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@ARTICLE{Osawa:644989,
      author       = {Osawa, Kosuke and Krishne Gowda, V. and Rosén, Tomas and
                      Roth, Stephan V. and Söderberg, L. Daniel and Shiomi,
                      Junichiro and Lundell, Fredrik},
      title        = {{R}egulating nanofibril assembly using diverse
                      flow-focusing channels},
      journal      = {Flow},
      volume       = {5},
      issn         = {2633-4259},
      address      = {Cambridge},
      publisher    = {Cambridge University Press},
      reportid     = {PUBDB-2026-00516},
      pages        = {E12},
      year         = {2025},
      abstract     = {Properties and functions of materials assembled from
                      nanofibrils critically depend on alignment. A material with
                      aligned nanofibrils is typically stiffer compared with a
                      material with a less anisotropic orientation distribution.
                      In this work, we investigate nanofibril alignment during
                      flow focusing, a flow case used for spinning of filaments
                      from nanofibril dispersions. In particular, we combine
                      experimental measurements and simulations of the flow and
                      fibril alignment to demonstrate how a numerical model can be
                      used to investigate how the flow geometry affects and can be
                      used to tailor the nanofibril alignment and filament shape.
                      The confluence angle between sheath flow and core flow, the
                      aspect ratio of the channel and the contractions in the
                      sheath and/or core flow channels are varied. Successful
                      spinning of stiff filaments requires: (i) detachment of the
                      core flow from the top and bottom channel walls and (ii) a
                      high and homogeneous fibril alignment. Somewhat expected,
                      the results show that the confluence angle has a relatively
                      small effect on alignment compared with contractions.
                      Contractions in the sheath flow channels are seen to be
                      beneficial for detachment, and contractions in the core flow
                      channel are found to be an efficient way to increase and
                      homogenise the degree of alignment.},
      cin          = {DOOR ; HAS-User / FS-SMA},
      ddc          = {530},
      cid          = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)FS-SMA-20220811},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3) /
                      SWEDEN-DESY - SWEDEN-DESY Collaboration
                      $(2020_Join2-SWEDEN-DESY)$},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3 /
                      $G:(DE-HGF)2020_Join2-SWEDEN-DESY$},
      experiment   = {EXP:(DE-H253)P-P03-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1017/flo.2025.8},
      url          = {https://bib-pubdb1.desy.de/record/644989},
}