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The influence of side hole undercutting on vorticity

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  • cris.virtual.department
    University of Music and Performing Arts Vienna
    University of Music and Performing Arts Vienna
  • cris.virtual.orcid
    0000-0002-5410-4724
  • dc.contributor.author
    Lasickas, Titas
    Chatziioannou, Vasileios
    Caridi, Giuseppe Carlo Alp
    Soldati, Alfredo
  • dc.date.accessioned
    2026-02-03T09:21:22Z
  • dc.date.available
    2026-02-03T09:21:22Z
  • dc.date.issued
    2025-05
  • dc.description.abstract
    Vortices in musical instruments form in a non-uniform flow, where air currents of different velocities or directions mix. Non-uniform flow, in the case of flutes or recorders, occurs at the labium, at the open end and at the side holes. Side hole undercutting has been shown to minimise vortex formation. Previous numerical simulations have visualised airflow velocity influence on vorticity. In experimental studies, where a tube with a side hole was excited by a loudspeaker, it was observed that speaker loudness and hole geometry influenced the vorticity. Recent simulations explore the effect of undercutting on the transient and show detailed results on the vortex formation. In this study, we aim to compare vortex formation between 6 different side hole geometries with a significant undercut and another 6 without undercutting, under realistic input conditions. Using the same geometry as in the simulations mentioned above, we employ time-resolved Particle Image Velocimetry to measure flow velocity at a sampling rate of 10 kHz. The recorder is excited utilising a commercial recorder mouthpiece with constant input conditions maintained at 100 Pa.
  • dc.description.note
  • dc.description.provenance
    Submitted by repo admin (repo-admin@mdw.ac.at) on 2026-02-03T09:21:22Z workflow start=Step: checkcorrectionstep - action:noUserSelectionAction No. of bitstreams: 1 035010_1_2.0002091.pdf: 3728966 bytes, checksum: d57f71d52db3a66f69e687fefc1e926b (MD5)
    Made available in DSpace on 2026-02-03T09:21:22Z (GMT). No. of bitstreams: 1 035010_1_2.0002091.pdf: 3728966 bytes, checksum: d57f71d52db3a66f69e687fefc1e926b (MD5) Previous issue date: 2025
  • dc.identifier.citation
    Titas Lasickas, Vasileios Chatziioannou, Giuseppe Carlo Alp Caridi, Alfredo Soldati; The influence of side hole undercutting on vorticity. Proc. Mtgs. Acoust. 24 May 2025; 58 (1): 035010. https://doi.org/10.1121/2.0002091
  • dc.identifier.doi
    10.1121/2.0002091
  • dc.identifier.uri
    https://dspace.mdw.ac.at/handle/123456789/26512
  • dc.language.iso
    en
  • dc.relation.journal
    Proceedings of Meetings on Acoustics
  • dc.rights.license
    CC-BY-4.0
  • dc.subject
    Acoustics
    Musical instruments
    Atmospheric dynamics
    Flow visualization
  • dc.title
    The influence of side hole undercutting on vorticity
  • dc.type
    text::journal::journal article
  • dspace.entity.type
    Publication
  • dspace.workflow.startDateTime
    2026-02-03T09:21:22.756Z
  • mdwlis.publication.firstRelease
    false
  • mdwlis.publication.mdwAttribution
    yes
  • mdwlis.subject.oefosDeKunstzweig
    NATURWISSENSCHAFTEN - Informatik
    NATURWISSENSCHAFTEN - Mathematik
    NATURWISSENSCHAFTEN - Physik, Astronomie
  • mdwrepo.correspondingAuthor
  • mdwrepo.subject.percentage
    20
    40
    40
  • oaire.citation.endPage
    8
  • oaire.citation.issue
    035010
  • oaire.citation.startPage
    1
  • oaire.citation.volume
    58
  • oairecerif.author.affiliation
    University of Music and Performing Arts Vienna
    University of Music and Performing Arts Vienna