesco, Stefano Brizzolara, Markus Holzner, and Denise M. Mitrano. “Microplastics Settling in Turbid Water: Impacts of Sediments-Induced Flow Patterns on Particle Deposition Rates.” <i>Environmental Science and Technology</i>. American Chemical Society, 2025. <a href=\"https://doi.org/10.1021/acs.est.4c10551\">https://doi.org/10.1021/acs.est.4c10551</a>.","short":"F. Parrella, S. Brizzolara, M. Holzner, D.M. Mitrano, Environmental Science and Technology 59 (2025) 2257–2265.","mla":"Parrella, Francesco, et al. “Microplastics Settling in Turbid Water: Impacts of Sediments-Induced Flow Patterns on Particle Deposition Rates.” <i>Environmental Science and Technology</i>, vol. 59, no. 4, American Chemical Society, 2025, pp. 2257–65, doi:<a href=\"https://doi.org/10.1021/acs.est.4c10551\">10.1021/acs.est.4c10551</a>.","ista":"Parrella F, Brizzolara S, Holzner M, Mitrano DM. 2025. Microplastics settling in turbid water: Impacts of sediments-induced flow patterns on particle deposition rates. Environmental Science and Technology. 59(4), 2257–2265.","ama":"Parrella F, Brizzolara S, Holzner M, Mitrano DM. Microplastics settling in turbid water: Impacts of sediments-induced flow patterns on particle deposition rates. <i>Environmental Science and Technology</i>. 2025;59(4):2257-2265. doi:<a href=\"https://doi.org/10.1021/acs.est.4c10551\">10.1021/acs.est.4c10551</a>","apa":"Parrella, F., Brizzolara, S., Holzner, M., &#38; Mitrano, D. M. (2025). Microplastics settling in turbid water: Impacts of sediments-induced flow patterns on particle deposition rates. <i>Environmental Science and Technology</i>. American Chemical Society. <a href=\"https://doi.org/10.1021/acs.est.4c10551\">https://doi.org/10.1021/acs.est.4c10551</a>"},"year":"2025","month":"01","publication":"Environmental Science and Technology","doi":"10.1021/acs.est.4c10551","status":"public","publication_status":"published","date_updated":"2025-09-30T10:27:26Z","day":"27","article_processing_charge":"No","volume":59,"oa_version":"None","OA_type":"closed access","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","publisher":"American Chemical Society","article_type":"original","isi":1,"pmid":1,"date_published":"2025-01-27T00:00:00Z","page":"2257-2265","intvolume":"        59","_id":"19015","scopus_import":"1","issue":"4","date_created":"2025-02-09T23:01:50Z","acknowledgement":"F.P. and D.M.M. were funded through the Swiss National Science Foundation (grant number PCEFP2_186856).","language":[{"iso":"eng"}],"title":"Microplastics settling in turbid water: Impacts of sediments-induced flow patterns on particle deposition rates","publication_identifier":{"issn":["0013-936X"],"eissn":["1520-5851"]},"type":"journal_article","abstract":[{"lang":"eng","text":"When microplastics (MPs) enter water bodies, they undergo various transport processes, including sedimentation, which can be influenced by factors such as particle size, density, and interactions with other particles. Surface waters contain suspended natural particles (e.g., clay and silt), which may impact MP settling rates. Here, we investigated how the presence of suspended sediments (SS) influenced the deposition patterns and rates of MPs in turbid waters. We systematically analyzed the settling velocities of particles, including different MP sizes and SS concentrations, in a plexiglass column with a camera array. For each experimental variant, we collected data on thousands of individual MPs, strengthening the statistical analysis of the particles’ velocities. Simultaneous measurements of the SS flow and MPs trajectories revealed that the SS induced complex flow patterns, with MPs spending more time in downwelling flow regions, thereby accelerating MPs sedimentation. This effect was more pronounced when SS were aggregated. Additionally, we found that smaller MP fragments were more affected by the fluctuations than spheres or larger fragments. Collectively, our results provide valuable data for future MP fate models and help to understand the sedimentation processes of MPs in natural waters, which is crucial for assessing their environmental transport and impact."}],"quality_controlled":"1","department":[{"_id":"BjHo"}],"author":[{"full_name":"Parrella, Francesco","first_name":"Francesco","last_name":"Parrella"},{"full_name":"Brizzolara, Stefano","id":"4bbe33b8-c59a-11ee-a1af-fa33d1ac42c4","first_name":"Stefano","last_name":"Brizzolara"},{"full_name":"Holzner, Markus","first_name":"Markus","last_name":"Holzner"},{"first_name":"Denise M.","last_name":"Mitrano","full_name":"Mitrano, Denise M."}]},{"publication":"Computers & Fluids","month":"03","external_id":{"isi":["001423607400001"]},"citation":{"ieee":"M. M. Neamtu-Halic, S. Brizzolara, G. Haller, and M. Holzner, “Unsupervised extraction of rotational Lagrangian coherent structures,” <i>Computers &#38; Fluids</i>, vol. 290. Elsevier, 2025.","chicago":"Neamtu-Halic, Marius M., Stefano Brizzolara, George Haller, and Markus Holzner. “Unsupervised Extraction of Rotational Lagrangian Coherent Structures.” <i>Computers &#38; Fluids</i>. Elsevier, 2025. <a href=\"https://doi.org/10.1016/j.compfluid.2025.106558\">https://doi.org/10.1016/j.compfluid.2025.106558</a>.","ista":"Neamtu-Halic MM, Brizzolara S, Haller G, Holzner M. 2025. Unsupervised extraction of rotational Lagrangian coherent structures. Computers &#38; Fluids. 290, 106558.","short":"M.M. Neamtu-Halic, S. Brizzolara, G. Haller, M. Holzner, Computers &#38; Fluids 290 (2025).","mla":"Neamtu-Halic, Marius M., et al. “Unsupervised Extraction of Rotational Lagrangian Coherent Structures.” <i>Computers &#38; Fluids</i>, vol. 290, 106558, Elsevier, 2025, doi:<a href=\"https://doi.org/10.1016/j.compfluid.2025.106558\">10.1016/j.compfluid.2025.106558</a>.","apa":"Neamtu-Halic, M. M., Brizzolara, S., Haller, G., &#38; Holzner, M. (2025). Unsupervised extraction of rotational Lagrangian coherent structures. <i>Computers &#38; Fluids</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.compfluid.2025.106558\">https://doi.org/10.1016/j.compfluid.2025.106558</a>","ama":"Neamtu-Halic MM, Brizzolara S, Haller G, Holzner M. Unsupervised extraction of rotational Lagrangian coherent structures. <i>Computers &#38; Fluids</i>. 2025;290. doi:<a href=\"https://doi.org/10.1016/j.compfluid.2025.106558\">10.1016/j.compfluid.2025.106558</a>"},"year":"2025","day":"01","article_processing_charge":"No","volume":290,"oa_version":"None","OA_type":"closed access","doi":"10.1016/j.compfluid.2025.106558","status":"public","publication_status":"published","date_updated":"2025-09-30T10:34:32Z","article_number":"106558","_id":"19035","intvolume":"       290","date_published":"2025-03-01T00:00:00Z","acknowledgement":"M.M.N.H. and M.H. acknowledge financial support from SNSF grant number 200727. M.H. and S.B. acknowledge financial support from the DFG priority program SPP 1881 Turbulent Superstructures under Grant No. HO5519/1-2.","language":[{"iso":"eng"}],"scopus_import":"1","date_created":"2025-02-17T09:18:41Z","article_type":"original","publisher":"Elsevier","isi":1,"user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","abstract":[{"text":"Lagrangian coherent structures (LCSs) are widely recognized as playing a significant role in turbulence dynamics since they can control the transport of mass, momentum or heat. However, the methods used to identify these structures are often based on ambiguous definitions and arbitrary thresholding. While LCSs theory provides precise and frame-indifferent mathematical definitions of coherent structures, some of the commonly used extraction algorithms employed in the literature are still case-specific and involve user-defined parameters. In this study, we present a new, unsupervised extraction algorithm that enables the extraction of rotational LCSs based on Lagrangian average vorticity deviation from an arbitrary 3D velocity field. The algorithm utilizes two alternative methods for the identification of the LCS core (ridge): an unsupervised clustering method and a streamline-based method. In a subsequent step, the ridge curve is parametrized through a pruning procedure of minimum spanning tree graphs. To assess the effectiveness of the algorithm, we test it on two cases: (i) direct numerical simulations of forced homogeneous and isotropic turbulence and (ii) three-dimensional Particle Tracking Velocimetry experiments of a turbulent gravity current.","lang":"eng"}],"quality_controlled":"1","author":[{"full_name":"Neamtu-Halic, Marius M.","last_name":"Neamtu-Halic","first_name":"Marius M."},{"last_name":"Brizzolara","first_name":"Stefano","id":"4bbe33b8-c59a-11ee-a1af-fa33d1ac42c4","full_name":"Brizzolara, Stefano"},{"full_name":"Haller, George","last_name":"Haller","first_name":"George"},{"full_name":"Holzner, Markus","first_name":"Markus","last_name":"Holzner"}],"department":[{"_id":"BjHo"}],"title":"Unsupervised extraction of rotational Lagrangian coherent structures","related_material":{"link":[{"relation":"software","url":"https://github.com/NeamtuMarius/Unsupervised-3D-LAVD-Extraction-Algorithm"}]},"publication_identifier":{"issn":["0045-7930"]},"type":"journal_article"},{"year":"2025","citation":{"ieee":"A. De Leo, S. Brizzolara, M. Cavaiola, J. He, and A. Stocchino, “Rigid fibre transport in a periodic non-homogeneous geophysical turbulent flow,” <i>Journal of Fluid Mechanics</i>, vol. 1011. Cambridge University Press, 2025.","short":"A. De Leo, S. Brizzolara, M. Cavaiola, J. He, A. Stocchino, Journal of Fluid Mechanics 1011 (2025).","ista":"De Leo A, Brizzolara S, Cavaiola M, He J, Stocchino A. 2025. Rigid fibre transport in a periodic non-homogeneous geophysical turbulent flow. Journal of Fluid Mechanics. 1011, A5.","mla":"De Leo, Annalisa, et al. “Rigid Fibre Transport in a Periodic Non-Homogeneous Geophysical Turbulent Flow.” <i>Journal of Fluid Mechanics</i>, vol. 1011, A5, Cambridge University Press, 2025, doi:<a href=\"https://doi.org/10.1017/jfm.2025.362\">10.1017/jfm.2025.362</a>.","chicago":"De Leo, Annalisa, Stefano Brizzolara, Mattia Cavaiola, Junlin He, and Alessandro Stocchino. “Rigid Fibre Transport in a Periodic Non-Homogeneous Geophysical Turbulent Flow.” <i>Journal of Fluid Mechanics</i>. Cambridge University Press, 2025. <a href=\"https://doi.org/10.1017/jfm.2025.362\">https://doi.org/10.1017/jfm.2025.362</a>.","ama":"De Leo A, Brizzolara S, Cavaiola M, He J, Stocchino A. Rigid fibre transport in a periodic non-homogeneous geophysical turbulent flow. <i>Journal of Fluid Mechanics</i>. 2025;1011. doi:<a href=\"https://doi.org/10.1017/jfm.2025.362\">10.1017/jfm.2025.362</a>","apa":"De Leo, A., Brizzolara, S., Cavaiola, M., He, J., &#38; Stocchino, A. (2025). Rigid fibre transport in a periodic non-homogeneous geophysical turbulent flow. <i>Journal of Fluid Mechanics</i>. Cambridge University Press. <a href=\"https://doi.org/10.1017/jfm.2025.362\">https://doi.org/10.1017/jfm.2025.362</a>"},"external_id":{"isi":["001489159700001"]},"has_accepted_license":"1","publication":"Journal of Fluid Mechanics","month":"05","ec_funded":1,"date_updated":"2025-09-30T12:38:34Z","status":"public","publication_status":"published","doi":"10.1017/jfm.2025.362","ddc":["530"],"OA_type":"hybrid","oa_version":"Published Version","oa":1,"file_date_updated":"2025-05-28T08:12:07Z","project":[{"name":"IST-BRIDGE: International postdoctoral program","_id":"fc2ed2f7-9c52-11eb-aca3-c01059dda49c","call_identifier":"H2020","grant_number":"101034413"}],"file":[{"creator":"dernst","date_updated":"2025-05-28T08:12:07Z","file_size":6415303,"content_type":"application/pdf","date_created":"2025-05-28T08:12:07Z","success":1,"file_name":"2025_JourFluidMech_DeLeo.pdf","file_id":"19751","checksum":"f1b0f6a977fdf2d6eb9e16c11d030c0c","access_level":"open_access","relation":"main_file"}],"volume":1011,"article_processing_charge":"No","day":"16","isi":1,"article_type":"original","publisher":"Cambridge University Press","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","language":[{"iso":"eng"}],"acknowledgement":"A.S. expresses thanks for support from the Research Grants Council of Hong Kong (project IDs 15216422 and C5032-22EF) and from the Research Institute for Land and Space (RILS) (project ID P0049622). S.B. is funded by the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement (no.101034413).","date_created":"2025-05-25T22:16:46Z","OA_place":"publisher","scopus_import":"1","_id":"19729","intvolume":"      1011","article_number":"A5","date_published":"2025-05-16T00:00:00Z","type":"journal_article","publication_identifier":{"issn":["0022-1120"],"eissn":["1469-7645"]},"title":"Rigid fibre transport in a periodic non-homogeneous geophysical turbulent flow","author":[{"full_name":"De Leo, Annalisa","last_name":"De Leo","first_name":"Annalisa"},{"full_name":"Brizzolara, Stefano","last_name":"Brizzolara","first_name":"Stefano","id":"4bbe33b8-c59a-11ee-a1af-fa33d1ac42c4"},{"full_name":"Cavaiola, Mattia","first_name":"Mattia","last_name":"Cavaiola"},{"full_name":"He, Junlin","first_name":"Junlin","last_name":"He"},{"last_name":"Stocchino","first_name":"Alessandro","full_name":"Stocchino, Alessandro"}],"tmp":{"short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"department":[{"_id":"BjHo"}],"quality_controlled":"1","abstract":[{"lang":"eng","text":"From anthropogenic litter carried by ocean currents to plant stems travelling through the atmosphere, geophysical flows are often seeded with elongated, fibre-like particles. In this study, we used a large-scale laboratory model of a tidal current – representative of a widespread class of geophysical flows – to investigate the tumbling motion of long, slender and floating fibres in the complex turbulence generated by flow interactions with a tidal inlet. Despite the non-stationary, non-homogeneous and anisotropic nature of this turbulence, we find that long fibres statistically rotate at the same frequency as eddies of similar size, a phenomenon called scale selection, which is known to occur in ideal turbulence. Furthermore, we report that the signal of the instantaneous transverse velocity difference between the fibre ends changes significantly from the signal produced by the flow in the fibre surroundings, although the two are statistically equivalent. These observations have twofold implications. On the one hand, they confirm the reliability of using the end-to-end velocity signal of rigid fibres to probe the two-point transverse statistics of the flow, even under realistic conditions: oceanographers could exploit this observation to measure transverse velocity differences through elongated floats in the field, where superdiffusion complicates collecting sufficient data to probe two-point turbulence statistics at a fixed separation effectively. On the other hand, by addressing the dynamics of inertial range particles floating in the coastal zone, these observations are crucial to improving our ability to predict the fate of meso- and macro-litter, a size class that is currently understudied."}]}]